23rd August 2023

A 70-year-old woman with a history of recurrent abdominal pain presents to A&E with severe, constant abdominal pain, vomiting, and abdominal distension

A 70-year-old woman with a history of recurrent abdominal pain presents to A&E with severe, constant abdominal pain, vomiting, and abdominal distension. A plain abdominal X-ray shows a whirl sign.

What is the most likely diagnosis?