Background: Aneurysms of the middle colic artery (MCAA) and its branches are exceedingly rare accounting for <3% of total visceral aneurysms. Very few MCAA cases have been reported in the literature with only three cases accounting for a diameter >4 cm.
Method: We describe the successful open repair with ligation of a 4.2 cm asymptomatic MCAA in a female patient through the gastrohepatic ligament taking meticulous caution to avoid injury of the pancreas. The postoperative period was uneventful and the patient was discharged from the hospital on the fifth postoperative day. At 1 month follow-up the postoperative computed tomographic angiography documented complete exclusion of the MCAA and absence of contrast agent in the sac both in the arterial and the venous phase.
Conclusion: While the endovascular treatment is the first-line option for visceral aneurysms, the open approach is still reserved for certain cases of hostile anatomy, challenging location and large size. Our case highlights the irreplaceable role of open surgery and underlines the collaboration between surgical specialties.
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