No abstract

Epstein-Barr virus (EBV)-positive mucocutaneous ulcer was recently described as a clinicopathologic entity occurring secondary to iatrogenic or age-related immune suppression. The histopathology of EBV-positive mucocutaneous ulcer reveals a polymorphous infiltrate including atypical large B-cells and Reed-Sternberg-like cells which are CD20-positive, CD30-positive and EBV-positive. The disorder follows an indolent and self-limited course. We report a case of EBV-positive mucocutaneous ulcer secondary to prolonged use of azathioprine for the treatment of pemphigoid and highlight the need for recognition of this disorder by dermatopathologists and dermatologists.

Wong-type dermatomyositis (DM) is a rare variant characterized by keratotic follicular papules that may mimic pityriasis rubra pilaris. Histopathologic examination shows follicular and non-follicular epidermal invaginations filled with keratin. The diagnosis is often delayed. Twenty-four cases of Wong-type DM have been reported thus far in the literature. Herein, we report the clinical and histopathologic findings of three additional cases in order to raise awareness of the disorder.

Sézary syndrome (SS) is a rare subtype of cutaneous T-cell lymphoma marked by erythroderma, circulating neoplastic T cells, and poor prognosis. Its low incidence has made the study of its etiology, immunologic/molecular pathways, and effective treatments difficult. Because histopathology may be nonspecific in SS, microscopic findings must be correlated with the clinical presentation and the results of blood evaluation in order to make the diagnosis. Treatments that preserve, rather than compromise, the immune system are preferred.

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