This is a list of diseases starting with the letter "Y".
Y
- Y chromosome deletions
- Yaws
- Yeast infection
- Yellow fever
- Yellow nail syndrome
- Yemenite deaf-blind hypopigmentation syndrome
- Yersinia pestis infection
- Yersiniosis
- Yersinia entercolitica infection
- Yersinia pseudotuberculosis infection
- Yim–Ebbin syndrome
- Yolk sac tumor
- Yorifuji–Okuno syndrome
- Yoshimura–Takeshita syndrome
- Young–Hugues syndrome
- Young–Madders syndrome
- Young McKeever Squier syndrome
- Young Simpson syndrome
- Young syndrome
- Yunis–Varon syndrome
- Yusho disease