Table 3. MR findings of HD in neutral and neck-flexed position in our patients.

Patient number	ASD	EFV	CF	LCA	T2 HT	ACC
1	Yes	Yes	Yes	No	No	Yes
2	No	No	No	No	No	Yes
3	Yes	Yes	Yes	Yes	Yes	Yes
4	Yes	Yes	Yes	Yes	Yes	Yes
5	No	No	No	No	Yes	Yes
6	No	No	No	No	No	Yes
7	Yes	Yes	Yes	No	No	Yes
8	Yes	Yes	Yes	No	No	Yes

MR, magnetic resonance; HD, Hirayama’s disease; ASD, anterior shifting of posterior dural sac; EFV, epidural flow-voids; CF, cord flattening; LCA, localized cord atrophy; T2 HT, T2 hyperintensities; ACC, abnormal cervical curvature.