Xanthogranuloma is a form of histiocytosis, an excess of histiocytes, with yellow lesions.

Phospholipids

Histiocytosis X is a generic term that refers to an increase in the number of histiocytes, a type of white blood cell, that act as scavengers to remove foreign material from the blood and tissues.

eosinophilic granuloma, Hand-Schuller-Christian disease and Letterer-Siwe disease.

substances called cytokines and prostaglandins, which are normally produced by histiocytes and act as messengers between cells