Tumors and tumor like lesions of the retroperitoneum

ABSTRACT

The purpose of this study Is to elucidate the clinicopathological findings in patients with retroperitoneal tumors, A retrospective study on 152 consecutive patients with retroperitonial tumors seen at the medical City Teaching Hospital during the period between January 1987 and December 1989. All H and.E stained slides and pathology reports were reviewed. There were 118 tumors and 34 tumor-like lesions. Renal tumors were the most common [45.5%]. The most common histoIogical type of renal cell carcinoma was clear cell type [55.5%]. The majority of the these carcinomas were moderately differentiated. Liposarcomas and malignant fibrous histocytomas accounted for 50% of soft tissue sarcomas of the retroperitoneum. About 33% of retroperitoneal tumors were seen in children. Nephroblastoma, neuroblastoma and malignant lymphoma were the most common. Classical histological patterns were seen in 82% of patients with nephroblastoma and 60% of patients had favourable histology