title: Primary subcutaneous B-cell lymphoma: case report and literature review.
abstract: Primary cutaneous B-cell lymphomas are defined as malignant B-cell proliferations presenting with cutaneous involvement alone and no evidence of extracutaneous manifestations when complete staging has been performed. It has been shown that the infiltrate in some cases could involve the underlying subcutaneous tissues, but primary localization in this compartment has been rarely reported. We describe here the case of a 53-year-old woman who noticed a nodular lesion on the left shoulder that rapidly enlarged in a few months. The histological and immunophenotypical features were compatible with a subcutaneous B-cell lymphoma. The tumoural mass was confined predominantly to the subcutaneous compartment, as confirmed by computed tomography. No other tumour localizations were found. Thus, primary B-cell lymphoma of the subcutis was diagnosed. We report a review of the literature indicating that B-cell lymphomas that are primarily localized to the subcutaneous tissues represent a very rare modality of presentation with a biological behaviour different from conventional cutaneous B-cell lymphoma.
authors.affiliation: Unit of Dermatology, University of Padua, Via Cesare Battisti 206, Padua, Italy. mauro.alaibac@unipd.it
authors.forename: Mauro
authors.initials: M
authors.lastname: Alaibac
authors.forename: Matteo
authors.initials: M
authors.lastname: Bordignon
authors.forename: Natale
authors.initials: N
authors.lastname: Pennelli
authors.forename: Savina
authors.initials: S
authors.lastname: Aversa
authors.forename: Cleto Veller
authors.initials: CV
authors.lastname: Fornasa
authors.forename: Vanna
authors.initials: V
authors.lastname: Chiarion
mesh_terms: D005260:Female; D006801:Humans; D016393:Lymphoma, B-Cell / Q000473:pathology*; D008875:Middle Aged; D012782:Shoulder; D012878:Skin Neoplasms / Q000473:pathology*; D040521:Subcutaneous Tissue