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A Transplantable Leiomyosarcoma (HT-1) of the Hamster^*

( Department of Surgery, Tufts University School of Medicine, Cancer Research and Cancer Control Unit, Boston 11, Mass.)

A new, transplantable tumor of the Syrian golden hamster has been described. This tumor, a leiomyosarcoma, arose in a male hamster which had been previously implanted subcutaneously with a cholesterol pellet. It grows progressively in 100 per cent of the hosts following subcutaneous implantation. Metastases have been observed in several organs.

^* This investigation was supported in part by an institutional grant of the American Cancer Society and by a grant from the National Cancer Institute, National Institutes of Health, United States Public Health Service, and the Mass. Division of the American Cancer Society.

Received 2/15/57.