患者男性,51岁,1995年10月右拇指指甲下被松木碎片刺伤,出现指甲下红肿溃烂,经局部包扎及抗感染治疗近2个月,未见好转。后拔除指甲经局部外科治疗后好转,但创面经常反复愈合不良。1996年11月右拇指创面上发现一米粒大小结节,色暗红,病理活检诊断为恶性黑素瘤,即刻行右拇指截指 The patient was male, 51 years old. In October 1995, he was stabbed by pine wood chips under the nail of the right thumb. There was swelling and ulceration under the nail. He had been treated with partial dressing and anti-infective treatment for nearly 2 months and no improvement was seen. After removing the nails, the nails were improved after local surgical treatment, but the wounds often failed to heal. In November 1996, a rice-sized nodule was found on the right thumb and the color was dark red. The pathological biopsy was diagnosed as malignant melanoma. Immediate right thumb truncation was performed.