186Waardenburg Syndrome (WS) (瓦登伯革氏症侯群)
187Walker-Warburg Syndrome (WWS) (Walker-Warburg綜合症)
188WDR45 (genetic disorder)
189Wells Syndrome (韋爾斯綜合症)
190West Syndrome-Infantile Spasms (韋氏症-嬰兒痙攣症)
191Williams Syndrome (WS) (威廉氏症候群)
192Wilson's Disease (WD) (威爾森氏症)
193Wolf–Hirschhorn Syndrome (WHS) (沃夫-賀許宏氏症候群)
194Wolfram Syndrome (Wolfram症候群)
195Worster-Drought Syndrome (WDS)
196WWOX Syndrome (Genetic Disorder)