Table 1.

Summary of the characteristics of previous cases

Case	Authors	Sex, age (years)	Clinical history	Location of herniation	Location of scalloping	Calcification
1	Vadala et al. [20]	Female, 39	More than 1 year	L5	Vertebral body	−
2		Male, 45	7 years	L5	Vertebral body	−
3		Male, 41	Several years	L5/S	Vertebral body	−
4		Female, 55	3 years	L5	Vertebral body	−
5	Norfray et al. [19]	Female, 43	3 years	S1	Vertebral body	−
6		Male, 48	7 years	L4	Neural foramen	−
7		Male, 41	3 years	L5	Vertebral body	+
8	Briceno et al. [17]	Male, 46	19 years	L4	Vertebral body and pedicle	−
9	Flak et al. [18]	Male, 28	1.5 years	S1	Vertebral body	+
10	Berthelot et al. [16]	Male, 61	Several weeks	T10	Vertebral body	+
Present case	Yoshioka et al.	Female, 82	3 years	L4	Vertebral body, pedicle, and lamina	+