Cutaneous B cell pseudolymphoma treated with rituximab and methotrexate

Dermatol Online J. 2021 Sep 15;27(9). doi: 10.5070/D327955138.

Abstract

Cutaneous B cell pseudolymphoma (CBPL), or cutaneous lymphoid hyperplasia, is the most common pseudolymphoma. It typically responds well to local treatment and follows a benign course. Herein, we describe the unique case of a patient with CBPL that was refractory to a variety of treatments, with subsequent response to rituximab followed by methotrexate. This case explores the complex interplay of T and B lymphocytes, and the potential role of perifollicular T cells in treatment resistant CBPL. Further, it describes the additive therapeutic effect of rituximab and methotrexate to target both B cell and T cell populations in CBPL, a strategy already employed in a number of other conditions.

Publication types

  • Case Reports

MeSH terms

  • Aged
  • Antineoplastic Agents, Immunological / administration & dosage*
  • Antineoplastic Combined Chemotherapy Protocols / therapeutic use*
  • B-Lymphocytes / drug effects
  • Drug Resistance
  • Humans
  • Male
  • Methotrexate / administration & dosage*
  • Pseudolymphoma / drug therapy*
  • Pseudolymphoma / immunology
  • Rituximab / administration & dosage*
  • Skin / immunology
  • Skin / pathology
  • Skin Neoplasms / drug therapy*
  • T-Lymphocytes / drug effects

Substances

  • Antineoplastic Agents, Immunological
  • Rituximab
  • Methotrexate