PMC5470439_01
Initial CT imaging of the mass, showing extension of the caudal tail into and through the inguinal canal.
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On imaging, she was found to have a right sided large retroperitoneal mass measuring 11.3 cm x 7.8 cm x 6.2 cm extending from the renal capsule down to and through the inguinal canal into the femoral triangle (Fig. 1, Fig. 2).
Post-operative MRI, day 14, showing large fluid collection (marked by two solid arrows) overlying the right illiacus muscle.
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Diagnostic MRI performed on post-operative day 14 revealed a fluid collection 7 x 6 x 1 cm with the anterior aspect of the right illiacus (Fig. 3) which under different circumstances could be worrisome for abscess, but given the patient's benign clinical presentation (afebrile, no leukocytosis) this was more consistent with inflammation and post-operative changes rather than infectious in origin.