Indications, benefits, and disadvantages of lateral skull base approaches for VS resection
Translabyrinthine | Retrosigmoid | Middle Fossa | |
---|---|---|---|
Indications | Unserviceable hearing; any IAC or CPA VS | VS with large CPA component; medial IAC VS | Small lateral IAC VS (<0.5 cm); small medial IAC VS with <1 cm CPA component |
Advantages | Minimal brain retraction | Panoramic CPA exposure; better facial nerve and hearing preservation for medial VS | Better exposure, lateral IAC |
Disadvantages | Complete hearing loss; difficult approach for CPA VS ventral to porus acusticus; risk for facial nerve injury | Limited access to lateral IAC; potential for cerebellar and brain stem injury | Limited PF access; temporal lobe retraction; risk for facial nerve injury |