title: [Lipofibromatosis in the finger of a child].
abstract: BACKGROUND
  Lipofibromatosis is a recently classified form of benign tumor in children; it is of non-specific clinical presentation and is seen mainly on the extremities. We report a case involving the index finger of a child.
  
  
  METHODS
  An 8-year-old boy consulted for a nodule on the palmar surface of the left index finger that had appeared 6 months earlier. The nodule, which adhered to the deeper skin, measured 1cm in diameter and was bluish and firm on palpation. Histological examination of the resected specimen revealed fatty tissue associated with a proliferation of spindle cells. Immunohistochemical analysis showed that certain of these cells expressed smooth muscle actin, suggesting partial myofibroblastic differentiation. A diagnosis of lipofibromatosis was made.
  
  
  CONCLUSIONS
  Lipofibromatosis is a rare tumor. The main problem in terms of severity is its locally invasive development, which frequently causes problems for resection. Due to the age at onset, its course with deep invasion, the frequency of recurrence and the histological aspect, lipofibromatosis is classed as a form of childhood fibromatosis.
authors.affiliation: Service de dermatologie, hôpital Ambroise-Paré, Assistance publique-Hôpitaux de Paris, université Versailles-Saint-Quentin-en-Yvelines, 9 avenue Charles-de-Gaulle, Boulogne-Billancourt, France. emmanuel.mahe@apr.aphp.fr
authors.forename: E
authors.initials: E
authors.lastname: Mahé
authors.forename: S
authors.initials: S
authors.lastname: Guéro
authors.forename: S
authors.initials: S
authors.lastname: Fraitag
mesh_terms: D000199:Actins / Q000032:analysis; D014408:Biomarkers, Tumor / Q000032:analysis; D002648:Child; D003937:Diagnosis, Differential; D005350:Fibroma / Q000737:chemistry / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D005385:Fingers / Q000473:pathology*; D006801:Humans; D008067:Lipoma / Q000737:chemistry / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D008297:Male; D009363:Neoplasm Proteins / Q000032:analysis; D012983:Soft Tissue Neoplasms / Q000737:chemistry / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery
chemical_list: D000199:Actins; D014408:Biomarkers, Tumor; D009363:Neoplasm Proteins