title: False-positive subtraction scintigram of the parathyroid glands due to metastatic tumor.
abstract: A focus of increased uptake on a 201Tl minus 99mTc subtraction scintigram of the parathyroid glands was found in a patient with persistent hypercalcemia. This area was not caused by an abnormal parathyroid gland but by an enlarged lymph node containing metastatic tissue from an adenocarcinoma of the ovary.
mesh_terms: D000230:Adenocarcinoma / Q000000981:diagnostic imaging / Q000556:secondary*; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D008207:Lymphatic Metastasis / Q000000981:diagnostic imaging*; D008722:Methods; D008875:Middle Aged; D010051:Ovarian Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D010279:Parathyroid Diseases / Q000000981:diagnostic imaging*; D011868:Radioisotopes; D011877:Radionuclide Imaging; D013667:Technetium; D013793:Thallium
chemical_list: D011868:Radioisotopes; D013667:Technetium; D013793:Thallium