Polycythemia Secondary to a Pheochromocytoma with Production of an Erythropoiesis Stimulating Factor by the Tumor

Abstract

1. Erythropoiesis stimulating activity has been demonstrated in the saline extract of 4 pheochromocytoma tumors and the serum from a 10-year-old boy with hypertension and polycythemia. 2. The erythropoietically active material was non-dialyzable and not lipid soluble.