患者男,57岁。10年前因外伤致左足背而肿痛。予以中草药外敷等治疗(具体不详),疼痛减轻,但左足第二跖趾关节处肿胀未消失且行走不适。此后在当地断续治疗,症状时轻时重。2周前症状加剧,跛行明显,遂来就诊。体检:左足第二跖趾关节处压痛明显,左足跖屈、背伸内翻、外翻均受限;左 Male patient, 57 years old. 10 years ago due to trauma caused by left and foot swelling and pain. Chinese herbal medicine such as topical treatment (specific unknown), reduce pain, but left foot second metatarsophalangeal joint swelling did not disappear and walking discomfort. After intermittent treatment in the local, when the symptoms of light weight. Two weeks ago, the symptoms worsened and the limp obvious, then came to the clinic. Physical examination: left foot second metatarsophalangeal joints tenderness significantly left foot plantar flexion, dorsal extension varus, valgus are limited; the left