Duodenum Inversum in a Female: A Rare Clinical Entity Presenting With Right Hypochondrial Pain

Duodenum inversum is a rare congenital anomaly in which the proximal duodenum travels posteriorly and superiorly before crossing the midline, often presenting asymptomatically. Clinical features can include epigastric pain, nausea, and abdominal distension. This case report describes a 35-year-old female who presented with right hypochondrial pain. A CT scan revealed that the third part of the duodenum followed an upward and vertical course, crossing the midline at a higher level than usual, thus confirming the diagnosis of duodenum inversum. Despite the absence of obstruction, conservative medical management was employed to address the symptoms. This case highlights the importance of considering duodenum inversum in the differential diagnosis of right hypochondrial pain and underscores the value of modern imaging techniques in accurate diagnosis. Awareness of this rare condition can facilitate timely and effective management.