第１０讲男性外生殖器疾病小手术（２）许怀瑾１００７３０北京同仁医院２尿道外口疾病２．１尿道回旁肿不多见，尿道囊肿可发生在尿道各部，发生在尿道口的称为尿道口旁囊肿，亦称Ｔｙｓｏｎ囊肿。其原因是由于开口在尿道口边缘的尿道旁管的开口封闭后形成的。囊肿的大小... Lecture 10 male genital small surgery (2) Xu Huaijin Beijing 100730 Beijing Tongren Hospital 2 urethral mouth disease 2.1 Urethral peritumoral rarely seen urethral cysts can occur in the urethra, urethra in the mouth called the urethra Side of the cyst, also known as Tyson cyst. The reason is that the opening is formed after the opening of the paraurethral tube at the edge of the urethra is closed. The size of the cyst