PMC8559631_01
T2 coronal fat suppression (1) and T2 sagittal (1) images show dumbbell shape fat containing lesion extending from right retroperitoneal area to inguinal canal (white arrow) and suppressed fat in T2 coronal fat suppression image
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F1
Abdominopelvic magnetic resonance imaging (MRI) with and without contrast revealed a 150x77 mm large non-enhancing fat containing mass, suggestive of lipoma, located on the right side of pelvis extending along the anterior aspect of iliopsoas muscle (figure 1).
Large encapsulated retroperitoneal lipoma in right pelvic side extending towards inguinal canal
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F2
The mass had a lipoid appearance and consistency and was completely resected without rupture of capsule (figure 2).
A) Lipoma include mature adipocyte and specific capillary network. Size of mature fat cells differ insignificant from each other. Thin fibrous septa separating the lobules are observed (Low magnification). B: H&E stain with high Magnification
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F3
Lipoma was confirmed in the final pathology report which indicated mature adipocyte, specific capillary network and thin fibrous septa separating the lobules (figure 3).