Patients with CALLA-positive and CALLA- negative T-ALL had similar clinicopathologic features at diagnosis.

Results: Heterozygous dominant Fas mutations were detected in the polyclonal double- negative T cells from all six patients.

Donors were selected on the basis of weight and size matching, ABO compatibility, and negative T-cell cross-match.

ECG on admission showed remarkable QT prolongation, U waves, and negative T waves, which also gradually normalized.

In a panel of HTLV-I-transformed T cell lines analyzed, CD40 expression was highly elevated compared to HTLV-I- negative T cells.

A standard 12-lead electrocardiogram showed marked ST-segment elevation and negative T waves in leads V1 and V2.

Double- negative T cells (enriched for gamma delta T cell receptor positive cells) were found to be sensitive to PGE2 as well.

This virus infected CD4- negative T and B cells and fused with murine 3T3 cells that expressed human CXCR4 alone.

Two patients with apical HCM in this group had decreases in their QRS voltages and in the depths of their giant negative T waves.