With monitoring of adverse events occurrence for some domestic gamma knives, related data has been analyzed. The results show that most kind of adverse events are common adverse events, in which the occurrence rate of body gamma knife is slightly higher than the head gamma knife's. Meanwhile, as the survey results show, some of adverse events are caused by improper operation or use, and it should be drawn the attention of our administration departments and medical institutes.
Equipment Safety ; Radiosurgery ; adverse effects ; instrumentation

CyberKnife is an image-guided robotic system designed for stereotactic radiosurgery. It uses the combination of robotics and image guidance to deliver concentrated and accurate beams of radiation to intracranial and extracranial targets. Although the frameless nature of the CyberKnife allows tumors in the chest and abdomen to be treated as well, complications associated with CyberKnife treatment have not been established yet due to its short clinical experience. We describe a case of localized esophageal ulcerations after CyberKnife treatment for metastatic hepatic tumor of colon cancer.
Aged ; Colonic Neoplasms/*pathology ; Esophagus/*injuries/pathology ; Humans ; Liver Neoplasms/*secondary/*surgery ; Male ; Radiosurgery/*adverse effects/instrumentation ; *Robotics ; Ulcer/etiology/pathology

OBJECTIVE: To evaluate the outcome of gamma knife for prolactinomas. METHODS: Eighty-nine patients were treated by gamma knife and 51 were followed up. The dose to the tumor margin ranged from 18 Gy to 35 Gy (mean 26.1 Gy). The maximum radiation dose varied from 36 Gy to 60 Gy (mean 50.41 Gy). The mean tumor diameter was 15.5 mm (5 - 26 mm). RESULTS: The follow-up data were available for 51 patients ranging from 6 to 108 months (mean 37 months). The tumor growth control rate was 100%. The endocrinological remission rate was 40%. The rate of hypopituitarism was 17.6%. CONCLUSION Gamma knife radiosurgery can be used as a primary treatment for selected prolactinomas,especially for pituitary microadenomas.
Adolescent ; Adult ; Female ; Follow-Up Studies ; Humans ; Hypophysectomy ; methods ; Hypopituitarism ; etiology ; Male ; Middle Aged ; Pituitary Neoplasms ; surgery ; Prolactinoma ; surgery ; Radiosurgery ; adverse effects ; instrumentation ; Treatment Outcome