Summary
A case of anomalous mesenteric artery is reported. The artery was incidentally cannulated during angiography of a patient with a left renal tumor. It arose from the abdominal aorta between the superior and inferior mesenteric arteries. The artery then ascended directly upwards from its origin and supplied the transverse colon replacing the middle colic branch of the superior mesenteric artery. The anomaly must be a result of a anomalous concentration of unpaired visceral arteries in the developing embryo. This type of anomaly is very rare and it would be appropriate to name the artery the middle mesenteric artery.
Résumé
Un cas d'anomalie de l'artère mésentérique est rapporté. L'artère a été cathétérisée incidentallement lors de l'angiographie d'une patient présentant une tumeur rénale gauche. Elle naissait de l'aorte abdominale entre l'artère mésentérique supérieure et l'artère mésentérique inférieure. Elle montait directement à partir de son origine pour se distribuer au colon transverse et remplacer la branche colique moyenne normalement issue de l'artère mésentérique supérieure. Cette anomalie est sûrement le résultat d'une concentration anormale des artères viscérales impaires et médianes existant pendant la période embryonnaire. Ce type d'anomalie est très rare et justifierait le nom d'artère mésentérique moyenne.
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Yoshida, T., Suzuki, S. & Sato, T. Middle mesenteric artery: an anomalous origin of a middle colic artery. Surg Radiol Anat 15, 361–363 (1993). https://doi.org/10.1007/BF01627894
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DOI: https://doi.org/10.1007/BF01627894