Transplantation of primary explants of human tumour to mice treated with antilymphocyte serum.

Biopsies from 40 human tumours, obtained at operation, have been transplanted to mice treated with antilymphocyte serum (ALS); viable grafts were obtained from 6 tumours. A further 26 human tumours were transplanted to mice thymectomized as adults and treated with ALS; viable grafts were obtained in 6 cases.