The sole purpose of this article is to serve as a reminder that a struma may reside within an ovary and, on an extremely rare occasion, may actually be hyperfunctioning. Perhaps no field in modern medicine has been subjected to such diligent research as has that of thyroidology. The refinements in diagnostic techniques represent the utmost in ingenuity and intellectual achievement. However, unless the physician generates a spark of suspicion concerning the possibility of a lesion, these diagnostic tools may gather rust for want of a stimulus to put them to good use. In retrospect, reflecting on several of our own cases, the diagnosis should have been so simple as to make this topic scarcely worth mentioning. However, rarely does a condition suffer from such lack of attention as the one which forms the basis of this report. It is to be hoped that with the widespread adoption of radioactive