Primary Location (No. of WNT-MBs) | Extension | Further Extension | LS | ||
---|---|---|---|---|---|
Fourth ventricle (25) (66%) | Unilateral recess | n = 7 | Plus uni CPA | n = 1 | 2 |
No | n = 6 | 1 | |||
Bilateral recesses | n = 16 | Plus uni CPA | n = 4 | 1 | |
Plus bi CPA | n = 0 | 0 | |||
No | n = 12 | 0 | |||
No extension | n = 2 | 0 | |||
Cerebellar vermis (3) (8%) | Unilateral recess | n = 1 | 1 | ||
Bilateral recesses | n = 1 | 0 | |||
Fourth ventricle only | n = 1 | 0 | |||
No extension | n = 0 | 0 | |||
CPA (5) (13%) | Unilateral recess | n = 4 | Plus fourth ventricle | n = 4 | 2 |
Bilateral recesses | n = 0 | 2 | |||
No extension | n = 1 | 2 | |||
Deep WM (3) (8%) | Unilateral recess | n = 1 | Plus uni CPA | n = 1 | 2 |
Bilateral recesses | n = 0 | 2 | |||
Fourth ventricle only | n = 1 | 2 | |||
No extension | n = 1 | ||||
Cerebellar hemisphere (2) (5%) | Unilateral recess | n = 2 | Plus uni CPA | n = 1 | 2 |
Bilateral recesses | n = 0 | 2 | |||
Fourth ventricle only | n = 0 | 2 | |||
No extension | n = 0 | 2 |
Note:—uni indicates unilateral; bi, bilateral.