title: Fluid-fluid level in Langerhans cell histiocytosis of the skull.
abstract: We present a case of solitary eosinophilic granuloma in the skull of a 6-year-old Saudi boy. This osteolytic lesion has fluid-fluid level on CT and MRI. We are presenting a rare radiological finding of eosinophilic granuloma.
authors.affiliation: Department of Radiology, College of Medicine & King Khalid University Hospital, King Saud University, Riyadh, Kingdom of Saudi Arabia. Tel. +966 (1) 4671155.  Fax. +966 (1) 4671746.  E-mail: fbmbader@yahoo.com.
authors.forename: Fahad B
authors.initials: FB
authors.lastname: Albadr
authors.forename: Essam A
authors.initials: EA
authors.lastname: Elgamal
authors.forename: Ibrahim A
authors.initials: IA
authors.lastname: Alorainy
authors.forename: Hamdy H
authors.initials: HH
authors.lastname: Hassan