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Definition of Histiocytosis, sinus

Medically reviewed by Dr. Otari Nergadze, Neurosurgeon | Updated: January 2026

Histiocytosis, sinus: A type of histiocytosis in which the lymph nodes are the main site of histiocyte proliferation. The sinuses of the lymph nodes become filled with and distended by masses of
histiocytes.