See Conditions by First Letter (W)
- WAGR Syndrome
- Waldenstrom Macroglobulinemia
- Walker-Warburg Syndrome
- Warm Antibody Hemolytic Anemia
- Warts
- Wasting Syndrome
- Water Intoxication
- Water-Electrolyte Imbalance
- Watermelon Stomach
- Watson Syndrome
- WDHA Syndrome
- Weber Syndrome
- Wegener Granulomatosis
- Weight Gain
- Weight Loss
- Weil Disease
- Wells Syndrome
- Werner Syndrome
- Wernicke Encephalopathy
- Wernicke-Korsakoff Syndrome
- West Nile Encephalitis
- West Nile Fever
- West Nile Virus
- West Syndrome
- Western Equine Encephalitis
- Wet Macular Degeneration
- Wheat Hypersensitivity
- WHIM Syndrome
- Whiplash Injuries
- Whooping Cough
- Williams Syndrome
- Wilms Tumor
- Wilson Disease
- Wiskott-Aldrich Syndrome
- Wolff-Parkinson-White Syndrome
- Wolfram Syndrome
- Wolman Disease
- Wound Infection
- Wounds and Injuries
- Wounds, Nonpenetrating
- Wounds, Penetrating
- Wrist Injuries