CYGB and Kidney Cyst: The macroscopic abnormalities in Cygb−/− mice included lung tumour (Fig. 1Ba), liver tumour (Fig. 1Bb), liver cholestasis (Fig. 1Bc), swelling of the mesenteric lymph node (Fig. 1Bd), hepatosplenomegaly (Fig. 1Be), intestinal tumour (Fig. 1Bf), kidney cyst (Fig. 1Bg), kidney deformity and uterine cyst (Fig. 1Bh), mesenteric cyst (Fig. 1Bi), and heart hypertrophy (Fig. 1Bj).