Vestibular schwannoma surgery complications

In 333 patients after microsurgery (Koos grading scale 1: 12, grade 2: 34, grade 3: 62, and grade 4: 225) permanent trigeminal nerve dysfunction was found in 1% 2).

In large/compressive, trigeminal nerve deficit has to be sought to avoid corneal complications in particular. Trigeminal hypoesthesia occurs preoperatively in about half of the cases. It remains relatively stable after tumor removal, but there appears to be an increased rate of absent corneal reflex and neurotrophic keratitis postoperatively. Karkas et al. were able to correlate pre/postoperative trigeminal hypoesthesia with pre/postoperative MRI findings 3).


1)
Sarmiento JM, Patel S, Mukherjee D, Patil CG. Improving outcomes in patients with vestibular schwannomas: microsurgery versus radiosurgery. J Neurosurg Sci. 2013 Mar;57(1):23-44. Review. PubMed PMID: 23584218.
2)
Betka J, Zvěřina E, Balogová Z, Profant O, Skřivan J, Kraus J, Lisý J, Syka J, Chovanec M. Complications of microsurgery of vestibular schwannoma. Biomed Res Int. 2014;2014:315952. doi: 10.1155/2014/315952. Epub 2014 May 28. PubMed PMID: 24987677; PubMed Central PMCID: PMC4058457.
3)
Karkas A, Lamblin E, Meyer M, Gay E, Ternier J, Schmerber S. Trigeminal nerve deficit in large and compressive acoustic neuromas and its correlation with MRI findings. Otolaryngol Head Neck Surg. 2014 Oct;151(4):675-80. doi: 10.1177/0194599814545440. Epub 2014 Aug 1. PubMed PMID: 25085321.
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