提示：点击例句中的单词，就可以看到词义解释

Perianal fistulas in crohn 's disease are .

克罗恩病肛周瘘管主要是皮肤.

Fistulas , the internal ruptures that can lead to lifelong incontinence .

瘘管的内部破裂可能会引起终身的大小便失禁。

Closure of urethral fistulas with double opposing z-plasty flaps .

尿道瘘封闭双反对z成。

So far , he has built a wing to repair fistulas free of charge and to train midwives .

迄今为止，医院的侧厅已经竣工，用于免费为产妇们治疗瘘管和培训合格的接生员。

A new method about fixing the fistulas of rumen for milk goats .

奶山羊瘤胃瘘管手术新方法的尝试。