Arthritis with nodular skin lesions

A rheumatology consult was taken for a 22-year-old man admitted with acute pancreatitis who developed nodular skin lesions over both shins and joint pains in the ankles, knees, and wrists. The patient had a history of mild dull aching, epigastric pain for 1 year; and presented with fever for 1 month with dyspnoea. In the hospital, blood tests showed raised amylase (1997 units per L) and lipase (889 units per L). MRI of the abdomen (figure 1A)...