Smith et al reported a staging system for predicting the risk of severe complications following surgery for vestibular schwannoma. The authors are from New York Medical College, Washington University and Medical College of Georgia.
Patient selection: vestibular schwannoma
Outcome: severe postoperative complications (Clavien-Dindo grade >= 3)
Symptom Class System (SCS)
Hearing Loss
Vestibular Dysfunction
SCS
no
no
I
long-standing
no
I
recent
no
II
long-standing
yes
II
no
yes
II
recent
yes
III
Clinical Severity Staging System (CSSS)
SCS
Size
Stage
I
NA
alpha
II or III
< 1.5 cm (small)
alpha
II or III
1.5 to 2.5 cm (medium)
beta
II
> 2.5 cm (large)
gamma
III
> 2.5 cm (large)
delta
Stage
Severe Complications
alpha
8%
beta
17%
gamma
32%
delta
56%
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