Adult T-cell leukemia pathophysiology

Adult T-cell leukemia Microchapters
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Pathophysiology

A TLL is usually a highly aggressive non-Hodgkin's lymphoma with no characteristic histologic appearance except for a diffuse pattern and a mature T-cell phenotype. Circulating lymphocytes with an irregular nuclear contour (leukemic cells) are frequently seen. Several lines of evidence suggest that HTLV-1 causes ATLL. This evidence includes the frequent isolation of HTLV-1 from patients with this disease and the detection of HTLV-1 proviral genome in ATLL leukemic cells. ATLL is frequently accompanied by visceral involvement, hypercalcemia, lytic bone lesions, and skin lesions.