This article reports 46 cases of liposarcoma admitted in our hospital from 1962 to 1986. We had discussed the site of the tumor, clinical features, diagnostic evidences, operative treatment and prognosis. Liposarcoma usually occured in the extremities and retroperitonunm. The tunor size depends on its site. The effective treatment is surgical excision. If the tumor in the retroperitonurn is large enough not to be cut by excision, intra-eapsulectomy may be used. Re-resection of postoperative recurrent cases also gained long-term survial.

3626 cases of abdominal cystic mass wereclassified by authors. Results showed that ovarycystic mass was the most common among them.there were 2653 cases in all, accounting for73. 167%. In this paper 88 cases that were compar-atively rare were classified in details, according tooriginal tissue inflammatory cystic mass and reten-tive hydrops were the mose common, there were40 cases in all (45. 45%), congenital cystic masswas the second, 26 cases (29. 55%), developing lo-cation abserved was the most common in meson-tery, 32 cases (36. 36%), the second in abdominalcavity, and then, retroperitoneum, appendix, ete.