title: Post-traumatic leptomeningeal cyst mimicking a skull tumour in an adult.
abstract: A 53-year-old female presented with a post-traumatic leptomeningeal cyst manifesting as bulging of the scalp, dizziness and tinnitus. She had known of the bulging of her forehead for about 20 years. She had suffered an injury to the head in childhood. Brain CT revealed a bone cyst associated with a round bone defect in the left frontal bone, bulging of the very thin outer layer and the defective inner layer. She was treated surgically with a diagnosis of skull tumour, but only gray cystic membranous tissue was found. The dural defect was repaired with fascia and the bone defect with bone cement. Bulging of the skull in adults can be caused by a bone cyst originating from a skull fracture.
authors.affiliation: Department of Neurosurgery, Urayasu-Ichikawa Municipal Hospital, Urayasu, Chiba, Japan. df8a-krs@asahi-net.or.jp
authors.forename: A
authors.initials: A
authors.lastname: Kurosu
authors.forename: T
authors.initials: T
authors.lastname: Fujii
authors.forename: G
authors.initials: G
authors.lastname: Ono
mesh_terms: D016080:Arachnoid Cysts / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery; D006259:Craniocerebral Trauma / Q000150:complications; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008875:Middle Aged; D012888:Skull Neoplasms / Q000175:diagnosis*; D013997:Time Factors; D014057:Tomography, X-Ray Computed