title: Squamous cell carcinoma arising in an intradiploic epidermoid cyst.
abstract: A 71-year-old woman presented with the symptoms of a posterior cranial fossa mass. CT and MRI revealed a lytic lesion in the occipital bone and a tumour infiltrating the dura mater, venous sinuses and cerebellum. Histopathology demonstrated a moderately differentiated squamous cell carcinoma arising from a primarily intradiploic epidermoid cyst. Despite surgery and radiotherapy, the tumour progressed and the patient died 1 year later.
authors.affiliation: Department of Radiology, University Hospital, D-93042 Regensburg, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Bretschneider
authors.forename: U
authors.initials: U
authors.lastname: Dorenbeck
authors.forename: M
authors.initials: M
authors.lastname: Strotzer
authors.forename: M
authors.initials: M
authors.lastname: Roth
authors.forename: P
authors.initials: P
authors.lastname: Rümmele
authors.forename: R
authors.initials: R
authors.lastname: Buettner
mesh_terms: D000368:Aged; D001932:Brain Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D002294:Carcinoma, Squamous Cell / Q000000981:diagnostic imaging* / Q000473:pathology; D002471:Cell Transformation, Neoplastic; D018450:Disease Progression; D004814:Epidermal Cyst / Q000000981:diagnostic imaging / Q000473:pathology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D009361:Neoplasm Invasiveness; D009777:Occipital Bone / Q000473:pathology; D012888:Skull Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology; D014057:Tomography, X-Ray Computed