title: [Trichofolliculoma: a retrospective review of 8 cases].
abstract: BACKGROUND
  Trichofolliculoma is a rare benign tumor consisting of a pilosebaceous follicle hamartoma. While diagnosis of this condition is generally straightforward, fortuitous discovery of an atypical presentation can occur during histological examination of a biopsy or surgical sample.
  
  
  METHODS
  We report herein on 8 patients aged between 8 and 75 years illustrating the wide spectrum of clinical presentation of this lesion, for which there are numerous differential diagnoses in the event of atypical clinical (lack of central whitish hair plug) or topical features (extra-facial site). In our series, half of the patients displayed a clinically hairless lesion. Moreover, in one case, a patient presented abdominal trichofolliculoma.
  
  
  CONCLUSIONS
  Trichofolliculoma may be under-diagnosed in the general population as illustrated by the frequency of atypical hairless lesions.
authors: Cabinet de dermatologie, 8, rue Jules-Ferry, 33290 Blanquefort, France. Electronic address: mh.jegou@free.fr.
authors: M-H
authors: MH
authors: Jégou-Penouil
authors: Cabinet de dermatologie, 8, rue Jules-Ferry, 33290 Blanquefort, France.
authors: C
authors: C
authors: Bourseau-Quetier
authors: Ylioppilaiden terveydenhoitosäätiö YTHS, Töölönkatu 37 A, 00260 Helsinki, Finlande.
authors: S
authors: S
authors: Cajanus
authors: Cabinet de dermatologie, 21, avenue Foch, 54000 Nancy, France.
authors: J-L
authors: JL
authors: Rigon
authors: Cabinet de dermatologie, 9, rue Édouard-Branly, 92130 Issy-les-Moulineaux, France.
authors: M
authors: M
authors: Risbourg
authors: Department of dermatology, allergology and venereal diseases, University of Helsinki and Helsinki University Central Hospital, Skin and allergy hospital, P.O.Box 160, 00029 HUS, Helsinki, Finlande.
authors: N
authors: N
authors: Kluger
mesh_terms: D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D005497:Follicular Cyst / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D018295:Neoplasms, Basal Cell / Q000473:pathology*; D012189:Retrospective Studies; D012878:Skin Neoplasms / Q000473:pathology*; D055815:Young Adult
keywords: Trichofolliculoma; Trichofolliculome