title: Morphological and immunological change in the predominant type of leukaemic cells in a patient with T-cell chronic lymphocytic leukaemia.
abstract: A case of T-cell chronic lymphocytic leukaemia is described. Intracerebellar tumour was demonstrated by the characteristic feature of contrast-enhanced computerized tomography and was evidenced by surgical procedure. Histological examination revealed lymphocyte infiltration in the cerebellum. Initially, the majority of leukaemic cells were mature, medium-sized lymphocytes with surface marker phenotype of E+, OKT3+, OKT4+, OKT6-, OKT8-. In the terminal stage, large atypical lymphocytes which were morphologically distinct from the original lymphocytes and had different surface marker phenotype of E+, OKT3+, OKT4-, OKT6-, OKT8+, Leu7+ became increasingly prominent. The remaining medium-sized lymphocytes were morphologically and immunologically unchanged. Subsequently, the disease developed to a more aggressive pattern and the patient died in spite of chemotherapy.
mesh_terms: D000328:Adult; D002528:Cerebellar Neoplasms / Q000150:complications / Q000473:pathology / Q000601:surgery; D005260:Female; D006801:Humans; D007945:Leukemia, Lymphoid / Q000150:complications / Q000000981:diagnostic imaging / Q000276:immunology / Q000473:pathology*; D008214:Lymphocytes / Q000276:immunology / Q000473:pathology; D013601:T-Lymphocytes / Q000276:immunology / Q000473:pathology; D014057:Tomography, X-Ray Computed