68 Ga-FAPI-04 PET/CT in a Small Sarcomatoid Renal Cell Carcinoma With Widespread Metastases.

Dong, Aisheng; Yang, Bo; Bai, Yushu; Zuo, Changjing · Clin Nucl Med · 2023

case_report · Level V

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Abstract

Sarcomatoid renal cell carcinoma is an uncommon high-grade malignancy with poor prognosis. We describe 68 Ga-FAPI-04 PET/CT findings in a patient with a small (1.8 cm in the maximum diameter) sarcomatoid clear cell renal cell carcinoma with widespread metastatic disease. Both the primary renal tumor and its metastases in bones, lymph nodes, adrenals, and liver showed increased 68 Ga-FAPI-04 uptake. The primary renal tumor showed hypovascularity on contrast-enhanced CT, mimicking papillary renal cell carcinoma. This case indicates FAPI PET/CT may be useful for detecting and staging of this unusual malignancy.

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