Secondary non-hematopoietic cancers arising following treatment of hematopoietic disorders.

Aggressive treatment of neoplastic disease has resulted in improved survival and, in some cases, cure of the primary malignancy. One of the most serious complications of such anticancer treatment has been the occurrence of an acute leukemia (primarily non-lymphocytic) several years after the successful treatment of the original neoplasm. Within the last 12 years, the authors have encountered 26 individuals who developed a second non-hematopoietic malignancy (excluding skin cancers) following primary aggressive treatment of a hematopoietic malignancy. All individuals had been treated with chemotherapy (24 of 26 with alkylating agents). The secondary tumors included lung (7), colon (6), gastric (4), bladder (3), esophageal (3), rectal (2) and pancreatic (1) tumors. The average time to development of the second malignancy in this series was 55.1 months, and the survival period following the diagnosis of the second malignancy averaged 7.3 months. It may be that aggressive anticancer treatment may be responsible for the emergence of a host of second non-hematopoietic carcinomas in addition to the now well established association with induced acute non-lymphocytic leukemias.