What Lies Beneath: Cutaneous Involvement of Mantle Cell Lymphoma Underlying an Insect Bite-like Reaction

Lymphoma
11/08/2020

J Cutan Pathol. 2020 Aug 9. doi: 10.1111/cup.13843. Online ahead of print.

ABSTRACT

Mantle cell lymphoma (MCL) is an uncommon subtype of mature B-cell non-Hodgkin lymphoma characterized by specific morphologic, immunophenotypic, and genetic characteristics, namely the t(11;14)(q13;q32) chromosomal translocation with resultant cyclin D1 overexpression. MCL has a generally aggressive course and is often widely disseminated at the time of diagnosis. Skin involvement is exceedingly rare and is seldom the first manifestation of MCL. We present a case of mantle cell lymphoma in an


84-year-old man with cutaneous involvement as the first manifestation, discovered incidentally after biopsy of a persistent nodule believed to be an insect bite. This case not only serves to raise awareness of the possibility of MCL presenting in the skin but also to point out that MCL can have lesions with both an insect-bite-like reaction and a deeper dermal MCL infiltrate. This article is protected by copyright. All rights reserved.