FALSE-POSITIVE METASTASIS - A FLOATER OF THYROID-TISSUE FROM ANOTHER PATIENT SUGGESTS MALIGNANCY

False-positive diagnoses of thyroid metastases are exceedingly rare. W e describe a patient who had a fine needle biopsy of a lymph node that suggested the diagnosis of a thyroid metastasis where the source of t he thyroid tissue was from another patient: tissue that had been left on the side of the tissue bath and had floated into the slide of our p atient.