Scanning electron micrographs of HVS-immortalized T cells from a WAS patient (HVS-WAS1). The WAS T-cell lines are heterogeneous in size and morphology, showing all cells' conspicuous abnormalities. Cells with lamellar or bulbous morphology are represented in (a) and (b). Cells with elongated and aberrant shapes are depicted in (c), (d), and (e). (Original magnification × 8,000.)