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Table 1 Patient summary (n = 64)

From: Retrosigmoid-transtentorial approach for petroclival meningiomas: operative technique and clinical outcome

Variable N (%)
Gender  
 Male 16 (25.0)
 Female 48 (75.0)
Age, ys  
 Range 20–68
 Mean ± SD 47.0 ± 11.2
Duration of symptom, months  
 Range 0.25–180
 Mean ± SD 32 ± 30
Tumor size, mm  
 10–24 4 (6.2)
 25–44 28 (43.8)
 ≥45 32 (50.0)
Tumor subtype  
 Clivus 28 (43.8)
 Petroclival 13 (20.3)
 Sphenopetroclival 23 (35.9)
Involved structure  
 Brainstem 64 (100)
 Cavernous sinus 17 (26.6)
 Meckel’s cave 32 (50.0)
 Supratentorial ventricular system 18 (28.1)