Table 1.

Disease and patient characteristics

Disease	Number of patients	% male	Mean age at MRI (years)	Age range at MRI (years)
4H syndrome	40	43	9.3	1.3–29.6
PMD	21	100	4.7	1.0–32.9
PMLD	15	67	13.8	2.0–53.3
HCC	13	69	7.1	1.6–19.7
GM2 gangliosidosis	9	44	1.2	1.1–1.4
Salla disease	8	75	5.6	1.6–16.3
Fucosidosis	4	25	5.0	1.8–7.5
GM1 gangliosidosis	2	50	1.4	1.3–1.5