- Venous sacrifice of PCC precentral cerebral vein can be done
- Infratentorial supracerebellar
- Sitting/concorde
- Galenic system dorsal to tumour
- Section PCC vein
- Sacrifice thin bridging veins midline
- Preserve thick bridging veins lat
- Easy orientation/ narrow angle and restricted operative field
- Steeply inclined tent
- Occipital transtentorial
- Sitting/prone/concorde/3/4 position
- Occipital lobe retraction
- Corridor between occipital lobe and falx
- Wide view infra and supratentorial compartments
- Tumours with superior and lateral extension
- Tent split easily
- Oblique trajectory
- Veins in way
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