RESUMO
An uncommon case of pneumoperitoneum without peritonitis, related to small bowel diverticulosis is presented. Pneumoperitoneum is usually a life-threatening incident, most frequently attributed to a perforated viscus and generally requiring emergency surgery. Non surgical pneumoperitoneum, however, is known to be caused by a variety of pathological and non pathological entities. Small bowel diverticulosis is an extremely rare cause of chronic pneumoperitoneum without peritonitis. In the presence of mechanical bowel obstruction, the latter kind of pneumoperitoneum can suddenly become impressively increased. A conservative attitude is generally advocated in the presence of such a benign pneumoperitoneum. However, laparoscopic exploration may be helpful for the diagnosis.