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Delayed pseudomyelomeningocele: a rare complication after foramen magnum decompression for Chiari malformation.
Surg Neurol. 2009 Mar; 71(3):357-61, discussion 361.SN

Abstract

BACKGROUND

A variety of complications after FMD with or without duraplasty for Chiari malformation have been described. Although cerebellar ptosis through the dural opening and pseudomeningocele are well-known rare complications of this procedure, spinal cord herniation manifesting as pseudomyelomeningocele formation has not previously been cited in the literature. In this report, we present a case of delayed pseudomyleomeningocele after FMD.

CASE DESCRIPTION

A 22-year-old man presented with progressive spinal cord compression symptoms 7 years after undergoing FMD for Chiari malformation. Craniocervical MRI of the patient revealed pseudomyelomeningocele at C1 level together with cord distortion. The patient underwent untethering surgery for spinal cord adhesions; neural tissue was freed microsurgically from the adjacent structures and duraplasty was performed with synthetic graft. In the early postoperative period, his symptoms resolved moderately.

CONCLUSION

Neural tissue shift including the spinal cord through the dural opening may occur after a large posterior fossa decompression without duraplasty for Chiari malformation. Postoperative inadequate CSF circulation due to arachnoid scarring around the decompression area may facilitate this type condition. Early diagnosis of such a complication is of vital importance to prevent serious neurologic deficits, and release surgery with proper duraplasty and also restoration of CSF circulation is the choice of treatment.

Authors+Show Affiliations

Ministry of Health, Diskapi Educational and Research Hospital Neurosurgery Department, Ankara 06110, Turkey. denizbelen2000@yahoo.comNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Case Reports
Journal Article

Language

eng

PubMed ID

18207518

Citation

Belen, Deniz, et al. "Delayed Pseudomyelomeningocele: a Rare Complication After Foramen Magnum Decompression for Chiari Malformation." Surgical Neurology, vol. 71, no. 3, 2009, pp. 357-61, discussion 361.
Belen D, Er U, Gurses L, et al. Delayed pseudomyelomeningocele: a rare complication after foramen magnum decompression for Chiari malformation. Surg Neurol. 2009;71(3):357-61, discussion 361.
Belen, D., Er, U., Gurses, L., & Yigitkanli, K. (2009). Delayed pseudomyelomeningocele: a rare complication after foramen magnum decompression for Chiari malformation. Surgical Neurology, 71(3), 357-61, discussion 361. https://doi.org/10.1016/j.surneu.2007.08.031
Belen D, et al. Delayed Pseudomyelomeningocele: a Rare Complication After Foramen Magnum Decompression for Chiari Malformation. Surg Neurol. 2009;71(3):357-61, discussion 361. PubMed PMID: 18207518.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Delayed pseudomyelomeningocele: a rare complication after foramen magnum decompression for Chiari malformation. AU - Belen,Deniz, AU - Er,Uygur, AU - Gurses,Levent, AU - Yigitkanli,Kazim, Y1 - 2008/01/22/ PY - 2007/02/26/received PY - 2007/08/09/accepted PY - 2008/1/22/pubmed PY - 2009/5/12/medline PY - 2008/1/22/entrez SP - 357-61, discussion 361 JF - Surgical neurology JO - Surg Neurol VL - 71 IS - 3 N2 - BACKGROUND: A variety of complications after FMD with or without duraplasty for Chiari malformation have been described. Although cerebellar ptosis through the dural opening and pseudomeningocele are well-known rare complications of this procedure, spinal cord herniation manifesting as pseudomyelomeningocele formation has not previously been cited in the literature. In this report, we present a case of delayed pseudomyleomeningocele after FMD. CASE DESCRIPTION: A 22-year-old man presented with progressive spinal cord compression symptoms 7 years after undergoing FMD for Chiari malformation. Craniocervical MRI of the patient revealed pseudomyelomeningocele at C1 level together with cord distortion. The patient underwent untethering surgery for spinal cord adhesions; neural tissue was freed microsurgically from the adjacent structures and duraplasty was performed with synthetic graft. In the early postoperative period, his symptoms resolved moderately. CONCLUSION: Neural tissue shift including the spinal cord through the dural opening may occur after a large posterior fossa decompression without duraplasty for Chiari malformation. Postoperative inadequate CSF circulation due to arachnoid scarring around the decompression area may facilitate this type condition. Early diagnosis of such a complication is of vital importance to prevent serious neurologic deficits, and release surgery with proper duraplasty and also restoration of CSF circulation is the choice of treatment. SN - 0090-3019 UR - https://www.unboundmedicine.com/medline/citation/18207518/Delayed_pseudomyelomeningocele:_a_rare_complication_after_foramen_magnum_decompression_for_Chiari_malformation_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0090-3019(07)00981-0 DB - PRIME DP - Unbound Medicine ER -