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