伴区域淋巴结转移的恶性黑色素瘤(简称恶黑)发生自发性肿瘤消减少见,我们收治一例,现结合文献报告如下。患者男性,30岁。发现右拇指甲床黑色斑块三年多。半年前因受伤,右拇指甲破裂后溃烂渗液。当地卫生院仅拨除破碎指甲,未对甲床黑色斑块作任何检查及治疗。拔甲后局部指甲生长,斑块略缩小, The malignant melanoma with regional lymph node metastasis (abbreviated as “black”) has seen a reduction in spontaneous tumor elimination. We have treated one case and we present a combined literature report as follows. The patient is male, 30 years old. Found that the right thumb nail bed black plaque more than three years. Six months ago, due to an injury, the right thumb was broken and ulcerated. The local hospital only removed the broken nails and did not perform any inspection or treatment on the black plaque on the nail bed. Local nail growth after nail extraction, plaques shrink slightly.