Table 1.

MRI findings in 22 dogs participating in the litter cohort study

	In All CKCS (n = 22)	In Asymptomatic SM Cases (n = 9)	In Symptomatic SM Cases (n = 13)	P‐Value
Syrinx present/total (%)	21/22 (95)	8/9 (89)	13/13 (100)
Syrinx diameter T2W (cm), mean (range)	0.55 (0.3–0.8)	0.4 (0.3–0.8)	0.63 (0.3–0.8)	.01
Spinal cord diameter (cm), mean (range)	0.94 (0.7–1.1)	0.9 (0.8–1.0)	0.96 (0.7–1.1)	.08
Syrinx : spinal cord ratio, mean (range)	0.58 (0.3–0.86)	0.43 (0.3–0.8)	0.66 (0.33–0.86)	.01
Asymmetric syrinx/total (%)	6/21 (29)	1/8 (13)	5/13 (38)	.19
Cerebellar herniation/total (%)	21/21 (100)	8/8 (100)	13/13 (100)

MRI, magnetic resonance imaging; CKCS, Cavalier King Charles Spaniel; SM, syringomyelia; T2W, T2 weighted.