title: Choroid plexus papilloma: a clinicopathological study of 23 cases.
abstract: BACKGROUND
  Choroid plexus papillomas (CPPs) are rare, accounting for less than 1% of all intracranial tumors in adults. However, they are relatively more common in childhood and constitute 1.5 to 4% of intracranial tumors.
  
  
  METHODS
  They are most often located in the lateral ventricle, followed by the fourth and third ventricles and, rarely, in the cerebellopontine angle. The radiological appearance of a CPP as a cyst with a mural nodule is a curiosity. Bone formation is rare in CPPs and only 6 cases have been described in the literature. Neuromelanin production is also extremely rare and only 2 cases have been reported to date.
  
  
  CONCLUSIONS
  In the present communication, 23 cases of CPP are analyzed and rare clinical, pathological, and radiological features are described.
authors.affiliation: Department of Pathology, All India Institute of Medical Sciences, New Delhi.
authors.forename: C
authors.initials: C
authors.lastname: Sarkar
authors.forename: M C
authors.initials: MC
authors.lastname: Sharma
authors.forename: S
authors.initials: S
authors.lastname: Gaikwad
authors.forename: C
authors.initials: C
authors.lastname: Sharma
authors.forename: V P
authors.initials: VP
authors.lastname: Singh
mesh_terms: D000293:Adolescent; D000328:Adult; D002114:Calcinosis; D002648:Child; D002675:Child, Preschool; D016545:Choroid Plexus Neoplasms / Q000737:chemistry / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D005260:Female; D005910:Glioma / Q000737:chemistry / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D006801:Humans; D007223:Infant; D008297:Male; D008543:Melanins / Q000032:analysis; D008875:Middle Aged; D009999:Ossification, Heterotopic; D014057:Tomography, X-Ray Computed
chemical_list: D008543:Melanins