Objective To summarize the imaging characteristic of cavernous sinus cavernous hemangiomas(CSHAs),and evaluate the effects of Gamma Knife Radiosurgery (GKS) on CSHAs.Methods The clinical date of 16 patients with CSHAs were analyzed retrospectively,all cases were treated by GKS and with complete follow - up data in our hospital from September 2001 to December 2009.Of the 16 patients,6 had residual tumor after surgery,2 were biopsied,and 8 were diagnosed by neuroradiology and follow - up data in recent years.The mean maximum diameter of tumors was 34.6 mm ( ranged 15.0 ～ 55.0 mm ),the mean tumor margin dose was 12.1 Gy ( ranged 8.0 ～ 15.0 Gy) at the isodose line from 40％ to 60％,the mean max dose was 24.3 Gy( ranged 16.0 ～32.5 Gy).The mean follow - up period was 40.5 months ( ranged 6 -96 months).Results No patients suffered from a new and eternal cranical never deficit after GKS treatment.2 patients suffered from transient oculomotor palsy among 3 months and 6 months.Imaging findings revealed:of the 16 tumors,4 almost disappeared,10 decreased markedly in size and 2 kept stable.1 patient was treated again by GKS after 6 months,and 2 patients were treated again for tumors decreased not remarkable in size,these tumors all decreased markedly in follow -up.Conclusion GKS treatment can effectively control tumor growth with mild side - effects.It is one of the best treatment for postoperative tumor residual,small and middle - size CSHAs,or for patients who are not suitable for craniotomy.