Xanthogranuloma is a form of histiocytosis, an excess of histiocytes, with yellow lesions.
xanthogranuloma
I will provide 8 conditions in the human body that begin with the letter "X:" 1. Xanthemia - carotenemia; 2. xanthinuria - the excretion of large amounts of xanthine in the urine; 3. xanthochromia - patches of yellow skin on the body; 4. xanthogranuloma - infiltration of lipid in the retroperitoneal tissue; 5. xenophthalmia - inflammation in the eye by a foreign object; 6. xerasia - dry and brittle hair on the scalp; 7. xerophthalmia - excessive dryness of the eye; and 8. xerostomia - dryness of the mouth.