Fig. 2
From: A study on atypical Kashin–Beck disease: an endemic ankle arthritis
X-ray images of lateral ankle joint in patients with KBD and normal controls. aNormal adult ankle joint X-ray image: normal calcaneus length, no hyperplasia of the talar head and body, and smooth articular surface of the talus. b X-ray image of degree I ankle joint changes: the calcaneus is slightly shorter, the talar head and body are hyperplasia, and the articular surface of the talus is smooth. c X-ray image of degree II ankle joint changes: the calcaneus is slightly shorter, the posterior and superior border of the calcaneus is hyperplasia, the head and body of the talus are hyperplasia, and the articular surface of the talus is rough and uneven. d X-ray image of degree III ankle joint changes: short calcaneus, hyperplasia of talus head and talus body, upturned talus head and navicular bone to form bone spurs and peripheral cuneiform spurs, talus articular surface collapsed and flattened