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Papers of the Week


2022 Apr 29


Clin Nucl Med

Retroperitoneal Chronic Expanding Hematoma Mimicking Malignancy on FDG PET/CT.

Authors

Narita H, Takenaka J, Watanabe S, Abe T, Kudo K
Clin Nucl Med. 2022 Apr 29.
PMID: 35485848.

Abstract

A 49-year-old Japanese man had a chief complaint of left hypochondrium pain, and a CT scan revealed a mass in the left retroperitoneal space. CT and MRI scans revealed a hemorrhagic component and surrounding fibrous tissues. FDG PET/CT images showed increased uptake in the peripheral rim of the mass, indicating a malignant tumor. The SUVmax was 7.6. We surgically resected the mass. The pathological examination confirmed the diagnosis of chronic expanding hematoma. It is difficult to differentiate CEH from malignant tumors on imaging; this should be recognized as a diagnostic pitfall.