Right-Sided Aortic Arch with Aberrant Left Subclavian Artery–Kommerell’s Diverticulum: a rare case report from Enat Multi specialty clinic, North West Ethiopia, 2025

Introduction : Kommerell's diverticulum with a right-sided aortic arch is a rare congenital anomaly. It may be detected incidentally or present with symptoms due to compression of mediastinal structures. Rarely, it can present with rupture or aortic dissection. Diagnosis is confirmed through computed tomography (CT) or magnetic resonance angiography (MRA). Surgery is typically reserved for symptomatic cases. We report a case of a right-sided aortic arch with aberrant subclavian artery and Kommerell’s diverticulum confirmed by CT in a young woman presenting with chronic cough and retrosternal discomfort. Case Presentation: A 28-year-old woman presented with a 9-month history of dry cough, dyspnea, and dysphagia that began during her third months of pregnancy. Examination revealed differential blood pressures between arms. Chest X-ray showed a right-sided aortic arch displacing the trachea leftward. CT angiography confirmed a right-sided aortic arch with aberrant left subclavian artery originating from a Kommerell’s diverticulum. She was managed symptomatically and remains under follow-up. Conclusion: Right-sided aortic arch with Kommerell’s diverticulum may be asymptomatic or present with respiratory and gastrointestinal symptoms. Basic investigations like chest X-ray can aid in early suspicion. It should be considered in the differential diagnosis of chronic cough, dyspnea, and dysphagia.