TABLE III.

Morphology of the S1 Upper Segment^*

	No. of Patients	Normal S1	L5-Like†	S2-Like
LSTV	111	4	36	71
Castellvi type II	28	3	0	25
Castellvi type III	42	0	0	42
Castellvi type IV	4	0	0	4
S6	37	1	36	0
Non-LSTV	13	4	0	9
Total‡	124	8	36	80

^*The values are given as the number of patients.

^†L5-like may be L4 or L6, depending on the case.

^‡The numbers represent the sum of LSTVs and non-LSTVs.