Benign cystic mesothelioma: false-positive iodine accumulation in a patient with oncocytic follicular thyroid carcinoma.
Whole-body (131I) scintigraphy (WBS) is used to detect residual or metastatic tissue during treatment of differentiated thyroid carcinoma in combination with thyroglobulin (Tg) and ultrasonography of the neck. It is a highly sensitive method, but there is a high rate of false positives. We report the case of a 52-year-old woman with false-positive iodine accumulation in a benign cystic mesothelioma discovered during treatment for a oncocytic follicular thyroid carcinoma (stage pT2 pNx Mx). This lesion was detected by WBS and confirmed by surgery and histopathologic analysis.
From the *Departments of Nuclear Medicine; and †Pathology, Institut Bergonié, Bordeaux, France.
Marie
M
Meyer
Yann
Y
Godbert
Isabelle
I
Soubeyran
Anne-Laure
AL
Cazeau
Francoise
F
Bonichon
D018263:Adenocarcinoma, Follicular / Q000000981:diagnostic imaging* / Q000556:secondary; D003937:Diagnosis, Differential; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D007457:Iodine Radioisotopes; D018261:Mesothelioma, Cystic / Q000000981:diagnostic imaging*; D008875:Middle Aged; D010534:Peritoneal Neoplasms / Q000000981:diagnostic imaging* / Q000556:secondary; D011877:Radionuclide Imaging; D013964:Thyroid Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology
D007457:Iodine Radioisotopes