[Peculiar "appendicitis" turning out to be an internal hernia].

After abdominal muscle exercises a young man suffered from upper abdominal pains and vomiting. The pain moved to the lower abdomen and the abdominal wall hardened. Clinical picture and laboratory findings were in agreement with acute appendicitis, and the patient was operated. Unexpectedly the small intestine and the ascending colon appeared almost entirely gangrenous upon gridiron incision, and the surgical incision was widened. An extensive internal herniation was revealed, with the small intestine having protruded through the sigmoid mesentery, causing a disturbance of the blood circulation and necrosis of the bowel. Swift and sufficient resection of the bowel saved the patient's life.