title: [Indolent lymphoma of the ear].
abstract: BACKGROUND
  In 2007, Petrella et al. identified a new entity: CD8 T-cell indolent lymphoma of the ear.
  
  
  METHODS
  A 40-year-old man presented a nodular erythematous and violaceous painless lesion on his right ear that had appeared four months earlier. Excision histology revealed a non-epidermotropic T-cell proliferation infiltrating the entire dermis and subcutis but with sparing of a grenz zone. The monotonous infiltrate was positive for CD8, CD3, CD5 and TIA-1, and negative for CD30, CD4, CD56, ALK and EMA. The Mib1 proliferation index was 20%. Lyme serology and PCR for EBV were negative. Additional examinations showed no extracutaneous involvement.
  
  
  CONCLUSIONS
  CD8+ indolent lymphoma is an entity first described in 2007 and reported in the literature in 15 patients. Lesions are located on the nose or external ear. It comprises a non-epidermotropic proliferation of CD8+ T lymphocytes negative for CD4, CD30, CD56, CD57, granzyme B and perforin. The Mib1 proliferation index is low. This new entity appears neither in the 2005 World Health Organization/European Organization for Research and Treatment of Cancer (WHO/EORTC) classification of cutaneous lymphomas nor in the WHO 2008 Classification of tumours of haematopoietic and lymphoid tissues. Surgical treatment or radiotherapy is sufficient, and unlike aggressive, epidermotropic CD8+ T lymphomas chemotherapy is not required.
authors.affiliation: Service de dermatologie, CHU de Brabois, rue du Morvan, 54500 Vandœuvre-lès-Nancy, France. audevalois4@yahoo.fr
authors.forename: A
authors.initials: A
authors.lastname: Valois
authors.forename: C
authors.initials: C
authors.lastname: Bastien
authors.forename: F
authors.initials: F
authors.lastname: Granel-Broca
authors.forename: J-F
authors.initials: JF
authors.lastname: Cuny
authors.forename: A
authors.initials: A
authors.lastname: Barbaud
authors.forename: J-L
authors.initials: JL
authors.lastname: Schmutz
mesh_terms: D000328:Adult; D004428:Ear Neoplasms / Q000473:pathology*; D006801:Humans; D016410:Lymphoma, T-Cell, Cutaneous / Q000473:pathology*; D008297:Male; D012878:Skin Neoplasms / Q000473:pathology*