1 Иркутская государственная медицинская академия последипломного образования -филиал ФГБОУ ДПО «Российская медицинская академия непрерывного профессионального образования» Минздрава России (664049, г. Иркутск, Юбилейный, 100, Россия) 2 ГБУЗ «Областной онкологический диспансер» (664035, г. Иркутск, ул. Фрунзе, 32, Россия) 3 ФГБОУ ВО «Иркутский государственный медицинский университет» Минздрава России (664003, г. Иркутск, ул. Красного Восстания, 1, Россия) Ключевые слова: неорганная забрюшинная опухоль, осложнения, классификация Clavien -Dindo, реплантация почки, комбинированные операции The article presents retrospective analysis of complications of surgeries for non-organ-confined retroperitoneal tumors. The study includes information about 236 patients operated between 1996 and 2016 in Irkutsk Regional Cancer Center. All patients were divided into two groups: main group (n = 102) with resection of non-organ-confined retroperitoneal tumors in extended and combined version, and control group (n = 134) with isolated removal of tumor. The patients, who received combined version of operations, are presented in two groups (mono-organ resection group (n = 50) and multi-organ resection group (n = 52)). Postoperative deaths and complications in these groups were analyzed. Clavien -Dindo classification was used in examining the structure of postoperative complications. It was established, that postoperative complications occurred in 44 (19 %) cases. The most frequent ones were intra-abdominal bleeding (3.8 %), wound infection (3 %), femoral nerve neuropathy (2.1 %) and abscess of abdominal cavity or small pelvis (2.1 %). Among patients with isolated removal of non-organ-confined retroperitoneal tumors, post-operative complications made 14 % (16 cases). Post-operative complications in the group with extended and combined resection of non-organ-confined retroperitoneal tumors reached 23 % (28 cases). Accordingly, it was established that enhancing volume of surgery substantially increases frequency of post-operative complications (p = 0.02). Surgical treatment of non-organ-confined retroperitoneal tumors involve developing ACTA BIOMEDICA SCIENTIFICA, 2018, Том 3, № 2 Онкология ЛИТЕРАТУРА