T-cell receptor gene rearrangement in a patient with common acute lymphocytic leukemia.

Using a beta-chain cDNA probe of the T-cell receptor, we detected T-cell receptor gene rearrangement in leukemic cells from an adult patient with common acute lymphocytic leukemia (cALL). The leukemic cells expressed non-T, non-B cell marker profiles (CALLA+, J5+, Leu-1-, Leu-4-, Ia+, B1-, c-Ig mu- and TdT+). This is the first reported case of cALL with T-cell receptor gene rearrangement and/or deletion.