title: Suprasellar colloid cyst: an unusual location.
abstract: BACKGROUND
  Colloid cysts are rare intracerebral lesions that are preferentially encountered within the third ventricle. There are only a few reports in which colloid cysts are described in other locations such as the fourth ventricle, brainstem, cerebellum, and suprasellar region.
  
  
  METHODS
  A young woman presented with headaches for 1 year and an episode of generalized tonic, clonic seizures 1 week ago. She had bitemporal visual field cuts on examination. Imaging showed an hyperdense suprasellar lesion that was isointense on T1-weighted magnetic resonance imagings, profoundly hypointense on T2-weighted images, and did not show any enhancement on contrast magnetic resonance study at follow-up. It showed no restriction on diffusion-weighted imaging. A pteronal craniotomy and total excision of the lesion was done and the patient recovered well with no further neurological deficits. Pathology was consistent with a colloid cyst.
  
  
  CONCLUSIONS
  Colloid cysts are rarely found in a suprasellar location. Such a rare diagnosis has to be considered in the differential diagnosis in patients who present with a suprasellar cystic lesion.
authors.affiliation: Department of Neurosurgery, Krishna Institute of Medical Sciences, Secunderabad, Andhra Pradesh, India. Electronic address: glphaniraj@yahoo.com.
authors.forename: Gurram Lokamanya
authors.initials: GL
authors.lastname: Paniraj
authors.affiliation: Department of Neurosurgery, Krishna Institute of Medical Sciences, Secunderabad, Andhra Pradesh, India.
authors.forename: Manas
authors.initials: M
authors.lastname: Panigrahi
authors.affiliation: Department of Neurosurgery, Krishna Institute of Medical Sciences, Secunderabad, Andhra Pradesh, India.
authors.forename: Agasti Krishna
authors.initials: AK
authors.lastname: Reddy
authors.affiliation: Department of Neuropathology, Krishna Institute of Medical Sciences, Secunderabad, Andhra Pradesh, India.
authors.forename: Satish
authors.initials: S
authors.lastname: Immaneni
mesh_terms: D000328:Adult; D020863:Central Nervous System Cysts / Q000473:pathology* / Q000601:surgery; D056364:Colloid Cysts / Q000473:pathology* / Q000601:surgery; D003399:Craniotomy; D038524:Diffusion Magnetic Resonance Imaging; D004830:Epilepsy, Tonic-Clonic / Q000209:etiology; D005260:Female; D006261:Headache / Q000209:etiology; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging; D019635:Neurosurgical Procedures; D020127:Recovery of Function; D020542:Third Ventricle / Q000473:pathology; D016896:Treatment Outcome; D014786:Vision Disorders / Q000209:etiology; D014794:Visual Fields
keywords: Colloid cyst; Enterogenous cyst; Rathkes' cleft cyst