title: Malignant proliferating trichilemmal tumor of the scalp: a case report.
abstract: BACKGROUND
  Malignant proliferating trichilemmal tumor is a rare skin tumor that affects mainly older women. It mimicks differential squamous cell carcinoma and its biological behavior is unpredictable.
  
  
  OBJECTIVE
  To report on a new case of malignant proliferating trichilemmal tumor of the scalp and to describe the clinical and histopathologic findings.
  
  
  METHODS
  A tumor measuring 2 cm was surgically excised with a 0.5 cm conservative margin of normal tissue
  
  
  RESULTS
  Based on the histopathologic findings of tumor, this case was diagnosed as proliferating trichilemmal tumor of the scalp. Eleven months after tumor resection, the patient is free of disease.
  
  
  CONCLUSIONS
  Malignant proliferating trichilemmal tumor is a rare malignant lesion with an unpredictable biological behavior. After wide excision, long term clinical follow up of the patient for early diagnosis of metastases is judicious.
authors.affiliation: Department of Pathology, Farhat Hached hospital, Sousse, Tunisia. trabelsiamel@yahoo.fr
authors.forename: Amel
authors.initials: A
authors.lastname: Trabelsi
authors.forename: Wided
authors.initials: W
authors.lastname: Stita
authors.forename: Olfa
authors.initials: O
authors.lastname: Gharbi
authors.forename: Nesrine
authors.initials: N
authors.lastname: Kanani
authors.forename: Badreddine
authors.initials: B
authors.lastname: Sriha
authors.forename: Sadok
authors.initials: S
authors.lastname: Korbi
mesh_terms: D000368:Aged; D002277:Carcinoma / Q000175:diagnosis; D002455:Cell Division; D003937:Diagnosis, Differential; D005260:Female; D006258:Head and Neck Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D006801:Humans; D015603:Keratinocytes / Q000473:pathology; D018295:Neoplasms, Basal Cell / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D012535:Scalp / Q000473:pathology*; D012878:Skin Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery