我们发现许多恶性肿瘤患者的指甲内有纵行的黑线,暂名为“指甲黑线征”。为进一步探索“指甲黑线征”对恶性肿瘤有否诊断价值,我们对住院的恶性肿瘤患者、非肿瘤患者作了对照观察,现将结果报告如下: 经内科、外科、五官科及妇科等确诊为恶性肿瘤住院患者83例,年龄13—81岁,40岁以上者68例,男性53例,女性30例。“指甲黑线 We have found that there are longitudinal black lines in the nails of many patients with malignant tumors, tentatively known as the “nail black line sign.” To further explore whether the “nail black line syndrome” has a diagnostic value for malignant tumors, we made a comparative observation of patients with malignant tumors and non-cancer patients who were hospitalized. The results are reported as follows: The diagnosis was confirmed by internal medicine, surgery, ENT, and gynecology. Eighty-three patients were hospitalized for malignant tumors, aged from 13 to 81 years, 68 patients over 40 years old, 53 males, and 30 females. "Nail black line