253Waardenburg Syndrome (WS) (瓦登伯革氏症侯群)
254Waldenstrom's Macroglobulinemia (WM) (華氏巨頭蛋白血症)
255Walker-Warburg Syndrome (WWS) (Walker-Warburg綜合症)
256WDR45 (Genetic Disorder)
257Wells Syndrome (韋爾斯綜合症)
258West Syndrome-Infantile Spasms (韋氏症-嬰兒痙攣症)
259Williams Syndrome (WS) (威廉氏症候群)
260Wilson's Disease (WD) (威爾遜氏症)
261Wolf-Hirschhorn Syndrome (WHS) (沃夫-賀許宏氏症候群)
262Wolfram Syndrome (Wolfram症候群)
263Worster-Drought Syndrome (WDS)
264WWOX Syndrome (Genetic Disorder)