Streptozotocin (1) is an antibiotic with antileukemic and diabetogenic activity in animals.'In human patients it has been used with success for the treatment of malignant insulinoma* and is being tested against the whole range of common tumor types. 3 Kidney damage is the most common and most severe of various toxic side ef-t This work was performed under the auspices of the Division of Cancer Treatment. National Cancer Institute, Sational Institutes ...