Rare "Burned-Out" Testicular Mixed Germ Cell Tumor on 18 F-FDG PET/CT.

Wu, Yu-Chin; Kao, Chia-Hung; Sun, Shung-Shung; Hsieh, Te-Chun · Clin Nucl Med · 2022

case_report · Level V

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Abstract

Spontaneous regression of testicular mixed germ cell tumor is rare and is also called burned-out testicular tumor. We herein present the case of a 20-year-old man who was initially diagnosed with metastatic embryonal carcinoma. 18 F-FDG PET/CT demonstrated apparent metastases in the lymph node regions and both lungs. A covert right testicular lesion was noted according to the features on the CT component of PET/CT, which was subsequently confirmed as burned-out testicular mixed germ cell tumor.

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