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

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.

There is no specific amount of time for malignant tendencies to turn malignant. If they are going to become malignant, they will usually do so within months.

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

If it's benign, it's not malignant.

If it's malignant, it's not benign.