Failure of fixation → malrotation → Ladd’s bands across duodenum → duodenal obstruction + risk of midgut volvulus (twisting around SMA).
Master that framework, and you will not only pass – you will outthink the question writers. Embryology Questions Medical School
Neonate with bilious vomiting (green) → rule out malrotation until proven otherwise. Upper GI series shows “corkscrew” or “duodenal jejunal junction to the right of spine.” Failure of fixation → malrotation → Ladd’s bands