Langerhans cell histiocytosis

Langerhans cell histiocytosis (LCH) is a systemic disease associated with the proliferation and accumulation (usually in granulomas) of Langerhans cells in various tissues.

Epidermoid cyst

Nontender, round and firm, but slightly compressible, intradermal or subcutaneous cyst measuring 0.5-5 cm in diameter. Epidermal cysts are intradermal or subcutaneous tumors, grow slowly and occur on the face, neck, back and scrotum. They usually appear at or around puberty, and as a rule an affected individual has one solitary or a few cysts.


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PMID (PMCID)
21279363
 MALE Child
Solitary infantile myofibromatosis of the cranial vault: case report.
Merciadri P, Pavanello M, Nozza P, Consales A, Ravegnani GM, Piatelli G, Gandolfo C, Cama A.
Childs Nerv Syst. 2011;27(4):643-7.
Imaging findings are not pathognomonic, and the differential diagnosis usually includes eosinophilic granuloma (Langerhans cell histiocytosis), osteomyelitis, metastasis, osteoblastoma, epidermoid cyst, hemangioma, fibrous dysplasia, fibrosarcoma, and meningioma.