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Topical 5-fluorouracil (5-FU) is used to treat actinic keratosis, although side effects limit treatment. Microneedling might be a tool for reducing treatment duration.To evaluate microneedling to promote 5-FU delivery at different concentrations (0.5% and 5%) for actinic keratoses (AKs) treatment.Forty-four patients with facial AKs subjected to 1.0 mm microneedling on 1 side of the face were randomized into 5% 5-FU or 0.5% 5-FU groups. Evaluations of efficacy and safety were conducted on days 21 and 111.Forty-four patients aged 47 to 85 years were enrolled. Complete clearance of AKs was similar within groups for the side of the face treated with microneedling and 5-FU and the side treated with 5-FU alone in both the 5% and 0.5% 5-FU groups. Microneedling and 5% 5-FU was superior to microneedling and 0.5% 5-FU to reduce AKs (p = .025). Microneedling and 5% 5-FU resulted in fewer adverse effects than 5% 5-FU alone (p = .011).Topical 5% and 0.5% 5-FU delivery for 3 days after microneedling was effective for treating facial AKs and equivalent to 5% and 0.5% 5-FU alone for 15 days after 3 months of follow-up. Microneedling may potentiate 5-FU treatment, reducing treatment time without losing efficacy.

Melanocytic nevi submitted to trauma can undergo clinical, dermoscopic, and even histological changes, making it difficult to differentiate them from a melanoma.The aim of this study is to evaluate the dermoscopic changes of traumatized nevi after dermabrasion.Dermoscopic images of acquired melanocytic nevi were compared before and 4 weeks after half of their area had undergone dermabrasion.The sample consisted of 50 lesions from 15 patients. The homogeneous pattern was the most frequent, followed by the reticular, cobblestone, and globular patterns. After dermabrasion, nearly half of the lesions (46%) became dermatoscopically asymmetric. Among all lesions, structureless areas, dotted vessels and erythema were the most frequent new dermoscopic structures.Trauma after dermabrasion may induce significant dermoscopic changes in melanocytic nevi. Although the global pattern did not change, most of the lesions became asymmetric, with the appearance or fading of dermoscopic structures and colors. A history of recent trauma should be investigated when evaluating pigmented lesions.

The presence of myofibroblast differentiation has been proposed as an invading mechanism in basal cell carcinomas. However, small studies regarding α-smooth muscle actin positivity have led to conflicting results. This review of 100 cases examines the association between α-smooth muscle actin positivity on immunohistochemical studies and the clinical and histopathological characteristics of the tumor, including tumor size, thickness, subtype, topography, ulceration, 5-year recurrence rate, and age at diagnosis.

PURPOSE National epidemiologic data on melanoma are scarce in Brazil. The current work presents final demographic, clinical, and pathologic results from the Brazilian Melanoma Group database to detail how patients with melanoma present at diagnosis. METHODS The online database includes patients diagnosed between 1982 and 2015 and evaluated at their centers of origin between 2001 and 2016. The primary objective was to describe the demographic, clinical, and pathologic characteristics of the patients, and secondary objectives were to investigate the association between clinical and pathologic variables of interest. RESULTS A total of 1,596 patients were included. Median age was 52 years, 57% were women, and the majority were identified as white. Invasive melanoma was diagnosed in 1,297 patients, mostly localized, whereas 299 (19%) had in situ disease (TisN0M0). Only 165 patients had initial lymph node involvement. Fitzpatrick skin types I or II were slightly more frequent with in situ melanoma (73%) than with invasive disease (67%; P = .054). The median Breslow thickness was 0.95 mm, Clark levels 2 and 3 comprised nearly 70% of cases, and ulceration was present in 18% of patients. The mitotic rate was significantly associated with the presence of ulceration and both vascular and perineural invasion but not with margin positivity, whereas histologic regression was associated with both intratumoral and peritumoral inflammatory infiltrates. CONCLUSION Despite the limitations of an observational, registry-based study, the current results provide a general profile of patients with cutaneous melanoma in Brazil at the time of diagnosis.

In addition to the infestations and bacterial infections reported in part I, the study of entomodermoscopy also involves descriptions of dermoscopic findings of a growing number of viral and fungal infections, among others. In this article, the main clinical situations in viral infections where dermoscopy can be useful will be described, that is in the evaluation of viral warts, molluscum contagiosum, and even in recent scenarios such as the COVID-19 pandemic. As for fungal infections, dermoscopy is particularly important, not only in the evaluation of the skin surface, but also of skin annexes, such as hairs and nails. The differential diagnosis with skin tumors, especially melanomas, can be facilitated by dermoscopy, especially in the evaluation of cases of verruca plantaris, onychomycosis and tinea nigra.

Background: The quantitative and qualitative presence of melanocytic nevi is considered a significant risk factor for melanoma. Little is known whether patients showing any of the recognized global dermoscopic nevus patterns might also be considered at increased risk for the disease. Objectives: We aimed to investigate the frequency of global dermoscopic patterns of common nevi among melanoma patients and compare them to controls, as well as the dermoscopic patterns of atypical nevi between the groups. Methods: We included consecutive melanoma patients and age- and sex-matched controls who presented to our Department with at least 10 melanocytic nevi. Total body examination was performed, and all nevi had their dermoscopic pattern described. Global dermoscopic patterns of nevi were compared between groups, as well as atypical nevus patterns. Finally, nevus patterns were stratified by their location and also compared between groups. Results: We included 120 melanoma patients and 120 controls. Melanoma patients presented a larger number of common (p = 0.002) and atypical melanocytic nevi (p < 0.001) and more variability of dermoscopic nevus patterns (p < 0.001). No difference in the global dermatoscopic pattern of common nevi was observed between groups. The complex pattern of atypical nevi was associated with melanoma (OR = 2.87). Melanoma patients also showed more common nevi with a reticular pattern on the back (p = 0.014) and lower limbs (p = 0.041) as well as atypical nevi on the back with reticular pattern (p = 0.01), with reticular-homogeneous pattern (p = 0.001), and with reticular-globular pattern (p = 0.048) than controls. Nevi with multifocal pigmentation were also more frequent among melanoma patients (OR = 2.61). Conclusion: Melanoma patients tend to present a higher number of common reticular nevi on the back and lower limbs, as well as atypical nevi with a complex pattern, especially reticular, reticular-homogeneous, and reticular-globular on the back.

Made available in DSpace on 2022-04-29T08:29:30Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-07-01 Sociedade Brasileira de Dermatologia Total body mapping comprises photographic documentation of the entire body surface followed by digital dermatoscopy of selected melanocytic lesions, aiming to compare their evolution over time and identify new lesions. As this is an exam based on comparative analysis of serial dermoscopic body images, standardization of the technique for performing total body mapping is essential. Prepared by specialists from the Brazilian Society of Dermatology, using the modified Delphi method, this article provides recommendations for carrying out total body mapping in Brazil, regarding its indications, technical aspects, and the issuing of the report. Medical Sciences College Universidade do Estado do Rio de Janeiro Universidade Federal do Rio Grande do Sul Faculdade de Medicina do ABC Faculty of Medicine Universidade Federal de Minas Gerais Núcleo de Câncer de Pele A.C. Camargo Cancer Center Dermatology Discipline Faculty of Medicine Universidade Estadual Paulista Dermatology Discipline Faculty of Medicine Universidade Estadual Paulista

BACKGROUND: Melanocytic nevi can vary in size and number in pregnant women, and the differential diagnosis with melanoma may be challenging. OBJECTIVES: To describe changes in total body photography of pregnant women and dermoscopy aspects of their nevi. METHODS: A prospective cohort study with 703 melanocytic nevi from 18 women was performed, comparing them in the first and third trimester of pregnancy. Images were analyzed between the 2 periods for changes in dermoscopic aspects. RESULTS: Total body photography images indicated that 44% of patients had new lesions. Regarding the observed changes, there were symmetric or regular changes of the network (23% of cases), occurrence of new globules/dots (12.4%), new vascular structures (3.2%), new streaks (1.7%), and new structureless area (1.0%). Moreover, 55.0% of the nevi increased in size. Enlarging of the nevi was observed mostly on the abdomen (87.1%; P < 0.001) and showed more network changes (27.1%; P = 0.014) and formation of new globules and dots (16.0%; P < 0.001). Patients with a risk of developing melanoma presented more frequently enlarged nevi (45%; P = 0.019). The association between streak formation and skin type was significant (P = 0.012) and was more frequent in skin type II (2.7%), when compared with skin types III (1.3%) and IV (0%). CONCLUSIONS: Development of new melanocytic nevi may occur in pregnant women. The majority of the preexisting melanocytic nevi showed enlarging, and most of them presented with benign dermoscopic changes. The appearance of new streaks is more frequent in fair skin types. Patients with a personal or family history of melanoma in first-degree relatives presented more nevi with changes in size.

Objective: Normally, activation of tropomyosin-related kinase (TRK) receptors by neurotrophins (NTs) stimulates intracellular pathways involved in cell survival and proliferation. Dysregulation of NT/TRK signaling may affect neoplasm prognosis. Data on NT and TRK expression in melanomas are limited, and it is unclear whether NT/TRK signaling pathways are involved in the origin and progression of this neoplasm. Methods: We examined whether NT/TRK expression differs across different cutaneous melanoma grades and subtypes, and whether it is associated with melanoma prognosis and survival. A cross-sectional study was performed in which the expression of TrkA, TrkB, nerve growth factor (NGF), and brain-derived neurotrophic factor (BDNF) was analyzed by immunohistochemistry of 154 melanoma samples. We investigated NT/TRK expression associations with prognostic factors for melanoma, relapse-free survival (RFS), and overall survival (OS). Results: Of the 154 melanoma samples, 77 (55.4%) were TrkA immunopositive, 81 (58.3%) were TrkB immunopositive, 113 (81.3%) were BDNF immunopositive, and 104 (75.4%) were NGF immunopositive. We found NT/TRK expression associated strongly with several clinical prognostic factors, including the tumor-node-metastasis stage (p < 0.001), histological subtype (p < 0.001), and Clark level (p < 0.05), as well as with a worse OS (p < 0.05 for all, except TrkB) and RFS (p < 0.05 for all). Conclusions: Our results show strong associations of NT/TRK expression with melanoma stage progression and a poor prognosis.

Background Melanoma is the most aggressive type of skin cancer and is associated with environmental and genetic risk factors. It originates in melanocytes, the pigment-producing cells. Single nucleotide polymorphisms (SNPs) in pigmentation genes have been described in melanoma risk modulation, but knowledge in the field is still limited. Methods In a case-control approach (107 cases and 119 controls), we investigated the effect of four pigmentation gene SNPs (TYR rs1126809, HERC2 rs1129038, SLC24A5 rs1426654, and SLC45A2 rs16891982) on melanoma risk in individuals from southern Brazil using a multivariate logistic regression model and multifactor dimensionality reduction (MDR) analysis. Results Two SNPs were associated with an increased risk of melanoma in a dominant model: rs1129038AA and rs1426654AA [OR = 2.094 (95% CI: 1.106–3.966), P = 2.3 10− 2 and OR = 7.126 (95% CI: 1.873–27.110), P = 4.0 10− 3, respectively]. SNP rs16891982CC was associated with a lower risk to melanoma development in a log-additive model when the allele C was inherited [OR = 0.081 (95% CI: 0.008–0.782), P = 3 10− 2]. In addition, MDR analysis showed that the combination of the rs1426654AA and rs16891982GG genotypes was associated with a higher risk for melanoma (P = 3 10− 3), with a redundant effect. Conclusions These results contribute to the current knowledge and indicate that epistatic interaction of these SNPs, with an additive or correlational effect, may be involved in modulating the risk of melanoma in individuals from a geographic region with a high incidence of the disease.

Over the last few years, several articles on dermoscopy of non-neoplastic dermatoses have been published, yet there is poor consistency in the terminology among different studies.We aimed to standardize the dermoscopic terminology and identify basic parameters to evaluate in non-neoplastic dermatoses through an expert consensus.The modified Delphi method was followed, with two phases: (i) identification of a list of possible items based on a systematic literature review and (ii) selection of parameters by a panel of experts through a three-step iterative procedure (blinded e-mail interaction in rounds 1 and 3 and a face-to-face meeting in round 2). Initial panellists were recruited via e-mail from all over the world based on their expertise on dermoscopy of non-neoplastic dermatoses.Twenty-four international experts took part in all rounds of the consensus and 13 further international participants were also involved in round 2. Five standardized basic parameters were identified: (i) vessels (including morphology and distribution); (ii) scales (including colour and distribution); (iii) follicular findings; (iv) 'other structures' (including colour and morphology); and (v) 'specific clues'. For each of them, possible variables were selected, with a total of 31 different subitems reaching agreement at the end of the consensus (all of the 29 proposed initially plus two more added in the course of the consensus procedure).This expert consensus provides a set of standardized basic dermoscopic parameters to follow when evaluating inflammatory, infiltrative and infectious dermatoses. This tool, if adopted by clinicians and researchers in this field, is likely to enhance the reproducibility and comparability of existing and future research findings and uniformly expand the universal knowledge on dermoscopy in general dermatology. What's already known about this topic? Over the last few years, several papers have been published attempting to describe the dermoscopic features of non-neoplastic dermatoses, yet there is poor consistency in the terminology among different studies. What does this study add? The present expert consensus provides a set of standardized basic dermoscopic parameters to follow when evaluating inflammatory, infiltrative and infectious dermatoses. This consensus should enhance the reproducibility and comparability of existing and future research findings and uniformly expand the universal knowledge on dermoscopy in general dermatology.

In the 1980s, the increasing incidence of skin cancers prompted the development of noninvasive medical devices to improve skin cancer diagnosis in daily dermatology practice. As a result of the development of these noninvasive techniques, diagnosis is now established earlier and with better accuracy. These advances are of great benefit to high-risk patients, who previously would have had to undergo several excisions. In this review, we focus on the classic technique of dermoscopy and the more recent digital version, as well as on advanced noninvasive imaging techniques, such as reflectance confocal microscopy and optical coherence tomography. On the basis of their specific features, these noninvasive medical devices can be used not only to diagnose and monitor melanoma and nonmelanoma skin cancers but also to choose the best therapy and follow the patient’s response to treatment in vivo.

Recurrent nevi occur following removal of melanocytic nevi mainly after shaving excision. Due to its differential diagnosis with melanoma, its recognition can be challenging. To evaluate clinical and dermoscopic predictors of recurrent nevi. Clinical data on 224 melanocytic nevi were collected, together with dermoscopic images. Shave biopsy was performed and the underside of the surgical specimen was examined using ex vivo dermoscopy. A total of 195 lesions were followed for six months. Recurrent nevi were observed in 59 lesions. The occurrence of recurrent nevi was inversely associated with increased patient age. Darker skin phototypes and the compound nevus type were more associated with recurrence. Regarding dermoscopic features, the presence of dark brown colour, multiple colours, dots, terminal hair, and an annular-distributed pigmentation around adnexal structures were associated with recurrent nevi. Ex vivo dermoscopy showed that visible hyperpigmentation on the underside of the surgical specimen was correlated with recurrence. Multivariable analysis showed that annular hyperpigmentation and age were the most relevant predictors of recurrence. Individuals with dark skin type and young adults are at increased risk of recurrent nevi. Dermoscopy of the primary lesion and the underside of the surgical specimen are helpful in predicting recurrence after shave biopsy.

Background: Little is known about the dermoscopic evaluation of cutaneous adverse drug reactions (CADRs). Objectives: To evaluate the dermoscopic patterns of CADRs and identify those associated with severe cutaneous adverse reactions to drugs (SCARDs). Patients and Methods: Patients included in this study from May 2015 to April 2016 had presented with CADRs. CADR presentation and classification were based on standard criteria. SCARDs included Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN), overlap SJS/TEN, drug reaction with eosinophilia and systemic symptoms (DRESS), and acute generalized exanthematous pustulosis (AGEP). The dermoscopic features of CADRs were described and compared according to the severity of the reactions. Results: Sixty-nine patients were included. Sixteen patients (23.2%) presented SCARDs. The main dermoscopic findings in SJS, overlap SJS/TEN and TEN were black dots or necrotic areas (100%). Erosion [respectively, 4/6 (66.7%), 3/3 (100%) and 1/1 (100%)], necrotic borders [respectively, 4/6 (66.7%), 3/3 (100%) and 1/1, (100%)] and epidermal detachment [respectively, 5/6 (83.3%); 2/3 (66.7%) and 1/1 (100%)] were also common among these reactions. Erythema and purpuric dots were the main dermoscopic findings [respectively, 5/6 (83.3%) and 4/6 (66.7%)] in DRESS. In non-severe reactions, the most prevalent structures were erythema and purpura in exanthema [respectively, 31/33 (93.9%) and 24/33 (72.7%)] and erythema and vascular structures in urticarial reactions [respectively, 6/6 (100%) and 3/6 (50%)]. Black dots or necrotic areas, epidermal detachment, necrotic borders and erosion were highly associated with SCARDs (P < 0.001). Conclusions: Dermoscopy improves clinical recognition of SCARDs.

BACKGROUND Melanoma is the leading cause of death from skin cancers and its etiology is complex. Recent discoveries related to genetic risk factors are helping us to understand melanoma pathogenesis better. Nuclear factor-κB (NF-κB) has a critical role in immunity, inflammation, and tumor growth. The 94ins/del ATTG (rs28362491) polymorphism located in the NFKB1 gene has been associated to various cancers and the ATTG2/ATTG2 genotype was correlated to melanoma risk in Sweden. The CYP19A1 gene encodes the enzyme aromatase, which is active in malignant melanoma tissue. In addition, the CYP19A1 TCT insertion/deletion variant in intron 4 (rs11575899) has been associated with an increased incidence of cancer, albeit with conflicting results. The goal of this study was to investigate possible associations between these two gene variants and melanoma. METHODS In this case-control study, we evaluated 117 cutaneous melanoma patients and 116 controls from southern Brazil. Genotyping of rs28362491 and rs11575899 was carried out by means of PCR amplification and capillary electrophoresis. Logistic regression was used to obtain odds ratios (ORs) of melanoma, according to genotypes. RESULTS We identified an association between the ATTG2/ATTG2 and melanoma [OR=1.78; 95% confidence interval (CI): 1.06-3.00; P=0.03]. In addition, there was a dose effect: for each ins allele in the genotype, the risk for melanoma increased (OR=1.51; 95% CI: 1.08-2.11; P=0.017). As regards the CYP19A1 variant, genotype 11 (del/del) was more frequent in patients than in controls (OR=1.85; 95% CI 1.06-3.22; P=0.03). CONCLUSION The NFKB1 ATTG2/ATTG2 and CYP19A1 del/del genotypes are significantly associated with melanoma and could be genetic markers of melanoma susceptibility in southern Brazilian population.

Made available in DSpace on 2018-12-11T17:27:33Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-01-01. Added 1 bitstream(s) on 2021-07-15T15:03:57Z : No. of bitstreams: 1 S0365-05962016000100049.pdf: 319668 bytes, checksum: 5210661e92fd56dd2bdededc908c4a4f (MD5) The last Brazilian guidelines on melanoma were published in 2002. Development in diagnosis and treatment made updating necessary. The coordinators elaborated ten clinical questions, based on PICO system. A Medline search, according to specific MeSH terms for each of the 10 questions was performed and articles selected were classified from A to D according to level of scientific evidence. Based on the results, recommendations were defined and classified according to scientific strength. The present Guidelines were divided in two parts for editorial and publication reasons. In this second part, the following clinical questions were answered: 1) which patients with primary cutaneous melanoma benefit from sentinel lymph node biopsy? 2) Follow-up with body mapping is indicated for which patients? 3) Is preventive excision of acral nevi beneficious to patients? 4) Is preventive excision of giant congenital nevi beneficious to patients? 5) How should stages 0 and I primary cutaneous melanoma patients be followed?. Hospital Israelita Albert Einstein Hospital Alemão Oswaldo Cruz-São Paulo Oncoderma-São Paulo Universidade Federal do Rio Grande do Sul (UFRGS) Hospital de Clínicas de Porto Alegre Departamento de Câncer de Pele A. C. Camargo Cancer Center Universidade Federal de Minas Gerais (UFMG) Universidade Estácio de Sá (UNESA) Hospital Ipiranga Universidade Estadual do Pará (UEPA) Instituto do Câncer do Estado de São Paulo (ICESP) Universidade Estadual Paulista “Júlio de Mesquita Filho”(UNESP) Universidade Estadual Paulista “Júlio de Mesquita Filho”(UNESP)

e22081 Background: Targeting the hedgehog (HH) protein family pathway has consistently shown activity in locally advanced and metastatic BCC. Itraconazole is an affordable agent with known toxicity profile that demonstrates in vitro HH signaling inhibition, suggesting a possible role in BCC treatment. Initial results of a phase 2 study designed to investigate efficacy of Itraconazole as neoadjuvant treatment in patients with resectable BCC are reported. Methods: Eligible pts had biopsy-proven resectable BCC, ECOG PS 0-3, adequate organ function and measurable disease. Dosing of I consisted of 200mg twice daily for 60 days followed by surgery. Simon two-stage design was used to test a null rate of 5% vs. 20% (power = 0.80; α = 0.05, unilateral). If ≥1 of 13 pts in stage 1 have objective response (OR) according to RECIST 1.1 criteria, 14 more pts will be enrolled. If ≥4 of 27 pts have OR, the treatment is worthy of further study. Secondary endpoints include safety and change in Ki-67 and Gli1. Results: Thirteen pts with 14 measurable lesions enrolled from Jan/2018 to Feb/2019; 1 pt was not evaluable, but was included in safety analysis. Demographics and outcomes are summarized in Table. After 60 days of treatment, all patients had R0 resection as primary planned and 1 (8.3%) PR was observed. There were no progressions during the study. OR rate was 8.3%. No grade 3 AE or SAE were reported. 6 pts had grade 1 or 2 AEs at least possibly related to I including depression, headache, GPT elevation, diarrhea, abdominal pain and bilirubin elevation. Conclusions: Itraconazole showed initial anti-tumor activity in pts with resectable BCC, no safety concerns were observed. Study will proceed to Simon’s second stage. Clinical Trial Information: NCT03972748 , 47011715.0.0000.5327 . [Table: see text]

Background: Deep learning convolutional neural networks (CNN) may facilitate melanoma detection, but data comparing a CNN's diagnostic performance to larger groups of dermatologists are lacking.Methods: Google's Inception v4 CNN architecture was trained and validated using dermoscopic images and corresponding diagnoses. In a comparative cross-sectional reader study a 100-image test-set was used (level-I: dermoscopy only; level-II: dermoscopy plus clinical information and images). Main outcome measures were sensitivity, specificity and area under the curve (AUC) of receiver operating characteristics (ROC) for diagnostic classification (dichotomous) of lesions by the CNN versus an international group of 58 dermatologists during level-I or -II of the reader study. Secondary end points included the dermatologists' diagnostic performance in their management decisions and differences in the diagnostic performance of dermatologists during level-I and -II of the reader study. Additionally, the CNN's performance was compared with the top-five algorithms of the 2016 International Symposium on Biomedical Imaging (ISBI) challenge.Results: In level-I dermatologists achieved a mean (±standard deviation) sensitivity and specificity for lesion classification of 86.6% (±9.3%) and 71.3% (±11.2%), respectively. More clinical information (level-II) improved the sensitivity to 88.9% (±9.6%, P = 0.19) and specificity to 75.7% (±11.7%, P < 0.05). The CNN ROC curve revealed a higher specificity of 82.5% when compared with dermatologists in level-I (71.3%, P < 0.01) and level-II (75.7%, P < 0.01) at their sensitivities of 86.6% and 88.9%, respectively. The CNN ROC AUC was greater than the mean ROC area of dermatologists (0.86 versus 0.79, P < 0.01). The CNN scored results close to the top three algorithms of the ISBI 2016 challenge.Conclusions: For the first time we compared a CNN's diagnostic performance with a large international group of 58 dermatologists, including 30 experts. Most dermatologists were outperformed by the CNN. Irrespective of any physicians' experience, they may benefit from assistance by a CNN's image classification.Clinical trial number: This study was registered at the German Clinical Trial Register (DRKS-Study-ID: DRKS00013570; https://www.drks.de/drks_web/). (Less)

Clinically we observe a symmetric pigmented lesion on the back of an octogenarian man. The lesion appeared 6 years previously and has grown in diameter. On the physical exam, this patient has multiple nevi (more than 50). The dermatoscopy shows the presence of a pigmented lesion with starburst pattern, which is pathognomonic of a spitzoid lesion, and specifically we see peripheral globules (double row of peripheral globules). Following the algorithm of management of spitzoid lesions, described by Lallas et al. [1], we must excise this lesion to rule out melanoma, because this patient is older than 12 years. The biopsy revealed the presence of a spitzoid melanoma (200 microns).

Consider the diagnosis of a trichoepithelioma in a lesion that may resemble basal cell carcinoma (BCC) but exhibits a translucent background with blue-gray dots and globules at the periphery and subtle arborizing vessels.

Background Actinic keratoses (AKs) are dysplastic proliferations of keratinocytes. Studies evaluating nonfacial dermatoscopic pattern of AKs are scarce. Objective This study aimed to evaluate the dermatoscopic patterns of AKs located in nonfacial sites and to compare their patterns with facial lesions. Materials and methods Patients with concomitant facial and nonfacial AKs were recruited to participate and evaluated by clinical and dermatoscopic images of their AKs. Results Sixty-eight patients were included in the study. A total of 258 nonfacial AKs and 68 facial AKs were analyzed. The most frequent nonfacial AK dermatoscopic structures were white opaque scales (97.3%) and erythema (57.4%). When analyzed in combination, white scales plus erythema were found in 55.4% of nonfacial AKs. Pigmented structures were observed in 22.5% nonfacial AKs. Homogeneous brown pigmentation was the most prevalent pigmented structure in nonfacial pigmented AK (pAK) (93.1%). There was a positive association between patients having concomitant pigmented facial and nonfacial AKs (p Conclusion The combinations of erythema and white opaque scales or yellow opaque scales and homogeneous pigmentation are suggestive, respectively of nonpigmented and pigmented nonfacial AKs. Pigmented AKs occur concomitantly in facial and nonfacial areas.