title: Malignant proliferating trichilemmal cyst of the scalp: histological aspects and nosology.
abstract: BACKGROUND
  Malignant proliferating trichilemmal cyst is a rare tumour usually located on the scalp of elderly women. About 40 cases of malignant proliferating trichilemmal tumour have been documented.
  
  
  METHODS
  We report a case of a malignant proliferating trichilemmal cyst of the scalp in a 57-year-old woman. On the vertex she had a voluminous vegetated and multinodular tumour measuring 7 x 5 cm with spontaneous and abundant bleeding, and another lesion of the scalp corresponding to a trichilemmal cyst. Based on histopathological findings, the case was diagnosed as malignant proliferating trichilemmal cyst.
  
  
  CONCLUSIONS
  Diagnostic, clinicoprognostic and histological features of this tumour are discussed. Treatment is not yet standardized given its rarity.
authors: Department of Dermatology, Charles Nicolle Hospital, Tunis, Tunisia. aida.khaled@rns.tn
authors: A
authors: A
authors: Khaled
authors: M
authors: M
authors: Kourda
authors: B
authors: B
authors: Fazaa
authors: J
authors: J
authors: Kourda
authors: S
authors: S
authors: Ben Jilani
authors: M Ridha
authors: MR
authors: Kamoun
authors: R
authors: R
authors: Zermani
mesh_terms: D001706:Biopsy; D002294:Carcinoma, Squamous Cell / Q000473:pathology*; D002471:Cell Transformation, Neoplastic / Q000473:pathology; D005260:Female; D018859:Hair Follicle / Q000473:pathology*; D006801:Humans; D008875:Middle Aged; D012535:Scalp / Q000473:pathology*; D012878:Skin Neoplasms / Q000473:pathology*