sinus histiocytosis with massive lymphadenopathy

n.

A chronic disease that occurs in children and is characterized by massive painless cervical lymphadenopathy that is the result of distension of the lymphatic sinuses by macrophages containing ingested lymphocytes.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.