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Introduction: Genital involvement is observed in approximately 60% of patients with psoriasis, presenting clinicians with formidable challenges in treatment. While new biologic drugs have emerged as safe and effective options for managing psoriasis, their efficacy in challenging-to-treat areas remains inadequately explored. Intriguingly, studies have shown that interleukin (IL)-17 inhibitors exhibit effectiveness in addressing genital psoriasis. Objectives: We aimed to determine the effectiveness profile of bimekizumab in patients affected by moderate-to-severe plaque psoriasis with involvement of genitalia. Methods: Bimekizumab, a dual inhibitor of both IL-17A and IL-17F, was the focus of our 16-week study, demonstrating highly favorable outcomes for patients with genital psoriasis. The effectiveness of bimekizumab was evaluated in terms of improvement in Static Physician's Global Assessment of Genitalia (sPGA-G) and Psoriasis Area and Severity Index. Results: Sixty-five adult patients were enrolled. Remarkably, 98.4% of our participants achieved a clear sPGA-G score (s-PGA-g=0) within 16 weeks. Moreover, consistent improvements were observed in PASI scores, accompanied by a significant reduction in the mean Dermatology Life Quality Index (DLQI), signifying enhanced quality of life. Notably, none of the patients reported a severe impairment in their quality of life after 16 weeks of treatment. In our cohort of 65 patients, subgroup analyses unveiled that the effectiveness of bimekizumab remained unaffected by prior exposure to other biologics or by obesity. Conclusions: Our initial findings suggest that bimekizumab may serve as a valuable treatment option for genital psoriasis. Nevertheless, further research with larger sample sizes and longer-term follow-up is imperative to conclusively validate these results.

Fabrizio Martora,1 Claudio Marasca,2 Sara Cacciapuoti,1 Federica Fariello,1 Luca Potestio,1 Teresa Battista,1 Massimiliano Scalvenzi,1 Matteo Megna1 1Section of Dermatology - Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy; 2Dermatology Unit, Medical Department, “Antonio Cardarelli” National Hospital, Naples, ItalyCorrespondence: Fabrizio Martora, Section of Dermatology - Department of Clinical Medicine and Surgery, University of Naples Federico II, Via Pansini 5, Naples, 80131, Italy, Tel +39 - 081 – 7462457, Fax +39 - 081 – 7462442, Email fabriziomartora92@libero.itBackground: The treatment of hidradenitis suppurativa (HS) has always been a real challenge for dermatologists; to date, adalimumab the only biologic drug approved for HS is adalimumab, an anti-tumor necrosis factor (TNF)-α drug, the approval of this drug dates to 2015, data provided by real life show an effectiveness rate of about 60% percent. Recently (31 October 2023) FDA approves secukinumab for moderate-severe HS. The treatment and management of HS is very challenging as available treatments are very limited and show very variable outcomes.Methods: We conducted a prospective monocentric study designed to evaluate the efficacy and safety of secukinumab treatment in HS patients in a real-life setting.Results: The initial cohort of patients recruited included 21 HS patients including 12 females and 9 males. About 57.1% of patients achieved the primary endpoint and recorded significant decrease in all the severity assessment scales (IHS4, DLQI and VAS pain scale) at week 16 and 52, when HiSCR reached 71.4%.Conclusion: The results of our study highlight that treatment with secukinumab in patients with severe HS who failed adalimumab may be a safe and effective therapeutic weapon.Keywords: hidradenitis suppurativa, secukinumab, adalimumab, treatments

Luca Potestio,* Fabrizio Martora,* Sara Cacciapuoti, Matteo Megna, Alessia Villani, Angelo Ruggiero Section of Dermatology - Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy*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

Luca Potestio, Giuseppe Lauletta, Nello Tommasino, Antonio Portarapillo, Antonia Salsano, Teresa Battista, Fabrizio Martora, Matteo Megna Section of Dermatology - Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, ItalyCorrespondence: Luca Potestio, Section of Dermatology - Department of Clinical Medicine and Surgery, University of Naples Federico II, Via Pansini 5, Naples, 80131, Italy, Tel +39 - 081 – 7462457, Fax +39 - 081 - 7462442, Email potestioluca@gmail.comAbstract: Psoriasis is a chronic inflammatory cutaneous disease with multifactorial pathogenesis involving both genetic and environmental factors as well as the innate and acquired immune response. Several triggering factors may exacerbate or worsen the disease. In this context, we performed a review manuscript with the aim of investigating current literature on psoriasis risk factors, also showing possible mechanisms by which they act on psoriasis. Globally, risk factors can be divided in classic risk factors (eg, mechanical stress, infections and dysbiosis of the skin, common drugs, environment and pollution, lifestyle, psychological stress, hormonal and metabolic alterations) which have long been known to be responsible for worsening and/or reoccurrence of psoriatic manifestations, and emerging risk factors (eg, biological drugs, immunotherapy for oncologic disease, Covid-19, and vaccines) defined as those newly identified risk factors. Accurate patient information and monitoring of risk factors as well as planned follow-ups may help to prevent and treat the worsening of psoriasis and consequently improve the quality of life of psoriatic patients.Keywords: psoriasis, flare, risk factors, pathogenesis

Matteo Megna,* Angelo Ruggiero,* Nello Tommasino, Claudio Brescia, Fabrizio Martora, Sara Cacciapuoti, Luca Potestio Section of Dermatology - Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy*These authors contributed equally to this workCorrespondence: Luca Potestio, 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 potestioluca@gmail.comAbstract: Tildrakizumab is a humanised IgG1/k-type monoclonal antibody that targets the p19 protein subunit of IL23. Despite its effectiveness and safety have been widely reported by clinical trials and real-life experiences, data regarding its use on patients who previously failed anti-IL17 (brodalumab, ixekizumab, bimekizumab and/or secukinumab) are scant. Therefore, further studies on this topic would be beneficial for clinicians in guiding the selection of biologic shifting, considering that anti-IL23, − 12/23, and -IL17 partially share their therapeutic targets. In this context, we performed a 28-week, single-center, real-life, retrospective study, with the aim of assessing the efficacy and safety of tildrakizumab in patients who previously failed anti-IL17, also focusing the attention on psoriasis located in difficult-to-treat areas (scalp, palms or soles, fingernails, genitals). A total of 23 patients (12 male, 52.2%; mean age 52.8 ± 12.4 years) were enrolled. Of these, 11 (47.8%) failed secukinumab, 7 (30.4%) ixekizumab, 3 (13.0%) brodalumab, 1 (4.3%) both secukinumab and ixekizumab and 1 (4.3%) bimekizumab. At baseline, mean PASI and BSA were 12.8 ± 5.9 and 18.7 ± 9.6, respectively. At W16 PASI75 and PASI90 response were achieved by 15 (65.2%), and 9 (39.1%) patients, respectively, whereas 19 (82.6%) and 13 (56.6%) subjects reached these scores at W28. One (4.3%) case of primary inefficacy and 1 (4.3%) c

Nello Tommasino, Matteo Megna, Sara Cacciapuoti, Alessia Villani, Fabrizio Martora, Angelo Ruggiero, Lucia Genco, Luca Potestio Section of Dermatology - Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, ItalyCorrespondence: Luca Potestio, 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 potestioluca@gmail.comAbstract: Teledermatology may be defined as the application of telemedicine to dermatology. According to published data, teledermatology is more widespread in Europe and North America, probably where resources for health care are greater than in other areas of the world. Indeed, teledermatology requires advanced technology to be efficient, as high image quality is necessary to allow the dermatologist to make correct diagnoses. Thanks to the recent advances in this field, teledermatology is become routinary in daily clinical practice. However, its use has been improved over time, overcoming several challenges. The aim of this narrative review is to retrace the almost 30-year history of teledermatology, to address the new challenges posed by advancing technologies such as artificial intelligence and the implications it may have on healthcare.Keywords: teledermatology, artificial intelligence, dermatology

Fabrizio Martora, Teresa Battista,* Luca Potestio,* Antonio Portarapillo, Nello Tommasino, Matteo Megna Section of Dermatology - Department of Clinical Medicine and Surgery, University of Naples Federico II, Napoli, Italy*These authors contributed equally to this workCorrespondence: Fabrizio Martora, 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 fabriziomartora92@libero.itAbstract: Managing HS has long posed a significant challenge for dermatologists. Adalimumab stands as the sole biologic drug sanctioned for HS, receiving approval in 2015 as an anti-tumor necrosis factor (TNF)-α drug. Real-life evidence over the years has debated its efficacy, suggesting a success rate hovering around 70%. However, the variability in existing treatments and the chronic-recurrent nature of the condition make its treatment and management exceedingly challenging. Hence, identifying new therapeutic targets for HS in the future becomes imperative. Recently, on October 31, 2023, the FDA approved secukinumab for moderate-severe HS, marking a significant development. There has been substantial discourse on the potential of anti-interleukin-23 drugs as new therapeutic avenues for treating HS in recent years. Here, we report a case of 17-year-old man successfully treated with Guselkumab. The results were confirmed at week 52.Keywords: hidradenitis suppurativa, anti-IL23, guselkumab, adalimumab, secukinumab

Luca Potestio,* Fabrizio Martora,* Giuseppe Lauletta, Ylenia Vallone, Teresa Battista, Matteo Megna Section of Dermatology - Department of Clinical Medicine and Surgery, University of Naples Federico II, Napoli, Italy*These authors contributed equally to this workCorrespondence: Luca Potestio, 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 potestioluca@gmail.comAbstract: Psoriasis pathogenesis is influenced by genetic factors and characterized by a complex interplay between genetic predisposition and various environmental triggers. These triggers set off metabolic processes involving inflammation, cell signaling, immune response dysregulation, and antigen presentation. Several types of innate and adaptive immune cells are involved in psoriasis. Among the cytokine cascade which leads to psoriasis development, the interleukin (IL)-23/Th17 axis, especially IL-17 production, emerges as crucial. Recognizing the pivotal role of this axis has facilitated the development of selective and effective biological drugs, such as anti-IL17 and anti-IL23 monoclonal antibodies. These drugs aim to achieve the complete or near-complete disappearance of psoriatic lesions, as indicated by PASI100 and PASI90 responses, respectively. In this context, the aim of our review was to delve into the functioning of the IL-23/Th17 axis, its dysregulation in psoriasis pathogenesis, and the therapeutic potential of its inhibition. Currently, 4 anti-IL17 (secukinumab, ixekizumab, bimekizumab and brodalumab) and 3 anti-IL23 (guselkumab, risankizumab and tildrakizumab) have been approved. All these drugs showed high levels of effectiveness in both clinical trials and real-life experiences, with an excellent profile in terms of safety. Certainly, furthers studies will allow for better characterization of biologics’ profile, in

Luca Potestio, Fabrizio Martora, Sara Cacciapuoti, Matteo Megna, Alessia Villani, Angelo Ruggiero Section of Dermatology - Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, ItalyCorrespondence: 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.it