BACKGROUND: We undertook this study to characterize those @entity1 who required reoperations for @entity1645 and to determine whether modifications in surgical technique at the initial procedure might have obviated the need for repeat surgery. METHODS: We reviewed the hospital records, imaging studies, operative reports, and follow-up data of those @entity1 who were undergoing a second operation as part of a consecutive series of Chiari decompressions carried out by one neurosurgeon over a 14-year period. We wished to determine whether type of @entity1645 , age at initial surgery, the presence of associated @entity154 , or initial operative technique contributed to the need for reoperation. RESULTS: Twenty-two (17%) of the surgical procedures represented reoperations (16 of 100 Chiari I and 6 of 33 @entity1645 ). Of the @entity1 in the series who were operated on at age 5 years or younger, 7 (16%) were reoperations (5 of 33 Chiari I and 2 of 10 @entity1645 ); 15 @entity1 (17%) of those older than 5 years at surgery were reoperations (11 of 67 Chiari I and 4 of 23 @entity1645 ). 8 of the 16 @entity1 who underwent reoperations for @entity1645 and 4 of the 6 @entity1 who underwent reoperations for @entity1645 had their initial decompression surgery at age 5 years or younger. Reoperation was required because of failure to treat adequately an associated syrinx (n=11), because of persisting @entity16 or @entity10 (n=9), or because of a possible faulty fourth ventricular stent placement (n=2). 5 of 9 @entity1 in the operative series with @entity1645 associated with @entity91 (55%), and all 3 of the @entity1 whose syrinx persisted after reoperation had @entity91 . CONCLUSIONS: Approximately 17% of the @entity1 with Chiari I and @entity1645 in this operative series were undergoing a second operation. Factors in this series which were associated with reoperation included a young age at initial surgery, the presence of complex bony anatomy at the foramen magnum, @entity177 of the surgeon at the initial operation either to assess patency of the foramen of Magendie or correctly place a fourth ventricular stent.

Reoperation for XXXX .

@entity1 :: ('9606', 'Species') :: ['patients'] @entity154 :: ('MESH:D000013', 'Disease') :: ['bony anomalies'] @entity1645 :: ('MESH:D001139', 'Disease') :: ['Chiari II decompressions', 'Chiari II malformation', 'Chiari I malformation', 'Chiari II malformations', 'Chiari malformation', 'Chiari malformations'] @entity16 :: ('MESH:D009422', 'Disease') :: ['neurological symptoms'] @entity177 :: ('MESH:D051437', 'Disease') :: ['syndromic craniosynostosis, and failure'] @entity91 :: ('MESH:D003398', 'Disease') :: ['craniosynostosis syndromes', 'craniosynostosis represented reoperations'] @entity10 :: ('MESH:D006261', 'Disease') :: ['headache']
@entity1645 :: (MESH:D001139,Disease) :: ['Chiari malformations']
