polycystic kidney disease      
noun [ U ]  medical specialized uk/pɒl.iˌsɪs.tɪk ˈkɪd.ni dɪˌziːz/ us/ˌpɑːl.iˈsɪs.tɪk ˈkɪd.ni dɪˌziːz/
 (遗传性疾病)多囊性肾病
a genetic disorder in which a lot of cysts (= small growths filled with liquid) form on the kidneys often causing kidney failure