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. 2013 Apr 10:3:83.
doi: 10.3389/fonc.2013.00083. eCollection 2013.

Peritoneal Mouse as Detected on (18)F-FDG PET-CT

Talha Allam  1 , Razi Muzaffar, Nghi C Nguyen, Medhat M Osman
Affiliations

Peritoneal Mouse as Detected on (18)F-FDG PET-CT

Talha Allam et al. Front Oncol. .

Abstract

We present the case of a 77-year-old male with a history of prostate cancer. Follow up PET-CT and contrast-enhanced CT demonstrated a small peritoneal loose body or "mouse" in the pelvis. This is an uncommon, benign, asymptomatic finding which is usually incidentally discovered. The significance of being aware of this entity is to distinguish it from metastasis, especially in patients with known abdominal and pelvic malignancies.

Keywords: PET-CT; colon cancer; epiploic appendage; loose body; peritoneal mouse.

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Figures

Figure 1
Figure 1
Contrast-enhanced CT demonstrates a well circumscribed round soft tissue density measuring 1.7 cm in the right hemipelvis adjacent to the sigmoid colon (white arrows).
Figure 2
Figure 2
PET/CT images demonstrate the soft tissue lesion has moved from the right to left hemipelvis (arrow) on low dose CT (left). The lesion demonstrated no metabolic activity on PET (center) and fused image (right).
See this image and copyright information in PMC

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