Primary retroperitoneal tumors are rare, usually malignant and of mesenchymal origin. Surgery is the treatment of choice and complete tumor excision is the main factor which determines the prognosis. They represent between 0.3 and 0.8% of all neoplasms.
The most frequent tumors are sarcomas in their different varieties (totaling 83.7%), mainly liposarcomas (6-20%) and leiomyosarcomas (8-10%); 85% of retroperitoneal tumors are malignant and, of these, about 50% are sarcomas.
The involvement of the inferior vena cava in different tumor processes has long represented a criterion of inoperability and unresectability.
Extirpative surgery of the entire lesion is the treatment of choice for retroperitoneal tumors, but it is not always possible due to the infiltrative commitment of vital structures, despite the possibility of large visceral resections (stomach, kidney, spleen, tail of the pancreas, duodenum, colon, abdominal cava, etc.) and in which case we will not talk about recurrence but about residual tumor.
The laparoscopic approach performed by a multidisciplinary team with experience and expertise can help establish a correct diagnosis and achieve a fine dissection of the lesion, even if it is in difficult anatomical regions.
The video shows a laparoscopic resection of a paracaval mass of unknown origin. This is the case of a 39-year-old female patient who presents with abdominal pain in the epigastrium and right hypochondrium with 2 weeks of evolution. She receives analgesic treatment without any improvement accompanied by vomiting of gastrobiliary content, exacerbation of pain (VAS of 9/10). Hematic biometrics and blood chemistry demonstrated normal results. Ultrasound, CT-scan of the abdomen, and magnetic resonance cholangiography showed a pericaval tumor of about 6 or 4cm, not compromising the inferior vena cava with intimate interphase. After an appropriate assessment by the multidisciplinary team, it is decided to perform a laparoscopic resection.
Operating time was 110 minutes with insignificant blood loss. The procedure is performed successfully without any complications. There were no intraoperative complications. Oral feeding was reintroduced on the first postoperative day and the patient was discharged on postoperative day 2, without complications. Histopathological examination revealed a low-grade leiomyosarcoma. 5 years of follow-up without adjacent lesions.