Lymphoma - B cell neoplasms
B cell lymphoma subtypes
ALK-positive large B cell lymphoma

Author: Nikhil Sangle, M.D. (see Authors page)

Revised: 2 March 2017, last major update March 2011

Copyright: (c) 2001-2017,, Inc.

PubMed Search: ALK-positive large B cell lymphoma

Cite this page: ALK positive large B cell lymphoma. website. Accessed March 30th, 2017.
Definition / General
  • Very rare neoplasm of immunoblast-like ALK-positive B cells that lacks the t(2;5) translocation characteristic of anaplastic large cell lymphoma
  • Originates from post germinal center B cells with plasma cell differentiation
Clinical Features
  • Male predominance; median age = 36 years
  • Mediastinal and nodal involvement common
  • Poor prognosis; median survival for stage III / IV = 11 months
Micro Description
  • Sinusoidal pattern of lymph node involvement; immunoblastic and plasmablastic cells with abundant cytoplasm and round pale nuclei with prominent nucleoli
Positive Stains
Negative Stains