Sneddon-Wilkinson disease (SWD) or subcorneal pustular dermatosis is considered a rare pustular skin disease with chronic relapsing course. An association between SWD and other chronic conditions, such as IgA or IgG monoclonal gammopathy of undetermined significance (MGUS), IgA myeloma, pyoderma gangrenosum, thyroid gland disorders, and neoplastic diseases other than MGUS/myeloma, is known. We describe the case of a 92-year-old male patient with SWD and a concurrent IgG MGUS who had been treated with systemic betamethasone, topical mometasone furoate, and methylprednisolone aceponate, with a complete and durable resolution of symptoms and skin lesions without side effects. Systemic and topical steroids were very effective and well tolerated in our patient. This is the second case reported in the literature on the efficacy of a corticosteroid regimen in SWD in a fragile patient. This therapeutic approach (instead of dapsone therapy) has been used due to its relatively good safety profile.

Psoriasis is a chronic immune-mediated disease affecting 125 million people worldwide. 1 At least 65% of psoriasis patients experience an episode of genital psoriasis 2 but exclusively genital localization is rare (2%-5% of all patients). 3 About two thirds of patients report that they have never applied therapies and often there is no discussion of a specific strategy of treatment for the site traditionally considered difficult to treat. 2 Genital psoriasis has a deleterious impact on quality of life, is often considered an obstacle for a stable relationship and 80% of patients believe that their pathology is underestimated. Itching is considered the most common symptom, pain or dyspareunia are reported in 20% of cases, especially in women. Patients often develop depression, with career repercussions. 4 Combinations of steroids are used as topical therapies, secondarily dithranol, pimecrolimus or tacrolimus are also available. 2

In the last decades, the concept of adipose organ has emerged, giving adipose tissue an active endocrine and immunologic function through the secretion of multiple cytokines and chemokines that seem to be implicated in the development and progression of several cancer, including cutaneous melanoma. In this pilot experimental study, we analyzed the expression in the peritumor subcutaneous adipose tissue of the most significant adipokines involved in the processes of carcinogenesis and metastasis in a population of melanoma patients and in two control groups composed of melanocytic nevi and epidermoid cysts, respectively. We correlated the results obtained with the main disease prognostic factors observing a statistically significant increase in the expression of PAI1, LEP, CXCL1, NAMPT, and TNF‐α at the level of the peritumor tissue of the melanoma samples compared to the control groups and a correlation of the same with the histopathological prognostic factor of melanoma. Our preliminary study shows that the overexpression of PAI1, LEP, CXCL1, NAMPT, and TNF‐α may contribute to the growth and to the local aggressiveness of cutaneous melanoma. It opens the hypothesis of a direct oncogenic role of subcutaneous adipose tissue and adipokines in the tumorigenesis of melanoma.

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