Table 2.

Mean and median pineal volume and stalk diameter at the diagnosis, after chemotherapy, after PBT and at last follow-up.

	N	Mean (mm3/mm)	Median (mm3/mm)	p-value
Volume at diagnosis	11	7418.73	1350
Volume after CHT	11	2079.55	280	0.228
Volume after PBT	11	831.36	240	0.001
Volume at last follow-up	11	1039.64	140	0.001
Stalk diameter at diagnosis	12	9.58	6.5
Stalk diameter after CHT	12	2.67	2	0.036
Stalk diameter post PBT	12	1.92	2	0.001
Stalk diameter at last follow-up	12	1.67	1.5	0.001