Introduction: Chiari malformation Type I (CM-I) is typically defined as descent\nof the caudal tip of cerebellar tonsils at least 5 mm below the foramen\nmagnum. The incidence of the malformation is not exactly known. Treatment\nof Chiari I malformation is debatable. Some advocate posterior fossa decompression\n(PFD) with duroplasty and others advocate posterior fossa decompression\nonly without duroplasty. Aim of the Study: To compare the outcomes\nof patients who undergoing PFD with duroplasty and PFD without\nduroplasty, in Chiari I malformation. Patients and Methods: In the period\nbetween â??January 2015-June 2016â?, a prospective study was conducted involving\n20 patients complaining of headache, motor and/or sensory affection\nsecondary to Chiari I malformation. These patients were randomly divided\ninto 2 groups. The first one had PFD with duroplasty and the other will have\nPFD without duroplasty. All patients had chiari one malformation in form of\ntonsillar herniation and cervical or cervico-dorsal syrinx. The average follow-\nup period was 9 months. Results: Over 90% of patients had a good clinical\noutcome, with improvement or resolution of their symptoms at last follow-\nup. There were no major complications. The mean length of hospital stay\nwas 2.0 days. There was no perioperative death or neurological deterioration.\nThe use of duroplasty was significantly associated with presence of complications\nand longer duration of hospital stay. Conclusion: PFD without duroplasty\nin cases of chiari I malformation carries a good results as well as PFD\nwith duroplasty with lower risk of complications.
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