title: Extranodal marginal zone B-cell lymphoma/maltoma of the lip in a child: case report and review of cutaneous lymphoid proliferations in childhood.
abstract: All forms of cutaneous lymphomas are rare in children. Extranodal marginal zone B-cell lymphomas (EMZBL)/mucosa-associated lymphoid tissue (MALT) lymphomas are unusual neoplasms in children and young adults. We report a case of an EMZBL/MALT lymphoma of the lip in a previously healthy 14-year-old boy without immunodeficiency, confirmed by immunohistochemistry and documentation of clonal rearrangement of the immunoglobulin heavy-chain gene. Additionally, we present a review of the differential diagnosis of skin and mucosal lymphoid proliferations in childhood.
authors.affiliation: Department of Pathology, Yale-New Haven Hospital, New Haven, CT 06520, USA.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Zambrano
authors.forename: Olga
authors.initials: O
authors.lastname: Mejía-Mejía
authors.forename: Carlo
authors.initials: C
authors.lastname: Bifulco
authors.forename: Joseph
authors.initials: J
authors.lastname: Shin
authors.forename: Miguel
authors.initials: M
authors.lastname: Reyes-Múgica
mesh_terms: D000293:Adolescent; D003937:Diagnosis, Differential; D015326:Gene Rearrangement, B-Lymphocyte, Heavy Chain; D006801:Humans; D007150:Immunohistochemistry; D008048:Lip Neoplasms / Q000235:genetics / Q000378:metabolism / Q000473:pathology*; D018442:Lymphoma, B-Cell, Marginal Zone / Q000235:genetics / Q000378:metabolism / Q000473:pathology*; D008297:Male; D016133:Polymerase Chain Reaction; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000473:pathology; D012878:Skin Neoplasms / Q000235:genetics / Q000378:metabolism / Q000473:pathology*