Table 1.

Grading matrix for cranial ulnar cortical remodeling (CUCR).

Severity of cranial ulnar cortical new bone formation	Definition
CUCR0	All of the following or only mild changes in one of the following: - No disruption in cortical definition - The cortex appears smooth/homogeneous - No bulging or new bone formation on the ulnar cortex
CUCR1	Moderate-severe changes in one or changes in more than one of the following: - The cortex is not well-defined - The cortex appears rough/heterogeneous - New bone formation is evident on the ulnar cortex
CUCR2	Ulnar physeal bulging near the distal ulnar growth plate with the bulge protruding distally