A 47-year- old male patient was admitted to hospital reporting acute onset of severe left iliac fossa pain. Past medical history was unremarkable. Physical examination revealed abdominal tenderness and a slight elevation of body temperature. An abdominal ultrasound was requested.Sonographic examination of left iliac fossa demonstrated hypoechoic wall thickening of a colonic segment surrounded by ill defined hyperechoic pericolic fat changes and thickened gut wall with a target pattern.
Further evaluation of the findings was decided and a CT was performed.
What is the most likely diagnosis?