12 MCQs in Anatomy for NEET PG
Regarding the embryological rotation of the midgut during weeks 6–10 of gestation, all of the following statements are correct EXCEPT:
During normal intestinal rotation, the midgut rotates around the superior mesenteric artery (SMA) by how many degrees in a counterclockwise direction?
A 3-day-old male neonate born to a 28-year-old primigravida presents with bilious vomiting and abdominal distension. On examination, the abdomen is mildly tender without peritonitis. Plain abdominal X-ray shows a 'double bubble' sign. Upper GI contrast study reveals the duodenum crossing the midline from right to left, with the jejunum and ileum positioned on the right side of the abdomen. What is the embryological basis of this anomaly?
A 6-week-old infant born in Delhi presents with intermittent bilious vomiting and failure to thrive. Abdominal examination reveals visible peristaltic waves from left to right. Ultrasound shows the superior mesenteric artery (SMA) positioned to the left of the superior mesenteric vein (SMV). The child is afebrile and haemodynamically stable. What is the most appropriate next step in management?
Which anatomical finding best distinguishes normal gut rotation from incomplete (partial) rotation of the midgut?
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