掖县卫生学校季永忠报道:在临床上遇到6例黑毛舌患者,除1例一年后死于乙脑,1例为现症病人外,余4例均于2年左右死于癌症(喉癌、结肠癌各1例,胰头癌2例)。举例;男,33岁。1964年夏季患黑毛舌。查体:舌苔墨黑,呈毛状增生,不易剥脱,其余无异常。经用0.2‰呋喃西林液漱 Qi Yongzhong from Ji County Health School reported that 6 cases of black-haired tongue patients were encountered clinically. Except one case died of Japanese encephalitis one year later, and one case was present-day patient, the remaining four cases all died of cancer in about two years ( 1 case of laryngeal cancer, 1 case of colon cancer, and 2 cases of pancreatic cancer. For example; male, 33 years old. In the summer of 1964, he suffered black fur. Physical examination: The tongue fur is dark, showing hairy hyperplasia and not easy to exfoliate. The rest is not abnormal. After using 0.2% nitrofurazone solution