Symptoms from a retroperitoneal sarcoma are usually produced by
Retroperitoneal sarcomas grow along fascial planes and envelop rather than invade retroperitoneal organs.vLymph node metastases are unusual. The tumor does not usually grow rapidly enough to outgrow its blood supply, and major hemorrhage into the tumor mass is uncommon.
Bleeding into the tumor mass
Compression of adjacent tissues
Invasion of retroperitoneal organs
Metastases to retroperitoneal lymph nodes
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