多原发癌较少见,首先由Billroth(1869)发表后,对本病的报道日见增多,但先后发生在结肠和外耳道者甚少,现报道1例如下。 患者,男性,62岁,1981年10月13日入院。主诉为左耳痒伴耳病约三年。今年一月突然发现在外耳道后壁肿块,迅速增大并突出于外耳道口。同年8月经外院病理 Multiple primary cancers are rare, first reported by Billroth (1869), and there has been an increase in reports of this disease, but there have been very few cases of colon and external auditory canal. The patient, male, 62 years old, was admitted on October 13, 1981. The chief complaint was left ear itch with ear disease for about three years. In January this year, suddenly found in the posterior wall of the external auditory canal mass, rapidly enlarged and prominent in the external auditory meatus. In the same year in August the pathology of the foreign hospital