A Territory-Wide Follow-Up of Primary and Secondary Extramammary Paget Disease of 2 Decades: Effects of Local Disease on Survival.

Introduction: Extramammary Paget disease (EMPD) is an uncommon malignant cutaneous neoplasm that are divided into primary and secondary forms. In this multicenter study, histologically proven cases of primary and secondary EMPD were reviewed for clinical outcomes with subgroup analysis for secondary EMPD.

Methodology: Cases of EMPD were identified from pathology report of the involved institutions over a period of over 2 decades.

Increased histological severity and chronicity of interface inflammation in anti-MDA5 dermatomyositis-A comparative dermatopathological analysis.

Anti-melanoma differentiation-associated gene 5 (MDA5) dermatomyositis is characterized by serological detection of anti-MDA5 antibody and rapidly progressive interstitial lung disease. In this study, the largest cohort of skin biopsies to date of anti-MDA5 dermatomyositis was reviewed and compared with cases of dermatomyositis with negative serology. Findings contribute to the histological diagnosis and evaluation of the severity of cutaneous inflammation in anti-MDA5 dermatomyositis.

A rare presentation of pemphigus vegetans as an isolated vegetative lesion-Review of histopathological clues and treatment effects in multiple biopsy specimens.

Background: Pemphigus is a group of immunobullous dermatoses characterized by the presence of autoantibodies directed against adhesion molecules of keratinocytes, with pemphigus vegetans being the rarest form, accounting for 1%-2% of all cases of pemphigus. Pemphigus vegetans is characterized by verrucous vegetative lesions in addition to vesiculobullous lesions.

Methods: We report a rare case of pemphigus vegetans presenting as an isolated vegetative lesion in the groin 3 months prior to the development of blisters.

Trichothiodystrophy in a child with occult learning disorder.

Trichothiodystrophy (TTD) is an autosomal recessive condition characterized by brittle and sparse sulfur deficient hair. The disorder is due to a known genetic mutation in DNA nucleotide excision repair (NER) in up to 83% of cases. We describe a 13-month-old girl presenting with hair fragility and hair loss since age 3 months, and discuss the overlap between TTD and other NER diseases.