title: Immunohistochemical differential diagnosis between lymphocytoma cutis and malignant lymphoma in paraffin-embedded sections.
abstract: A panel of monoclonal antibodies (Leucocyte Common Antigen [CD45], LN-1 [CDw75], LN-2 [CD74], LN-3, L-26, UCHL-1 [CD45RO] and MT-1) which identify B and T cell surface markers were applied to benign lymphocytoma cutis and malignant lymphoma of the skin in paraffin-embedded sections. In five cases of lymphocytoma cutis, both B and T cell markers were positive, consistent with the polyclonality of the proliferative lymphocytes. In contrast, in two cases of B cell lymphoma, only the B cell markers were positive, consistent with the monoclonality. Furthermore, the immunohistochemistry clarified lymph follicle structures of lymphocytoma cutis. These were occasionally not evident in routine hematoxylin and eosin stained sections. Thus an immunologic phenotyping study combined with other appropriate criteria for histologic evaluation and clonal gene rearrangement analysis appears to be useful in distinguishing reactive from neoplastic lymphoid lesions of the skin.
authors.affiliation: Department of Dermatology, Asahikawa Medical College, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Toyota
authors.forename: S
authors.initials: S
authors.lastname: Matsuo
authors.forename: H
authors.initials: H
authors.lastname: Iizuka
mesh_terms: D000368:Aged; D000911:Antibodies, Monoclonal; D001402:B-Lymphocytes / Q000276:immunology; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000473:pathology*; D008223:Lymphoma / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D016612:Paraffin Embedding; D012878:Skin Neoplasms / Q000473:pathology*; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D000911:Antibodies, Monoclonal