W in Research
- Waaler Aarskog syndrome
- Waardenburg syndrome
- Waardenburg syndrome type 1
- Waardenburg syndrome type 2
- Waardenburg syndrome type 2A
- Waardenburg syndrome type 2B
- Waardenburg syndrome type 3
- Waardenburg syndrome- type 4
- WAGR syndrome
- Walbaum Titran Durieux Crepin syndrome
- Waldenstrom macroglobulinemia
- Waldmann disease
- Walker Dyson syndrome
- Wallerian degeneration
- Wandering spleen
- Warburg Sjo Fledelius syndrome
- Warburton Anyane Yeboa syndrome
- Warfarin syndrome
- Warm-reacting-antibody hemolytic anemia
- Warman Mulliken Hayward syndrome