The palpable mass over the groin region include inguinal or femoral hernia, enlarged lymph nodes, aneurysm or pseudoaneurysm, synovial cyst and iliopsoas ganglion. Among these diagnoses, patients with femoral hernia are at risk of bowel obstruction or strangulation; so it should be treated as an emergency. Ultrasound and magnetic resonance imaging (MRI) are helpful for differential diagnosis. We report a case with a large iliopsoas ganglion located around the distal iliopsoas muscle and tendon with pseudopodia extending close to the joint capsule, mimicking femoral hernia clinically. The patient underwent excision and no recurrence was noted at one-year follow-up.
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