title: Mycosis fungoides and chronic lymphocytic leukaemia--composite T-cell and B-cell lymphomas presenting in the skin.
abstract: Composite lymphomas involving cutaneous B-cell and T-cell lymphomas are very uncommon. We report here the unique circumstance of a patient with mycosis fungoides (primary cutaneous T-cell lymphoma) who later developed chronic lymphocytic leukaemia (B-cell lymphoproliferation, B-CLL), which presented in the skin (leukaemia cutis) as a composite lymphoma affecting an earlobe. The presence of both lymphoproliferative disorders was confirmed with immunophenotyping and the finding of both immunoglobulin gene rearrangements and T-cell receptor gene rearrangements in the ear and the same T-cell receptor gene rearrangement in a plaque lesion of mycosis fungoides on the arm.
authors.affiliation: Division of Dermatology, Department of Medicine, Royal University Hospital, Saskatoon, Saskatchewan, Canada S7N 0W8. hullp@attglobal.net
authors.forename: P R
authors.initials: PR
authors.lastname: Hull
authors.forename: A
authors.initials: A
authors.lastname: Saxena
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005500:Follow-Up Studies; D006801:Humans; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000473:pathology*; D017254:Leukemic Infiltration / Q000473:pathology*; D008297:Male; D009182:Mycosis Fungoides / Q000473:pathology*; D016609:Neoplasms, Second Primary / Q000473:pathology*; D012867:Skin / Q000473:pathology; D012878:Skin Neoplasms / Q000473:pathology*