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Retroperitoneal cystic mesothelioma is a very rare lesion. The pathogeny is unclear and establishing a preoperative diagnosis versus others retroperitoneal cystic lesions is difficult. Thus, with increasing experience in laparoscopic retroperitoneal surgery, the use of this approach for exploration of a retroperitoneal mass of unknown origin may provide an alternative to classic open surgery and all the benefits of laparoscopy. We present two cases treated laparoscopycally and review the literature., (Copyright © 2016 The Author(s). Published by Elsevier Ltd.. All rights reserved.)

The presence of biliary gallstones and surgical clips in the abdominal cavity after a laparoscopic cholecystectomy can cause complications, which even though they are uncommon, can be serious. We carried out a review of the various complications, their incidence, related risk factors, ways to deal with them and recommendations to reduce morbidity associated with the presence of ectopic material (gallstones and surgical clips) in the peritoneum.

Wandering spleen is an uncommon entity, characterized by the anomalous position of the spleen, caused by the absence or laxity of its suspensory ligaments. The most common symptoms are usually due to intermittent or complete torsion of the splenic pedicle with subsequent infarction. We report a case of torsion of a wandering spleen. Laparoscopic splenectomy was performed and recovery was uneventful. Although few cases of wandering spleen treated laparoscopically have been reported in the literature, laparoscopy has been demonstrated to be a safe technique for the treatment of this entity.

Laparoscopic cholecystectomy is the treatment of choice in symptomatic cholelithiasis. Despite its many advantages over the conventional laparotomic approach, accidental perforation of the gallbladder with spilled stones and bile leakage is frequent during this procedure. Complications from missed gallstones are uncommon, although they can sometimes lead to severe consequences. Great effort must be made to achieve laparoscopic retrieval of all the gallstones missed into the peritoneal cavity and conversion to an open procedure should be used only in selected cases. We report a case of subhepatic abscess as a late complication of a missed gallstone during a previous laparoscopic cholecystectomy.

Primary hepatic actinomycosis is a rare infection that can clinically be confused with hepatic pyogenous abscesses or neoproliferative processes. We present the case of a 71-year-old man who had previously undergone total gastrectomy for gastric adenocarcinoma. After 4 years of favorable clinical course he presented a space-occupying lesion in the right hepatic lobe. Diagnostic tests were nonspecific and the diagnosis was confirmed by histological study of a biopsy of the lesion obtained through laparotomy. Prolonged antibiotic treatment produced a complete response. The etiopathogenesis and diagnostic-therapeutic options of hepatic actinomycosis are reviewed.