**9.1 Clinical parameters**

The clinical presentation of CAL is varied from sudden and aggressive sepsis with multisystemic organ failure to an insidious progression, such as an extended postoperative ileus. Nonspecific signs and symptoms may anticipate a fast and often abrupt clinical deterioration or an unrecognized subclinical CAL. This last situation can respond to 50% of the total CAL. In those circumstances, additional imaging is necessary to establish the diagnosis.
