Metastatic Lung Adenocarcinoma Presenting Within Struma Ovarii: A Rare Case of Tumor-to-Tumor Metastasis.

Maeng, Lee So; Shin, Ah Young; Choi, Eun Kyoung; Oh, Jin Kyoung; Chung, Yong-An · Clin Nucl Med · 2024

case_report · Level V

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Abstract

Tumor-to-tumor metastasis is extremely rare. We herein describe a 67-year-old woman who underwent FDG PET/CT for initial staging of lung cancer. This imaging examination revealed a pelvic mass with peripheral FDG uptake, suggesting a metastatic tumor from lung cancer or a secondary malignancy. Examination of a surgical specimen confirmed metastatic lung adenocarcinoma within a struma ovarii, suggesting tumor-to-tumor metastasis.

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