Treatment of Adult T Cell Leukaemia by Extracorporeal Photochemotherapy.

Four patients with chronic or smouldering type adult T cell leukaemia (ATL) were treated by extracorporeal photochemotherapy (photopheresis). From 4 to 8 months after starting photo-pheresis, skin lesions with ATL cell infiltration began to disappear. Cell surface markers in three patients showed improvement. In one patient, a serial decrease of soluble interleukin-2 receptor levels (950 U/ml to 620) in the serum was observed after 4 months. This pilot study suggests that photopheresis may be successfully applied in ATL. It is still necessary to continue follow-up observations in these patients and to treat a larger number of cases, before definite conclusions can be drawn in the future.