OBJECTIVE To analyze and discuss about the clinicalcharacteristics, pathological types, surgical modalities andtechniques, and postoperative complications in children withtumor of posterior cranial fossa .METHODS Retrospective study was conducted on 102 cases ofpediatric tumor of posterior cranial fossa, admitted and treated inour hospital during the period of January 1996 to January 2007.All patients underwent microscopic surgical treatment. Fifty-eight were male and 44 cases were female. The age ranged from 9months to 14 years old, with an average of 6.1 ± 0.5 of age. CranialCT or MRI examination was conducted before and after thesurgery on all patients.RESULTS The primary manifestations for this group of patientswere increased intracranial pressure and/or ataxia. Postoperativepathological diagnoses showed: 46 cases of medulloblastoma, 43cases of astrocytoma, 11 cases of ependymoma (including 1 caseof degenerative ependymoma), 1 case of dermoid cyst, and 1 caseof teratoma. In this group of the patients, radical surgery wasused in 68 cases and subtotal surgical removal used in 31 cases,while surgical removal of large section was performed on 3 cases.There were no deaths from surgery reported. Ninety-one casesshowed significant symptomatic improvement when comparedwith preoperative conditions, while 11 cases showed either noimprovement or more severely affected afterward. For 6 cases,postoperative ventriculoperitoneal shunt was performed within7 days to 2 months after the surgery. Sixty-three patients gainedfollow-up for 3 to 60 months in duration. Thirty-nine patientsregained normal life and were able to learn well, while there were7 patients who could not live normally on their own. During thefollow-up period, there were 17 cases of recurrence and 7 casesof death. In 23 cases of medulloblastoma in children with age of3 years old or above, 2 cases who underwent surgical removal ofintracranial ependymoma received small dosage of postoperativeX-ray radiotherapy on the the brain and spinal cord. Nine casesof medulloblastoma in children under age of 3 and 17 cases ofastrocytoma diagnosed after the surgery received chemotherapyof Carmustine.CONCLUSION Medulloblastomas and astrocytomas werethe most common types of pediatric tumor of posterior cranialfossa, right followed by ependymoma, and dermoid cysts andteratomas were rare. Early correct diagnosis, proper selection ofappropriate surgical modality and the surgical margin, propertreatment of postoperative complications, and the selecting rightradiotherapy or chemotherapy were the key factors in influencingthe prognostic outcome of children with tumor of posterior cranialfossa. OBJECTIVE To analyze and discuss about the clinical characteristics, pathological types, surgical modalities and techniques, and postoperative complications in children with tumor of posterior cranial fossa. METHODS Retrospective study was conducted on 102 cases ofpediatric tumor of posterior cranial fossa, admitted and treated in hospital during the period of January 1996 to January 2007. All patients were underwent microscopic surgical treatment. Fifty-eight were male and 44 cases were female. The age ranged from 9months to 14 years old, with an average of 6.1 ± 0.5 of age. CranialCT or MRI examination was conducted before and after the surgeries on all patients .RESULTS The primary manifestations for this group of patients were increased by intracranial pressure and / or ataxia. Postoperative pathological diagnoses showed: 46 cases of medulloblastoma, 43 cases of astrocytoma, 11 cases of ependymoma (including 1 case of degenerative ependymoma) , 1 case of dermoid cyst, and 1 case of teratoma. In this g roup of the patients, radical surgery wasused in 68 cases and subtotal surgical removal used in 31 cases, while surgical removal of large section was performed on 3 cases. There were no deaths from surgery reported. Ninety-one casesshowed significant symptomatic improvement when comparedwith preoperative Six cases, while 11 cases showed either noimprovement or more severely affected afterward. For 6 cases, postoperative ventriculoperitoneal shunt was performed within 7 days to 2 months after the surgery. Sixty-three patients became follow-up for 3 to 60 months in duration. Thirty-nine During thefollow-upperiod, there were 17 cases of recurrence and 7 casesof death. In 23 cases of medulloblastoma in children with age of3 years old or above, 2 cases who underwent surgical removal of intracranial ependymoma received small dosage of postoperativeX-ray radiotherapy on the the brain and spinal cord. Nine cases of medulloblastoma in children under age of 3 and 17 cases of astrocytoma diagnosed after the surgery received chemotherapy of Carmustine. CONCLUSION Medulloblastomas and astrocytomas were the most common types of pediatric tumor of posterior cranialfossa, right followed by ependymoma, and dermoid Early correct diagnosis, proper selection ofappropriate surgical modality and the surgical margin, propertreatment of postoperative complications, and the selecting rightradiotherapy or chemotherapy were the key factors in influencing the prognostic outcome of children with tumor of posterior cranialfossa.