Table 4.

Surgical information of the PIS patients.

Case no.	Surgical incision/approach	Circumstances of resection	Tumor character/color	Blood supply condition
1	None	subtotal resection	None	None
2	Left temporooccipital region horseshoe-shaped incision	gross total resection	Gray-white	Moderate
3	Right frontoparietal lobe straight incision	gross total resection	furvous	Abundant
4	Left temporal region horseshoe-shaped incision	subtotal resection	Fish-meat-like structure	Moderate
5	None	subtotal resection	None	None
6	Left parietal region horseshoe-shaped incision	gross total resection	Brown-yellow	Abundant
7	Left temporal-parietal region horseshoe-shaped incision	gross total resection	Grey-brown; fish-meat-like structure	Abundant
8	Right frontal region horseshoe-shaped incision	gross total resection	Fish-meat-like structure	Abundant
9	Trans-nasal sphenoidal approach	subtotal resection	unknown	unknown
10	Right temporooccipital region horseshoe-shaped incision	gross total resection	White jelly-like structure	unknown
11	Right suboccipital retrosigmoid approach	gross total resection	Gray-white	Moderate
12	Left suboccipital retrosigmoid approach	subtotal resection	Hard texture and contain a lot of bony structures	Abundant
13	Right pterional approach	gross total resection	yellow	Less
14	Trans-nasal sphenoidal approach	gross total resection	Gray-white	unknown