Contrast-enhanced 18F-FDG PET/MR showed low uptake (SUVmax 2.5) and mild heterogeneous enhancement in coronary sinus epithelioid hemangioendothelioma aiding malignancy exclusion.
Contrast-enhanced 18F-FDG PET/MR can be utilized to evaluate coronary sinus masses, demonstrating specific imaging features such as low uptake and heterogeneous enhancement in epithelioid hemangioendothelioma.
A 55-year-old woman underwent CT for abdominal distension, which incidentally revealed coronary sinus dilatation. The echocardiography showed a mass in the coronary sinus. Coronary CTA showed a slightly low-density mass in the coronary sinus without enhancement. Subsequently, contrast-Enhanced 18 F-FDG PET/MR was performed to exclude underlying malignancy, which revealed low uptake (SUVmax 2.5) and mild segmental heterogeneous enhancement in the tumor. Then the patient underwent surgery, and histopathologic examination revealed epithelioid hemangioendothelioma.
Xue et al. (2026) studied this question. Contrast-enhanced 18F-FDG PET/MR showed low uptake (SUVmax 2.5) and mild heterogeneous enhancement in coronary sinus epithelioid hemangioendothelioma aiding malignancy exclusion.