J Korean Soc Radiol.  2016 Jan;74(1):66-70. 10.3348/jksr.2016.74.1.66.

Dedifferentiated Retroperitoneal Liposarcoma Presenting as Right Inguinal Hernia: A Case Report

• Kim JM
• Choi MH
• Lee SL
• Ku YM

• KMID: 2150465
• DOI: http://doi.org/10.3348/jksr.2016.74.1.66

Abstract

Retroperitoneal liposarcomas usually present as painless, slow-growing abdominal masses. When masses grow large enough to compress surrounding structures, symptoms may occur. Retroperitoneal liposarcoma clinically manifesting as inguinal hernia is a very rare entity; only 11 cases have been reported. Herein, we present radiographic features of a 37-year-old male with a painless palpable mass in the right groin that was identified as dedifferentiated retroperitoneal liposarcoma herniated through the right inguinal canal.

MeSH Terms

Adult
Groin
Hernia, Inguinal*
Humans
Inguinal Canal
Liposarcoma*
Magnetic Resonance Imaging
Male
Multidetector Computed Tomography
Retroperitoneal Neoplasms

Figure

• 

  Fig. 1 A 37-year-old male with a retroperitoneal dedifferentiated liposarcoma (DDL) extending into the right inguinal canal. A, B. Contrast-enhanced computed tomography (CT) with coronal reformatted images shows a large mass with a fatty component in the retro-peritoneum (thin arrows) extending into the right inguinal canal with a solid enhancing component (open arrow). Note the medial displacement of the inferior epigastric vessels (arrowhead). C. Axial contrast-enhanced CT demonstrates several ill-defined strands and a soft-tissue nodule with homogenous enhancement (open arrow) within the mass. Note the mass adjacent to and extending along the testicular vessels (arrowhead). D. Sagittal T2-weighted image of the retroperitoneal tumor extending into the right inguinal canal. The retroperitoneal component of the mass shows high signal intensity consistent with mature fatty tissue (white arrows), while the inguinal canal component shows intermediate signal intensity consistent with tumor tissue (black arrow). E, F. Coronal gadolinium-pentetic-acid-enhanced T1-weighted images demonstrate multiple tenuous septa (arrows) and a soft-tissue nodule with marked enhancement (open arrow) within the mass. G. On cross-section, the surgical specimen taken from the right inguinal canal is solid, with discrete intratumoral nodules of varying size and colors ranging from yellow to yellow-tan admixed with firm tan-gray areas corresponding to dedifferentiated foci (open arrows). H. The tumor shows an abrupt transition between the components of well-differentiated liposarcoma and DDL (hematoxylin & eosin, × 100).

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