Clinical and diagnostic imaging information of the study patients.

Number–patient number in veterinary hospital database. Patient ID–number, corresponding to patient ID number in the manuscript. Acute cases (+/-)—+ patients presented at the hospital in acute phase of SCI (3 weeks). Surgery at referring veterinarian (+/-)—+performed;—not performed. MRI time points– 0 = before decompressive surgery; 1 = 1–3 weeks after decompression; 2 = 3 weeks-2 months; 3 = 2–5 months, 4 = 5–8 months, 5 = 8–11 months, 6 = 11–14 months, 7 = 14–17 months, 8 = 17–20, 9 = >20 months after adequate decompression. SCA >3 weeks following decompression—0 = no atrophy; mild atrophy 1 = 0,75–0,95; average atrophy 2 = 0,35–0,75; severe atrophy 3 = 0–0,35 spinal cord diameter in SCI epicentre in comparison to normal spinal cord diameter. Maximal CSA of intramedullary lesion—0 = no lesion, 1 = 1–35%, 2 = 35–75%, 3 = 75–100% of the spinal cord area. T1W MRI examination—+ available,—not available. FLAIR MRI examination—+ available,—not available. Fluid-filled cavitations/syringomyelia—+ present;—not present. Maximal CSA of intramedullary lesion– 0 = no lesion, 1 = 1–35%, 2 = 35–75%, 3 = 75–100% of spinal cord area. Intramedullary hyperintensity in initial T2W MR images (+/-)—+ present;—not present; n.a. = not available. (XLS)