最常见病因憩室型直疝 diverticular direct inguinal hernia ; DDIH
炎症、结核、肿瘤是咯血患者常见病因。
目的：探讨小气道病变常见病因及对因治疗的意义。
Objective: To observe the usual cause of small airway disease and the significance of etiological therapy.
是多毛症的常见病因，常与不规则排卵或不排卵的不孕有关。
It is a common cause of hirsutism and is frequently associated with irregular or absent ovulation and infertility.
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