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