Hyperglycemia as a paraneoplastic endocrinopathy in renal cell carcinoma: a case report and review of the literature.

A case of renal cell carcinoma presenting with severe hyperglycemia, ketoacidosis, and hyperosmolar coma is described. Hyperglycemia was difficult to control but improved dramatically after nephrectomy and required no further insulin therapy. Hyperglycemia as a paraneoplastic endocrinopathy in renal cell carcinoma is suggested.