This is a list of diseases starting with the letter "W".
W
Wa
Waa–Wan
- Wagner's disease
- Wagner–Stickler syndrome
- WAGR syndrome
- Walbaum–Titran–Durieux–Crepin syndrome
- Waldenström's macroglobulinemia
- Waldmann disease
- Walker–Dyson syndrome
- Wallerian degeneration
- Wallis–Zieff–Goldblatt syndrome
- Wandering spleen
War–Wat
- Warburg–Sjo–Fledelius syndrome; see Micro syndrome
- Warburg–Thomsen syndrome
- Warburton–Anyane–Yeboa syndrome
- Warfarin antenatal infection
- Warfarin necrosis
- Warkany syndrome
- Warman–Mulliken–Hayward syndrome
- Warm-reacting-antibody hemolytic anemia
- Warts
- Waterhouse–Friderichsen syndrome
- Watermelon stomach
- Watson syndrome
We
Wea–Wer
- Weaver–Johnson syndrome
- Weaver-like syndrome
- Weaver syndrome
- Weaver–Williams syndrome
- Weber–Parkes syndrome
- Weber–Sturge–Dimitri syndrome
- Weber–Christian disease
- Webster–Deming syndrome
- Wegener's granulomatosis (now known as granulomatosis with polyangiitis)
- Wegmann–Jones–Smith syndrome
- Weil syndrome
- Weinstein–Kliman–Scully syndrome
- Weismann–Netter–Stuhl syndrome
- Weissenbacher–Zweymuller syndrome
- Welander distal myopathy, Swedish type
- Weleber–Hecht–Bigley syndrome
- Wellesley–Carmen–French syndrome
- Wells–Jankovic syndrome
- Wells syndrome
- Werdnig–Hoffmann disease
- Werner's syndrome
- Wernicke–Korsakoff syndrome
- Wernicke's encephalopathy
Wes
- West Nile virus
- West syndrome
- Westerhof–Beemer–Cormane syndrome
- Western equine encephalitis
- Westphall disease
Wh
- Wheat hypersensitivity
- Whipple disease
- Whitaker syndrome
- White matter hypoplasia corpus callosum agenesia mental retardation
- White sponge nevus
- Whooping cough (Pertussis)
- Whyte–Murphy syndrome
Wi
Wie–Win
- Wieacker syndrome
- Wiedemann–Grosse–Dibbern syndrome
- Wiedemann–Oldigs–Oppermann syndrome
- Wiedemann–Opitz syndrome
- Wiedemann–Rautenstrauch syndrome
- Wildervanck syndrome
- Wilkes–Stevenson syndrome
- Wilkie–Taylor–Scambler syndrome
- Willebrand disease, acquired
- Willebrand disease
- Willems–De vries syndrome
- Williams syndrome
- Wilms' tumor
- Wilson's disease
- Wilson–Turner syndrome
- Winchester syndrome
- Winkelman–Bethge–Pfeiffer syndrome
- Winship–Viljoen–Leary syndrome
- Winter–Harding–Hyde syndrome
- Winter–Shortland–Temple syndrome
Wis–Wit
Wo–Wy
- Wohlwill–Andrade syndrome
- Wolcott–Rallison syndrome
- Wolff–Parkinson–White syndrome
- Wolf–Hirschhorn syndrome
- Wolfram syndrome
- Wolman disease
- Woodhouse–Sakati syndrome
- Woods–Black–Norbury syndrome
- Woods–Leversha–Rogers syndrome
- Wooly hair syndrome
- Worster-Drought syndrome, various syndromes identified by Dr. Worster-Drought
- Worster-Drought syndrome associated with cerebral palsy
- Worster-Drought syndrome, also known as familial British dementia