Table 1 Summary of MRI findings in patients with hippocampal abnormalities.

ID	Age/sex	Group	Lesion side	Volume	Shape	Internal architecture	Rotation	↑ Signal on T2/FLAIR
1	19/F	FCD	R	↓ R	Normal	Abnormal R	Normal	↑ R
2	29/F	FCD	R	↓ R	Round R	Abnormal R	Normal	↑ R
3	16/M	FCD	L	↓ L	Normal	Abnormal L	Abnormal L	↑ L
4	18/M	FCD	R	↓ R	Normal	Normal	Normal	↑ R
5	18/M	FCD	L	↓ L	Round L	Abnormal L	Normal	Normal
6	37/M	HME	R	↑ R	Normal	Abnormal R	Normal	↑ R
7	10/F	HME	R	↓ Bilateral	Normal	Normal	Normal	Normal
8	1/F	HME	R	↑ R	Normal	Normal	Abnormal R	Normal
9	1/F	HME	R	↓ R	Round bilateral	Normal	Abnormal bilateral	Normal
10	1/2	HME	R	↓ Bilateral	Normal	Normal	Normal	Normal
11	18/F	SLH	Bilateral	↑ Bilateral	Normal	Normal	Normal	Normal
12	29/M	SLH	Bilateral	↓ L	Round bilateral	NA	Abnormal L	NA
13	32/M	SLH	Bilateral	↓ Bilateral	Round bilateral	NA	Abnormal bilateral	NA
14	19/F	SLH	Bilateral	↓ R	Normal	NA	Normal	NA
15	36/M	Ag‐P	Bilateral	↑ Bilateral	Round bilateral*	Normal	Normal	Normal
16	4/F	Ag‐P	Bilateral	↑ Bilateral	Normal	Normal	Normal	Normal
17	50/M	PNH	L	↓ Bilateral (L>R)	Abnormal L, round R	Abnormal L	Abnormal bilateral*	Normal
18	19/F	PNH	R	↓ Bilateral (R>L)	Round bilateral*	Normal	Abnormal bilateral	Normal
19	38/M	PNH	R	↓ L	Normal	Abnormal L	Abnormal L	NA
20	40/M	PNH	Bilateral	↓ R	Round R	Abnormal bilateral	Abnormal bilateral	↑ Bilateral
21	8/F	PNH	R	↓ R	Round R	Abnormal R	Abnormal R	↑ R
22	16/M	PNH	Bilateral	↓ L	Round bilateral	Abnormal bilateral	Abnormal bilateral	NA
23	31/F	BPNH	Bilateral	↓ R	Round bilateral	Abnormal bilateral	Abnormal bilateral	↑ Bilateral
24	16/F	BPNH	Bilateral	↓ R	Round L	Abnormal R	Abnormal bilateral	↑ Bilateral
25	35/F	BPNH	Bilateral	↓ R	Round bilateral	Abnormal bilateral	Abnormal bilateral	↑ Bilateral
26	28/M	BPNH	Bilateral	↓ L	Round L	Abnormal L	Abnormal bilateral	↑ bilateral
27	17/M	SCZ	R	↓ Bilateral (R>L)	Round bilateral	Abnormal bilateral	Abnormal bilateral	Normal
28	8/F	SCZ	R*	↓ Bilateral (R>L)	Round R*, flat L	Abnormal R	Normal	↑ L
29	37/M	SCZ	R	↓ R	Round R	Abnormal R	Normal	Normal
30	20/M	PMG	R	↓ Bilateral	Normal	Normal	Normal	Normal
31	6/M	PMG	Bilateral	↓ Bilateral	Round bilateral	Normal	Normal	Normal
32	4/M	PMG	Bilateral	↓ Bilateral	Normal	Normal	Normal	Normal
33	5/F	PMG	Bilateral	↓ L	Round bilateral	Normal	Abnormal bilateral	Normal
34	8/M	PMG	Bilateral	↓ L	Normal	Normal	Normal	Normal
35	30/F	PMG	Bilateral	↓ R	Normal	Normal	Normal	NA
36	41/M	PMG	Bilateral	↓ L	Normal	Normal	Normal	Normal

Ag‐P, agyria‐pachygyria/lissencephaly; BPNH, bilateral periventricular nodular heterotopia; F, female; FCD, focal cortical dysplasia; HME, hemimegalencephaly; L, left; M, male; PNH, isolated single or multiple unilateral periventricular heterotopia; PMG, polymicrogyria; R, right; SLH, subcortical laminar heterotopia; SCZ, schizencephaly.