Delayed resolution of syrinx after posterior fossa decompression without dural opening in children with Chiari malformation Type I.

摘要: OBJECT Chiari malformation Type I (CM-I) is associated with a syrinx in 25%-85% of patients. Although posterior fossa decompression (PFD) without dural opening an accepted treatment option for children symptomatic CM-I, many surgeons prefer to open the dura if exists. The purpose this study was investigate frequency and timing resolution undergoing PFD CM-I. METHODS A retrospective review 68 consecutive pediatric patients CM-I syringomyelia who underwent conducted. Patient demographics, presenting symptoms signs, radiographic findings, intraoperative ultrasound neuromonitoring findings were studied as well patients' clinical follow-up. RESULTS During mean follow-up period 32 months, 70% syringes improved. Syrinx improvement occurred at 31 months postoperatively. All experienced symptom within 1st year, despite only 26% showing during that period. Patients sensory or motor weakness had higher likelihood having CONCLUSIONS In opening, occurs approximately Radiographic delayed, but does not correlate temporally improvement. Sensory on presentation are after surgery.