Erythrocytosis associated with thyroid tumor

A patient with erythrocytosis is described. No other evidence exists for polycythaemia vera or a known cause of secondary erythrocytosis in this patient, and management with phlebotomy resulted in temporary normalization of hematologic parameters. Subsequently a cold thyroid nodule was found which was then surgically removed and turned out to be a papillary carcinoma (phi 2 cm) at histologic evaluation. Following thyroidectomy hematologic remission was observed which is still maintained 15 months after surgery. It seems to be the first reported case of erythrocytosis associated with thyroid tumor. X