FAPI Uptake in Malignant Ascites: A Case Report.

Sahafi, Pegah; Samadi, Mohammad Hadi; Fazeli, Zahra; Emadi-Torghabeh, Ali; Aghaee, Atena · Clin Nucl Med · 2026

case_report · Level V

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Abstract

We present a 69-year-old man with a history of renal cell carcinoma who previously underwent nephrectomy. He was referred to our department for 99m Tc-FAPI and 99m Tc-PSMA scans (under an investigational protocol) due to a newly diagnosed rising prostate-specific antigen (PSA) level and a suspected retroperitoneal mass of unknown origin. Notably, the patient had a known history of malignant ascites, and his 99m Tc-FAPI scan demonstrated increased radiotracer uptake within the abdominal cavity.

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