Table 3 Treatment details of 33 adult UTGs

 Parieto-occipital transventriclular approach

22(66.7)

 Frontal transcortical approach

6(18.2)

 Precentral interhemispheric transcallosal interforniceal approach

5(15.2)

Extent of surgical resection

 Gross total tumor resection (≥90 %)

19 (57.6)

 Subtotal tumor resection (≥80 but <90 %)

9 (27.3)

 Partial tumor resection (<80 %)

5 (15.2)

Location of residual tumor

 Posterior part of the third ventricle

3 (20)^a

 Lateral part of the thalamus adjacent to the internal capsule

6 (40)^a

 Medial and internal part of the thalamus

6 (40)^a

Preoperative ventricular peritoneal shunt

 Yes

7 (21.2)

 No

26 (78.8)

Postoperative ventricular peritoneal shunt

 Yes

4 (12.1)

 No

29 (87.9)

Postoperative adjuvant therapy

 Radiotherapy + chemotherapy

10 (30.3)

 Radiotherapy

16 (48.5)

 Chemotherapy

2 (6.1)