Chronic Abdominal Pain With Pus Discharge from the Umbilicus

Question: A 24-year-old man with a 3-month history of abdominal pain and pus discharge from his umbilicus presented to our outpatient clinic. He had no previous significant cardiovascular or gastrointestinal problems. He also denied allergies, surgery, or abdominal injury. He was febrile with vital signs within the normal range. Physical examination revealed pus discharge from his umbilicus and mild tenderness of his lower abdomen without...