Özet:

Objective: Retroperitoneal tumors are rare and most of them arise from mesodermal or neuroectodermal tissues and residues of the embryonic urogenital body. Retroperitoneal malignant tumors are seen more often than benign lesions. Due to their anatomic location and slow growth, pain and neurological symptoms do not appear until later stages. In this article, we aim to present our experience in eight cases with primary retroperitoneal tumor. Methods: Eight patients who underwent retroperitoneal tumor excision between April 2009 and April 2016 were included in the study. Gender, age, patients’ complaints, the location, type and size of the tumor, surgical techniques, and morbidity, recurrence, and mortality rates were evaluated. The mean follow-up period was 41.3 months. Results: Four of the eight patients were females and the mean age was 48.6 years. The retroperitoneal mass was located in the abdomen (n=4) and in the pelvis (n=4). In addition to abdominal pain, some patients experienced back and leg pain, difficult urination, and constipation. Intra-operative biopsy was performed previously during a laparotomy (n=2). Mass excision was performed by open and laparoscopic surgery. Variable histopathological diagnoses were determined, such as schwannoma, cystic mesothelioma, angiomyolipoma, epidermoid cyst, liposarcoma, ganglioneuroma, and neurofibroma. Morbidity included intra-operative bleeding (n=1), post-operative deep vein thrombosis (n=2), and pulmonary embolism (n=1). Postoperatively there were neither recurrences nor mortality. Conclusion: Primary retroperitoneal tumors can be located in different regions, but we did not find any tumors localized in the left lumbar region. The pathological diagnoses were heterogeneous, including seven benign lesions and one malignant lesion.

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