Table 1:

Patients with epidural cysts after use of rhBMP-2

Patient	Age (yr)	Diagnosis	Interval MR Imaging (days)	Procedure	Levels
1	49	Congenital spinal stenosis	253	TLIF + laminotomy	L4–L5
2	56	Degenerative spinal stenosis	161	XLIF + TLIF	L3–L5
3	52	Degenerative spondylolisthesis	204	ALIF	L4–L5
4	71	Lumbosacral radiculopathy	70	XLIF	L2–L3
5	62	Lumbosacral radiculopathy	119	ALIF	L5–S1
6	57	Isthmic spondylolisthesis	101	PLIF + laminectomy	L4–S1
7	60	Lumbosacral radiculopathy	35	TLIF + laminectomy	L4–L5
8	60	Pseudoarthrosis	480	TLIF	L4–L5
9	64	Lumbosacral radiculopathy	465	XLIF	L3–L5
10	51	Degenerative spinal stenosis	202	LLIF	L3–L5
11	73	Degenerative spinal stenosis	61	XLIF + laminectomy	L3–L4
12	49	Degenerative spinal stenosis	19	PLIF + laminectomy	L5–S1
13	61	Scoliosis	37	XLIF + PLIF	L4–S1
14	58	Degenerative spinal stenosis	60	XLIF + PLIF + laminectomy	L4–S1
15	71	Lumbosacral radiculopathy	38	PLIF + laminectomy	L3–L5
16	68	Degenerative spinal stenosis	134	TLIF	L4–L5