Conventional MR imaging features of ameloblastomas and keratocystic odontogenic tumors

MR Imaging Features	Ameloblastomas		Keratocystic Odontogenic Tumors
n	9		7
Maxilla/mandible	1/8		0/7
Size (L × S × H, cm), mean (± SD)	3.6 (1.2) × 2.3 (0.6) × 3.8 (0.9)		2.8 (0.5) × 1.4 (0.7) × 3.3 (1.2)
Tumor with solid wall	9		0
Signal intensity on T1/fsT2WI	Solid Lesion	Nonenhancing Lesion	Nonenhancing Lesion
Low/high	0	7	1
Intermediate/high	0	2	1
Low/intermediate	4	0	1
Intermediate/intermediate	5	0	4

Note:—T1/fsT2WI indicates T1/fat-suppressed T2-weighted images; L × S × H, average long axes (on axial T1WI) × short axes (on axial T1WI) × heights (on coronal T1WI). Solid and nonenhancing lesions indicate tumor areas with and without contrast enhancement, respectively. Bold figures indicate type A nonenhancing lesion with high-intensity signals on fsT2WI.