J Vet Sci.  2017 Dec;18(4):559-561. 10.4142/jvs.2017.18.4.559.

Intra-abdominal necrotic lipoma diagnosed by computed tomography as a paraprostatic cyst

Affiliations
  • 1Department of Veterinary Medical Imaging and Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea. mcchoi@snu.ac.kr

Abstract

A dog with a history of diarrhea and dyschezia exhibited an oval-shaped, soft-tissue opacity mass in the abdomen on radiographs. CT examination revealed a large fluid-filled structure displacing the urinary bladder, prostate, and colon. The mass had continuity with the prostate; therefore, it was tentatively diagnosed as a paraprostatic cyst. Cytologic examination was performed and the mass was considered a non-inflammatory cyst. However, after surgery, histopathologic examination revealed a necrotic, inflamed cystic lipoma. This case shows that unusual intra-abdominal lipomas may have a cystic appearance.

Keyword

diagnostic imaging; dogs; lipoma; paraprostatic cysts; surgery

MeSH Terms

Abdomen
Animals
Colon
Constipation
Diagnostic Imaging
Diarrhea
Dogs
Lipoma*
Prostate
Urinary Bladder

Figure

  • Fig. 1 Transverse computed tomography images (A and D, pre-contrast-enhanced; B and C, post-contrast-enhanced) of the abdomen reveal a large fluid-filled structure (−4 to 40 HU; HU, Hounsfield unit) with rim enhancement. The irregular enhanced prostatic parenchyma (*) contained multiple cysts and mineralization. Descending colon (arrow) and caudal vena cava (arrowhead) were compressed by the mass.

  • Fig. 2 Post contrast-enhanced CT sagittal (A), transverse (B), and dorsal (C) images. The fluid-attenuated lesion (*) displaced the urinary bladder (UB) and the left kidney. The lesion had continuity (white arrow) with the ventral aspect of the right lobe of the prostate (black arrow). Based on CT results, the large fluid-filled structure was a suspected paraprostatic cyst.


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