A false-positive finding in therapeutic evaluation: hypermetabolic axillary lymph node in a lymphoma patient following FDG extravasation.
We report a case of a false-positive finding in FDG PET/CT following radiotracer extravasation. A 15-year-old male patient was referred for therapeutic evaluation status post-chemotherapy for a lymphoblastic lymphoma. FDG PET/CT showed discordant findings with a marked decrease in a liver/hepatic hilum uptake, disappearance of a subcutaneous left supraclavicular uptake, and appearance of intense right axillary nodal uptake. Extravasation in the right superior limb was noted. Comparison with the previous scan showed that the axillary nodes were present, measured less than 1 cm in their short axis, had not increased in size, and had a fatty hilum. We concluded that FDG uptake was caused by a migration in lymphatic vessels.
Nuclear Medicine Department, Purpan University Hospital, Place du Docteur Baylac, TSA 40031, 31059 Toulouse cedex 9, France. thomwagner@hotmail.com
Thomas
T
Wagner
Nicolas
N
Brucher
Anne
A
Julian
Anne
A
Hitzel
D000293:Adolescent; D001365:Axilla; D003951:Diagnostic Errors; D005119:Extravasation of Diagnostic and Therapeutic Materials; D005189:False Positive Reactions; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008198:Lymph Nodes / Q000000981:diagnostic imaging*; D008297:Male; D064847:Multimodal Imaging / Q000379:methods*; D049268:Positron-Emission Tomography; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000188:drug therapy; D019275:Radiopharmaceuticals; D014057:Tomography, X-Ray Computed
D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18