Image Diagnosis: Inferior Mesenteric Vein Thrombosis.

A 59-year-old man presented to the gastroenterology clinic with 2 weeks of worsening lower back pain. There was associated poor appetite, fatigue, night sweats, and chills. The patient's medical history was significant for well-controlled hypertension and sigmoid diverticulosis. The thrombosis probably resulted from inflammation in the adjacent diverticulum.