Nine patients with primary retroperitoneal fat-containing masses (6 liposarcomas, 2 benign teratomas, and 1 benign schwannoma) are reviewed retrospectively.

• 摘要复阅9例原发性后腹腔含脂肪肿块，包括6例脂肪肉瘤，2例良性畸胎瘤，和1例良性神经鞘瘤。