Lee CK, et al. - In this study, researchers investigated the collagen matrix dural substitute type correlated with the incidence of post-operative complications following posterior fossa decompression in adult patients with Chiari I malformations. Findings suggested a higher risk of pseudomeningocele development with dural substitutes generated from porcine collagen, compared to those from bovine collagen, in adult patients undergoing Chiari I malformation decompression and duraplasty.