MGLSc is unequivocally a disease of the uncircumcised male; the adult peak is late in the fourth decade; dyspareunia is a common presenting complaint; non-specific histology requires careful interpretation; most men are either cured by topical treatment with ultrapotent steroid (50-60%) or by circumcision (>75%); effective and definitive management appears to abrogate the risk of developing penile squamous cell carcinoma; urinary contact is implicated in the pathogenesis of MGLSc; HPV infection and autoimmunity seem unimportant.
We review the key developments in our understanding of subcorneal pustular dermatosis (SCPD, also known as Sneddon-Wilkinson disease) over the past 50 years. SCPD is a rare, chronic, sterile pustular eruption that was first described by Sneddon and Wilkinson in 1956. The primary lesions are pea-sized pustules classically described as half-pustular, half-clear flaccid fluid blisters. Histologically the salient feature is a subcorneal accumulation of neutrophils, suggesting the presence of chemoattractants such as tumour necrosis factor (TNF)alpha in the uppermost epidermis. However, to date its exact pathophysiology is unknown. Cases in association with pyoderma gangrenosum, benign monoclonal IgA gammopathy and multiple myeloma are well documented. There are anecdotal reports of SCPD associated with other internal malignancies such as chronic lymphocytic leukaemia, thymoma, apudoma and epidermoid carcinoma of the lung. The treatment of choice is dapsone. Therapeutic alternatives include retinoids, phototreatment with psoralen ultraviolet (UV) A, broadband or narrow band UVB and corticosteroids. Anecdotal uses of tacalcitol, ketoconazole, azithromycin, tetracycline, minocycline, vitamin E, ciclosporin, colchicine, mizoribine, mebhydrolin, infliximab and adalimumab with mycophenolate mofetil have all been reported.
The trivalent TCR peptide in IFA vaccine represents a significant improvement in immunogenicity over previous TCR peptide vaccines and warrants investigation of its ability to treat MS.
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