title: Surgical treatment of intradiploic epidermoid cyst treated as depression.
abstract: BACKGROUND
  Extradural intradiploic epidermoid cysts are rare, representing less than 0.25% of all primary intracranial tumors. They can be neurologically silent and can only present psychiatric symptoms like depression, cognitive or personality changes.
  
  
  METHODS
  A 68-year-old male with two year long history of depressive mood, lack of motivation, helplessness, hopelessness and poor response to antidepressive drug therapy was described. CT scan showed a well-defined mass in the parietal scalp with destruction of the scull. He underwent intracranial tumor resection. Surgical resection and cranioplasty were performed. Pathology confirmed intradiploic epidermoid cyst.
  
  
  CONCLUSIONS
  Total removal of these cysts and repeated washing of the cavity with 0.9% saline may prevent recurrence and aseptic meningitis and may improve mental state of the patient. We also emphasize the need for neuroimaging studies in a patient with atypical changes in mental status, even without neurological signs or symptoms.
authors.forename: Nenad
authors.initials: N
authors.lastname: Zivković
authors.forename: Marko
authors.initials: M
authors.lastname: Marković
authors.forename: Goran
authors.initials: G
authors.lastname: Mihajlović
authors.forename: Milan
authors.initials: M
authors.lastname: Jovanović
mesh_terms: D000368:Aged; D003866:Depressive Disorder / Q000175:diagnosis*; D003937:Diagnosis, Differential; D004814:Epidermal Cyst / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D008297:Male; D012983:Soft Tissue Neoplasms / Q000175:diagnosis* / Q000601:surgery; D014057:Tomography, X-Ray Computed