[患者]男,66岁。于1986年5月右足跟底部被锈钉刺伤,深约1.0cm,当时挤出少许血水,未行其他处理。而后伤口经久不愈,约四个月左右局部变为黑紫色,且范围逐渐扩大,直径约为2.0cm。行走、挤压伤口处可流出少许黑紫色液体。伤后半年在长春市某区医院将伤口处黑紫色坏变组织切除,而后局部愈合。切除组织未 [Patient] Male, 66 years old. In May 1986, the bottom of the right heel was punctured with rusty nails and was about 1.0 cm deep. At that time, a little blood was squeezed out and no other treatment was performed. Then, the wound was persistently unrecoverable, and it became dark purple in about four months, and its range gradually expanded, with a diameter of about 2.0 cm. Walking, squeezing the wound can flow out of a little dark purple liquid. Six months after the injury, the black purple lesions were removed from the wound at a hospital in Changchun City, and then healed locally. Excision of tissue not