Ectopic Luteinizing Hormone Secretion and Anovulation

A 40-year-old woman referred for evaluation of markedly elevated levels of luteinizing hormone — identified in the course of an infertility workup — is the subject of this Brief Report. Investigation showed ectopic secretion of luteinizing hormone from a neuroendocrine pancreatic tumor, the removal of which led to the normalization of luteinizing hormone levels and the return of ovulation.