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Pityriasis rosea is an acute, self‐limited exanthem that typically occurs in adolescence and young adulthood, classically featuring ovoid erythematous and scaly lesions on the trunk and proximal extremities. While its cause is not definitively known, the classic form of pityriasis rosea may result from the reactivation of latent human herpesvirus (HHV) infections (HHV‐6 and HHV‐7). Interestingly, drug eruptions that clinically and/or histopathologically resemble pityriasis rosea have also been reported. These pityriasis rosea‐like drug eruptions tend to occur at an older age and have a shorter duration than the classic type. As there are different management paradigms, the distinction between classic pityriasis rosea and the mimicking drug eruption is important to recognize. Herein, we report a case of a pityriasis rosea‐like drug eruption that occurred in association with imatinib mesylate treatment for chronic myeloid leukemia. We also review the clinicopathologic features of reported cases of pityriasis rosea‐like drug eruption, including those due to imatinib. While the clinical morphology of the cutaneous drug‐related eruption mimics the lesions seen in classic pityriasis rosea, the presence of unique histopathologic findings, including necrotic keratinocytes, interface dermatitis, and eosinophils, may aid in distinction. [ABSTRACT FROM AUTHOR]

Background: The epidemiology of skin diseases is difficult to map out because patients rarely seek care, and this is especially true for children and adolescents in resource-limited settings. The availability of only a few trained dermatologists in the workforce in Cameroon widens this knowledge gap. Understanding the pattern of common skin diseases in pediatric patients is crucial for accurate development of public health interventions and research. Methods: We conducted a hospital-based, cross-sectional study at the pediatrics and dermatology outpatient units at Douala Laquintinie Hospital (DLH) from January 2019 to December 31, 2022. Results: A total of 3947 patients were included. The mean age was 6.19 ± 5.31 years with a M/F sex ratio of 1/1.17. Immunoallergic and infectious skin diseases constituted 82.2% of the sample. Eczema predominated (n = 786, 19.91%) and was followed by prurigo (n = 680, 17.23%), scabies (n = 357, 9.04%), impetigo/furuncles (n = 313, 7.93%), dermatophyte infections (n = 265, 6.71%), and acne (n = 191, 4.84%). Prurigo was associated with the rainy season (p = 0.028). Acne [aOR = 1.66 (1.23-2.26), p = 0.001] and pityriasis rosea [aOR = 2.25 (1.47-3.45), p < 0.001) were more likely diagnosed in females while dermatophyte infections were more likely diagnosed in males [aOR = 1.42 (1.03-1.95), p = 0.031]. Conclusion: Overall, 23.97% of children and adolescents consulted at DLH have a skin disease. The top three skin diseases diagnosed among children and adolescents were eczema, prurigo, and scabies. [ABSTRACT FROM AUTHOR]

Background: Psoriasis is an inflammatory skin disease driven by upregulation of cytokines in the Th17 pathway, including interleukin‐36 (IL‐36). Previous studies have highlighted the utility of IL‐36 immunostaining for psoriasis compared to spongiotic dermatitis and other psoriasiform dermatoses; however, no study has examined the role of IL‐36 staining in distinguishing psoriasis from pityriasis rosea (PR) and pityriasis lichenoides (PL), known histologic mimickers of psoriasis. Methods: We compared the immunostaining pattern of IL‐36 for 21 PR cases, 22 PL cases, and 10 psoriasis cases. We graded the immunostaining as 0, negative; 1, focal weak; 2, diffuse weak; 3, focal, strong; or 4, diffuse strong. We further categorized stains as negative (0–2 score) or positive (3–4 score) and utilized Fisher's exact test to compare the immunostaining pattern of these entities. Results: All psoriasis specimens were positive for IL‐36, whereas all PR specimens were negative (p = 0.00000002). Twenty PL specimens were negative (p = 0.000001). Nine of 10 pityriasis lichenoides et varioliformis acuta cases were negative (p = 0.00012), and 11 of 12 cases of pityriasis lichenoides chronica were negative (p = 0.00003). Conclusions: Our findings highlight the potential role of IL‐36 immunostaining in distinguishing psoriasis from other psoriasiform dermatoses, including PR and PL. [ABSTRACT FROM AUTHOR]

Background: Plaque psoriasis is relatively straightforward to identify. When diagnostic concerns arise in atypical cases, a biopsy is needed. It is widely accepted that the Munro microabscess and the spongiform pustule of Kogoj are diagnostic pathological features. However, the diagnostic dilemma is likely to arise in cases without these specific pathological changes and typical clinical features. This study aimed to investigate clinical and pathological clues in distinguishing atypical plaque psoriasis from its mimics. Methods: We evaluated the clinicopathological features of 20 cases of atypical plaque psoriasis and 40 cases of psoriasis mimics as controls including pityriasis rosea (n = 10), pityriasis lichenoides chronica (n = 8), and subacute dermatitis (n = 22). Results: A retrospective analysis of the clinicopathological characteristics of patients with atypical plaque psoriasis and controls was performed. Pathologically, there were significant differences between the two groups in the types of parakeratosis (P = 0.046), epidermal capture of extravasated erythrocytes (P = 0.011), focal basal liquefied degeneration (P = 0.017), types of inflammatory cells (P = 0.000), and depth of inflammation (P = 0.000). Clinically, we found the presence of scales and crusts was significantly different between the two groups. Conclusion: This study offers insight into the clinicopathological features of atypical plaque psoriasis. These differential diagnostic features, compared with its mimics, are proposed to assist the clinician in the diagnosis and treatment of atypical plaque psoriasis. [ABSTRACT FROM AUTHOR]

This article discusses intertriginous skin disorders, which are common in general practice and can range from benign conditions to chronic diseases. These disorders occur in areas where opposing skin surfaces come into contact, such as the groin folds, axillae, and natal cleft. The article emphasizes the importance of a thorough history and physical examination in diagnosing these disorders and provides a list of common intertriginous skin disorders and their first-line management options. It suggests that referral to a dermatologist may be necessary in certain cases. Overall, the article concludes that most intertriginous skin disorders can be successfully managed in primary care. [Extracted from the article]

Pityriasis rosea is a common, self-limited disease which in its typical form should not raise diagnostic doubts. Nevertheless, its atypical presentations can be a challenge for the clinician, and hence it is important to be aware of them. Recognition of these forms may enable a correct diagnosis to be made and avoid unnecessary procedures. We present two patients for whom we believe atypical PR was the most likely the diagnosis. [ABSTRACT FROM AUTHOR]

Traditional herbs have a history of clinical use in anti-fatigue. However, several adverse effects of herbs have been identified. Pityriasis rosea-like eruption (PR-LE) is a rare cutaneous complication of herbs. To the best of our knowledge, there have been few reports of PR-LE following herbs. Here, we described a case of PR-LE that developed 6 days after taking anti-fatigue herbs. After the 17 days of stopping Aconitum carmichaelii Debx and Panax Ginseng, it notably faded. So, when anti-fatigue herbs being authorized for fatigue use, monitoring for potential adverse effects is necessary. [ABSTRACT FROM AUTHOR]

The article discusses a case of vesicular syphilis that mimicked subepidermal immunobullous disease in a 33-year-old man. Initially misdiagnosed as pityriasis rosea, the patient's condition improved with penicillin G treatment. The case highlights the importance of considering syphilis as a differential diagnosis in atypical presentations, emphasizing the need for a comprehensive diagnostic workup. The study was approved by MacKay Memorial Hospital IRB and conducted by researchers from the Philippines and Taiwan. [Extracted from the article]

Pityriasis rosea is a common skin condition that primarily affects children and young adults. It is characterized by the appearance of a herald patch, followed by a secondary rash of pink oval papules and plaques. The rash typically forms a "Christmas tree-like" pattern on the trunk, upper arms, and upper thighs. Diagnosis is usually made based on clinical presentation and does not require a skin biopsy. The condition is self-limiting and resolves within six to eight weeks. Treatment involves providing information and reassurance to patients, managing any itching with skincare advice, topical corticosteroids, and oral antihistamines. In severe cases, narrowband ultraviolet B phototherapy may be considered. [Extracted from the article]

This article presents a case study of a 10-year-old girl with gray-brown patches in the axillary and inguinal folds. The girl had been unsuccessfully treated with topical cream and oral medication for a presumed tinea infection. Further examination revealed gray-brown macules and patches in the affected areas, as well as perifollicular pigment deposits. Biopsies confirmed the diagnosis of lichen planus pigmentosus inversus (LPPI). LPPI is a rare variant of lichen planus characterized by asymptomatic or mildly itchy pigmented lesions in skin folds. Treatment options include topical corticosteroids or calcineurin inhibitors. [Extracted from the article]

Pityriasis rosea, is an acute self-limiting papulosquamous inflammatory disorder. It usually starts with a herald patch on the trunk and proximal extremities, followed by scaly oval patches that give them a “Christmas tree” appearance. The lesions may be associated with fever a rash. The disease can present as numerous morphologies such as papular, urticarial, lichenoid, and generalized that may be confused with other conditions such as secondary syphilis, seborrheic dermatitis, nummular eczema, pityriasis lichenoides chronica, tinea corporis, viral exanthems, lichen planus, and PR like eruption linked to particular drugs. We report a rare case of polymorphic pityriasis rosea in paediatric age group.

Background: Pityriasis Rosea (PR) is a common, yet enigmatic, dermatological condition characterized by a distinctive clinical presentation. Despite its prevalence, the aetiology and pathogenesis of PR remain elusive. Aims: To study the epidemiological and clinical aspects of patients with PR. To study dermoscopic findings and carry out histopathological correlation. Methods: A cross-sectional study of 50 patients was conducted. A detailed clinical history was taken and an examination was done followed by a dermoscopy. Quantitative data like age and duration of disease are presented with the help of standard deviation. Qualitative risk factors, like gender, age groups, symptomatology, site of lesion, findings or cutaneous examination, dermoscopy findings, and histopathology findings, are presented with the help of frequency and percentages. Results: PR shows male preponderance and mean age of occurrence being 30.8 ± 15.7 years. Forty per cent of patients had an atypical clinical presentation. The most frequently seen dermoscopy findings were diffuse red background (58%), peripheral collarette scale (62%), and peripheral dotted vessels (50%). On histopathology, the most common findings were spongiosis (44%), parakeratosis (38%), irregular acanthosis (34%), perivascular lymphocytic infiltrate (56%), and red blood cell extravasation (36%). Limitations: Sample size was less due to COVID. As this was a corss-sectional study follow up of patients could not be done. Conclusion: While the diagnosis of PR is clinical, it is difficult in atypical cases where dermoscopy comes to the aid. It also helps identify the age of lesions, thus helping decide the treatment strategy for patients. Biopsy remains the gold standard in ruling out other differentials of PR.

Hao Wu, Qing-Jie Ji, Yu-Yang Xu, Jian-Wei Zhu Department of Dermatology, Quzhou TCM Hospital at the Junction of Four Provinces Affiliated to Zhejiang Chinese Medical University, Quzhou, People’s Republic of ChinaCorrespondence: Jian-Wei Zhu, Email zjwmed@163.comAbstract: Pityriasis rosea (PR) is a common inflammatory, erythematous and scaly skin condition that usually affects individuals aged from 20 to 40 years old. The disease often exhibits a self-limiting course up to 6– 8 weeks. We report a 25-year-old female patient with a six-month history of red scaly rashes on the trunk and proximal limbs, accompanied by severe pruritus that has been remained ineffective conventional treatments. She was diagnosed as persistent pityriasis rosea. As abrocitinib has been proved to be effective for many inflammatory diseases, therefore in this case, we tried abrocitinib for the patient, and a good result had been achieved.Keywords: pityriasis rosea, abrocitinib, JAK-STAT pathway

Purpose: The study aimed to describe the dermoscopic features of pityriasis rosea among patients attending the skin clinic at Mbarara Regional Referral Hospital. Patients and methods: A hospital‐based cross‐sectional descriptive study conducted for a 6‐month period in the skin clinic of MRRH in Southwestern Uganda. Data were collected from consecutively recruited patients using structured questionnaires. Patients with a clinical diagnosis of pityriasis rosea were examined using a dermoscope and subsequently sent for KOH and TPHA tests to rule out fungal skin infection and secondary syphilis, respectively, and then received routine care at the skin clinic. Results: There were 54 patients with pityriasis rosea seen. Dermoscopy was done on a total of 162 lesions of which 19 were herald patches, 51 were truncal lesions, 52 on the extremities while 40 were on the face and neck regions. Common dermoscopic features consisted of a violaceous background noted in 145 (89.51%), white scales in 161 (99.38%), diffuse scale distribution in 57 (35.19%), perifollicular scale type in 61 (37.65%), and brown‐dotted pigmentary changes in 66 (40.74%). Other unique findings noted in a few lesions were cloudy structures, petechial spots, erosions, and punched out pits. Conclusion: Most prevalent dermoscopic features included: a violaceous background, white scales, diffuse scale distribution, perifollicular scale type, brown‐dotted pigmentary changes with no visible blood vessels nor follicular changes. Other unique less frequently seen findings were cloudy structures, petechial spots, erosions, and punched out pits. [ABSTRACT FROM AUTHOR]

Recent studies have focused on the role of human herpesvirus 6 (HHV-6) and human herpesvirus 7 (HHV-7) in PR etiology with varying results. In our study, with the approach that the discrepancy between the results may be related to the different samples and techniques used, we aimed to clarify the etiology by examining tissue and plasma samples using molecular methods and evaluating the results together with serological parameters. Skin biopsies and plasma samples of twenty-five PR patients were tested to detect HHV-6 and HHV-7 DNA using calibrated quantitative real-time polymerase chain reaction (CQ RT-PCR). IgG and IgM antibodies against HHV-6 and HHV-7 were tested by enzyme-linked immunosorbent assay and indirect immunofluorescence. Of the patient group, 64% were positive for HHV-6 IgG without IgM positivity. HHV-6 DNA was present in seven tissue and ten plasma samples. HHV-7 positivity was 100% and 12% for IgG and IgM antibodies, respectively. HHV-7 DNA was detected in four tissue samples and one plasma sample. Patients with HHV-7 DNA-positive plasma and tissue samples had also HHV-7 IgM antibodies. In conclusion, our results seem to support the role of HHV-6/HHV-7 in the etiology of PR. To clarify the etiology of PR and avoid confusion, the collection of different biological materials simultaneously and the usage of CQ RT-PCR as a diagnostic technique are recommended. [ABSTRACT FROM AUTHOR]

Background: Pityriasis Rosea (PR) is a common, yet enigmatic, dermatological condition characterized by a distinctive clinical presentation. Despite its prevalence, the aetiology and pathogenesis of PR remain elusive. Aims: To study the epidemiological and clinical aspects of patients with PR. To study dermoscopic findings and carry out histopathological correlation. Methods: A cross-sectional study of 50 patients was conducted. A detailed clinical history was taken and an examination was done followed by a dermoscopy. Quantitative data like age and duration of disease are presented with the help of standard deviation. Qualitative risk factors, like gender, age groups, symptomatology, site of lesion, findings or cutaneous examination, dermoscopy findings, and histopathology findings, are presented with the help of frequency and percentages. Results: PR shows male preponderance and mean age of occurrence being 30.8 ± 15.7 years. Forty per cent of patients had an atypical clinical presentation. The most frequently seen dermoscopy findings were diffuse red background (58%), peripheral collarette scale (62%), and peripheral dotted vessels (50%). On histopathology, the most common findings were spongiosis (44%), parakeratosis (38%), irregular acanthosis (34%), perivascular lymphocytic infiltrate (56%), and red blood cell extravasation (36%). Limitations: Sample size was less due to COVID. As this was a corss-sectional study follow up of patients could not be done. Conclusion: While the diagnosis of PR is clinical, it is difficult in atypical cases where dermoscopy comes to the aid. It also helps identify the age of lesions, thus helping decide the treatment strategy for patients. Biopsy remains the gold standard in ruling out other differentials of PR. [ABSTRACT FROM AUTHOR]

Luca Potestio,&ast; Fabrizio Martora,&ast; Sara Cacciapuoti, Matteo Megna, Alessia Villani, Angelo Ruggiero Section of Dermatology - Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy&ast;These authors contributed equally to this workCorrespondence: Angelo Ruggiero, Section of Dermatology - Department of Clinical Medicine and Surgery, University of Naples Federico II, Via Pansini 5, Napoli, 80131, Italy, Tel +39 - 081 – 7462457, Fax +39 - 081 – 7462442, Email angeloruggiero1993@libero.itAbstract: COVID-19 pandemic completely changed every aspect of human life. Several measures were adopted to limit the spreading of the infection. Among these, vaccination was the main one. Globally, vaccination campaign was a success, showing to be efficient in controlling and preventing the SARS-Cov2 infection, reducing the risk of disease progression, hospitalization, and mortality. However, with the increasing number of vaccines administered, several cutaneous reactions were described, making dermatologists key players in their recognition and treatment. Among these, also viral reactivations have been described. In particular, cases of Pityriasis Rosea (PR) and PR-like reactivations have been collected. An early diagnosis is mandatory to avoid mistreatments. In this context, we conducted a review of the current literature investigating cases of PR following COVID-19 vaccination with the aim of understanding the possible pathogenetic mechanisms and causal correlation as well as to investigate the risk of this cutaneous eruption, to offer clinicians a wide perspective on the linkage between PR and COVID-19 vaccines.Keywords: COVID-19, vaccination, pityriasis rosea, safety

Introduction: Mucocutaneous complications or adverse events due to SARS-CoV-2 infection or vaccination have been well delineated in the literature, respectively. Most eruptions are considered mild and self-limiting; however, for the atypical cases with a tentative clinical diagnosis, performing a biopsy and histopathological assessment is pivotal to confirm the diagnosis and subsequently prescribe a more tailored treatment. Despite the diverse reporting of such incidents globally, most studies restrict the rate of biopsied cases to less than 15%. Case Presentations: This case series elucidates 20 patients referred to the tertiary dermatology clinic, including 14 COVID-19 infection-related eruptions such as lichen planus (LP), cutaneous vasculitis, pityriasis rosea (PR), discoid lupus erythematosus, guttate psoriasis, sarcoidosis, Raynaud’s phenomenon, non-specific lesions resembling genital warts, Beau’s line, and one severe case of purpura fulminans with a promising outcome. Moreover, we presented six vaccine-induced cases comprising LP, urticarial vasculitis, PR, parapsoriasis, and localized morphea. The diagnosis of all challenging cases has been proven by histopathological evaluation. We included pertaining anamnesis details of each patient and vivid classifying images to pinpoint the morphologic features of each condition. Discussion: In line with our previous studies, the vaccine-induced eruptions were less severe compared to infection-related complications of COVID-19 and are mostly controllable by antihistamines and corticosteroid administration. Therefore, reporting such events should not impede COVID-19 vaccination in the general population.

This article discusses a case of scabies with an unusual presentation, known as "scabies surrepticius" or "scabies incognito." Scabies is typically characterized by generalized excoriated, pruritic papules and burrows in specific areas of the body. However, in this case, the patient presented with pruritic papular lesions all over the body, including perforating lesions and abscesses. The diagnosis was confirmed through histopathology, which revealed the presence of the mite Sarcoptes scabiei. The article emphasizes the importance of considering scabies as a differential diagnosis in atypical presentations and highlights the need for comprehensive tissue examinations for accurate diagnosis. [Extracted from the article]

Healthcare professionals often encounter the challenge of drug-induced skin eruptions in their daily practice. Typically, dermatologists are tasked with diagnosing these conditions, which can vary from common rashes to specific dermatoses. Our report highlights two patients who experienced a pityriasis rosea-like eruption due to systemic isotretinoin treatment for acne vulgaris [ABSTRACT FROM AUTHOR]

Pityriasis rosea (PR) is a common skin condition characterized by erythematous and squamous lesions on the trunk and limbs. It is more frequent in pregnant women, possibly due to altered immunity during pregnancy. Previous studies have suggested a link between PR in pregnancy and complications such as spontaneous abortions and low birth weight, but newer studies have not shown this association. A recent cohort study found that pregnancy complications were associated with viral load, constitutional symptoms, and body surface area involvement in women with PR. Neonatal complications were also reported, with evidence of active viral infection in both the mother and fetus. The presence of other members of the Herpesviridae family and other dermatoses should be considered in cases of PR-like eruptions during pregnancy. Some studies have found no significant impact of PR on pregnancy outcomes, while others have identified clinical characteristics associated with worse prognosis. Close monitoring and consideration of antiviral treatment may be necessary for high-risk patients. Further research is needed to establish guidelines for managing PR in pregnant women. [Extracted from the article]

Background Psoriasis (PS), vitiligo (VT), and Pityriasis rosea (PR) are chronic skin diseases often occurring as a consequence of exaggerated immune responses. These skin manifestations can be triggered as a result of the molecular mimicry between viral protein (s) and host protein (s), which could generate auto-antibodies. In addition, it can be hypothesised that skin diseases are manifestations of the reduced immunity that is observed in chronic hepatitis B virus (HBV)-infected individuals. Aims and Objective To investigate the presence of HBV in PS, VT, and PR cases and Human Herpes Virus (HHV) 6 and 7 in PR cases. Materials and Methods DNA extracted from healthy controls (n = 20), PS (n = 10), VT (n = 11), and PR (n = 12) were subjected to HBV-S gene-specific polymerase chain reactions (PCRs) and HHV 6-UL57 and HHV7-UL10 gene-specific PCRs. PCR products of positive samples (HBV and HHV 6 and 7 DNA) of expected length were bi-directionally sequenced using overlapping primers. Sequence identification was performed by NCBI BLAST and analysed by multiple sequence alignment. HBV DNA copy number was determined through quantitative real-time PCR. The blood samples were also tested for HBV serological markers and Interferon gamma (IFN-γ) by enzyme immunoassays. Results The PCR data and Immunoassay study revealed that seven out of 12 PR, six out of 10 PS, and six out of 11 VT cases had signs of HBV infection. HHV 6 DNA was detected in four, whereas HHV 7 DNA was found in two of the 12 PR blood samples. PR6 presented the evidence of both HHV 6 and 7 co-infections. Conclusion Observing the correlation of HBV with skin diseases, albeit at the pilot level, a larger study is warranted to identify HBV infection in skin disease patients. The evidence of HHV 6 and HHV 7 DNA in PR cases supports the HHV infection linkage with PR.

Subacute cutaneous lupus erythematosus (SCLE) is a condition that might pose a diagnostic challenge. The aim of this study was to assess the usefulness of videodermoscopy in the differentiation of SCLE from other erythematous-desquamative dermatoses. Consecutive patients with SCLE (n = 27), psoriasis (n = 36), nummular eczema (n = 30), mycosis fungoides (n = 26), and pityriasis rosea (n = 20) referred to our Department of Dermatology were recruited for this study. A representative lesion was visualized using a Canfield D200EVO Videodermatoscope (Canfield Scientific GmbH, Bielefeld, Germany) and evaluated for the following parameters: vessels (morphology and distribution), scales (color and distribution), follicular findings, colors and morphologies, and presence of specific clues. SCLE was predominantly characterized by a polymorphous vascular pattern (92.6%) of unspecific distribution (92.6%) over a pink-red background (74.1%). Gray-brown dots were present in 10 (37.0%) cases, and pigmentation was noted in 15 (55.6%) patients, including peripheral pigmentation in 7 (25.9%) patients. Videodermoscopic evaluation showed significant differences between SCLE and psoriasis, which was characterized by regularly distributed dotted vessels. Although some common dermoscopic features with MF were noted, the presence of yellow structureless areas and red dots/globules favored the diagnosis of MF. In conclusion, a polymorphic vascular pattern, especially in association with gray-brown dots and/or peripheral pigmentation, is a valuable clue for the differentiation of SCLE from other erythematous-desquamative dermatoses. [ABSTRACT FROM AUTHOR]

Introduction: Mucocutaneous complications or adverse events due to SARS-CoV-2 infection or vaccination have been well delineated in the literature, respectively. Most eruptions are considered mild and self-limiting; however, for the atypical cases with a tentative clinical diagnosis, performing a biopsy and histopathological assessment is pivotal to confirm the diagnosis and subsequently prescribe a more tailored treatment. Despite the diverse reporting of such incidents globally, most studies restrict the rate of biopsied cases to less than 15%. Case Presentations: This case series elucidates 20 patients referred to the tertiary dermatology clinic, including 14 COVID-19 infection-related eruptions such as lichen planus (LP), cutaneous vasculitis, pityriasis rosea (PR), discoid lupus erythematosus, guttate psoriasis, sarcoidosis, Raynaud's phenomenon, non-specific lesions resembling genital warts, Beau's line, and one severe case of purpura fulminans with a promising outcome. Moreover, we presented six vaccine-induced cases comprising LP, urticarial vasculitis, PR, parapsoriasis, and localized morphea. The diagnosis of all challenging cases has been proven by histopathological evaluation. We included pertaining anamnesis details of each patient and vivid classifying images to pinpoint the morphologic features of each condition. Discussion: In line with our previous studies, the vaccine-induced eruptions were less severe compared to infection-related complications of COVID-19 and are mostly controllable by antihistamines and corticosteroid administration. Therefore, reporting such events should not impede COVID-19 vaccination in the general population. [ABSTRACT FROM AUTHOR]

In the wake of a global COVID-19 pandemic, where innovations in vaccination technology and the speed of development and distribution have been unprecedented, a wide variety of post-vaccination cutaneous reactions have surfaced. However, there has not been a systematic review that investigates pityriasis eruptions and the associated variants following COVID-19 inoculations. A PubMed search using Preferred Reporting Items for Systematic Reviews and Meta-Analyses was performed to find case reports from the earliest record through November 2022. Data including types of vaccination and pityriasis were extracted and a quality review was performed; 47 reports with 94 patients were found: 64.9% had pityriasis rosea (PR), 3.2% PR-like eruptions, 16.0% pityriasis rubra pilaris, 7.4% pityriasis lichenoides et varioliformis acuta, 3.2% pityriasis lichenoides chronica, and 5.3% had reactions described as atypical. The top three COVID-19 vaccinations reported were Pfizer-BioNTech (47.9%), Oxford-AstraZeneca (11.7%), and Moderna (8.5%). Pityriasis reactivity was reported most frequently after the Pfizer-BioNTech vaccination, with pityriasis rosea being the most common variant. A large difference was additionally found between the ratio of post-vaccination pityriasis reactions following Pfizer and Moderna vaccinations (5.63), and the ratio of Pfizer's usage in the United States as of December 28, 2022 relative to that of Moderna (1.59). Further studies with adequate follow-up periods and diagnostic testing will thus need to be performed to elucidate the root of this discrepancy and better characterize the association between different pityriasis reactions and COVID-19 vaccinations. [ABSTRACT FROM AUTHOR]

Objective To describe and compare the dermoscopic features of various papulosquamous skin disorders. Methods This study is an observational descriptive comparative study performed on 169 patients with papulosquamous skin diseases including psoriasis, lichen planus, eczema, pityriasis rosea and pityriasis lichenoides chronica at the outpatient clinic at the dermatology department of AL-Sader teaching hospital in Basra during the period between April 2021 to September 2022. A detailed history was taken from each patient with a complete physical examination and all relevant investigations were done. The dermoscopic examination was done using a hand-held dermoscope (x10) and photos were taken with a mobile phone camera attached to the Dermlight DL200 dermoscope then data were collected and statistically analyzed. Results Dermoscopic examination of psoriasis showed that light red background, regularly dotted vessels and diffuse white scales were the most common findings. The most characteristic dermoscopic features of lichen planus was Wickham striae which was seen as radial streaming followed by a reticular pattern, the lesion was purple in color, non-scaly and non-vascular lesions, the scales if present were mainly peripheral white scales, while the vascular lesions of lichen planus were usually dotted peripheral blood vessels. Patchy dotted blood vessels on a dull red background covered by yellow-white scales in patchy distribution were the common findings seen in eczema. According to a study of patients with pityriasis rosea, the most significant dermoscopic features observed in patients were yellow background color, peripheral white scales, and avascular pattern. Pityriasis lichenoides chronica was found to be associated with peripheral dotted vessels on orangeyellow background covered by white scales on a peripheral or diffuse pattern. Conclusion Dermoscopy is a simple non-invasive safe bedside tool that provides important information to help in diagnosis or narrowing differential diagnosis of many papulosquamous skin diseases. [ABSTRACT FROM AUTHOR]

Pityriasis rosea, is an acute self-limiting papulosquamous inflammatory disorder. It usually starts with a herald patch on the trunk and proximal extremities, followed by scaly oval patches that give them a “Christmas tree” appearance. The lesions may be associated with fever a rash. The disease can present as numerous morphologies such as papular, urticarial, lichenoid, and generalized that may be confused with other conditions such as secondary syphilis, seborrheic dermatitis, nummular eczema, pityriasis lichenoides chronica, tinea corporis, viral exanthems, lichen planus, and PR like eruption linked to particular drugs. We report a rare case of polymorphic pityriasis rosea in paediatric age group. [ABSTRACT FROM AUTHOR]

Many skin manifestations of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infection reflect activation of cutaneous and systemic immune responses involving effector pathways of both the innate and adaptive arms of the immune system. This article reviews evidence from the recent clinical and scientific literature that informs the current understanding of the consequences of coronavirus disease 2019 (COVID-19)-induced immune cell activation, as relevant to dermatology. Topics include the clinical consequences of autoantibody production in patients with COVID-19, immunologic evidence for chilblains as a manifestation of SARS-CoV-2 infection, and the relationship between type I interferons and COVID-19 disease severity.

Hao Wu, Qing-Jie Ji, Yu-Yang Xu, Jian-Wei Zhu Department of Dermatology, Quzhou TCM Hospital at the Junction of Four Provinces Affiliated to Zhejiang Chinese Medical University, Quzhou, People’s Republic of ChinaCorrespondence: Jian-Wei Zhu, Email zjwmed@163.com

Francesco Drago,1 Cristian Fidanzi,2,3 Giulia Ciccarese4 1Dermatology Clinic, Casa di Cura Villa Montallegro, Genoa, Italy; 2Unit of Dermatology, Department of Medical and Oncological Area, University of Pisa, Pisa, Italy; 3Unit of Dermatology, Carrara Hospital, Carrara, Italy; 4Unit of Dermatology, Department of Medical and Surgical Sciences, University of Foggia, Foggia, ItalyCorrespondence: Giulia Ciccarese, Department of Medical and Surgical Sciences, University of Foggia, Viale Pinto, 1, Foggia, 71122, Italy, Tel +390881732205, Email giulia.ciccarese@unifg.it

Recent studies have focused on the role of human herpesvirus 6 (HHV-6) and human herpesvirus 7 (HHV-7) in PR etiology with varying results. In our study, with the approach that the discrepancy between the results may be related to the different samples and techniques used, we aimed to clarify the etiology by examining tissue and plasma samples using molecular methods and evaluating the results together with serological parameters. Skin biopsies and plasma samples of twenty-five PR patients were tested to detect HHV-6 and HHV-7 DNA using calibrated quantitative real-time polymerase chain reaction (CQ RT-PCR). IgG and IgM antibodies against HHV-6 and HHV-7 were tested by enzyme-linked immunosorbent assay and indirect immunofluorescence. Of the patient group, 64% were positive for HHV-6 IgG without IgM positivity. HHV-6 DNA was present in seven tissue and ten plasma samples. HHV-7 positivity was 100% and 12% for IgG and IgM antibodies, respectively. HHV-7 DNA was detected in four tissue samples and one plasma sample. Patients with HHV-7 DNA-positive plasma and tissue samples had also HHV-7 IgM antibodies. In conclusion, our results seem to support the role of HHV-6/HHV-7 in the etiology of PR. To clarify the etiology of PR and avoid confusion, the collection of different biological materials simultaneously and the usage of CQ RT-PCR as a diagnostic technique are recommended.

Pityriasis rosea (PR) is a common acute and usually self-limiting papulosquamous dermatosis that typically affects children and young adults. Fixed-drug eruption (FDE) is a type of cutaneous adverse drug reaction that reoccurs at the same site when the offending drug is reingested. We are presenting this case of a 2-year-old child because of the simultaneous presentation of both PR and FDE in the same individual at the same time. [ABSTRACT FROM AUTHOR]

To mitigate the impact of the COVID-19 pandemic, several vaccines have been developed and administered to the public since 2021. A spectrum of cutaneous reactions has been reported among some of the vaccinated individuals. In this case series, we describe three cases of pityriasis rosea and pityriasis rosea-like eruption that manifested after COVID-19 vaccinations, which might suggest the vaccines as a possible trigger.