First metatarsophalangeal joint synovial hypertrophy associated with vitamin D status in type 2 diabetes mellitus: An ultrasound-graded study

Figure 2 Ultrasound characteristics of semi-quantitative grading of metatarsophalangeal joint synovial hypertrophy located in the region from metatarsal head apex to diaphysis. A: Mild synovial hypertrophy (1b); B: Moderate synovial hypertrophy (2b); C: Severe synovial hypertrophy (3b). M: Metatarsal head; P: Proximal phalanx; SH: Synovial hypertrophy; Dashed line: The horizontal line of the metatarsal head apex.