Which of the following is not true regarding wilson's disease
KF ring is present in upto 99 % of cases.
ATP 7B mutation results in defective biliary copper excretion into bile as copper can't be incorporated into apoceruloplasmin.
Thus copper accumulates in excess amounts in liver and brain.
The copper accumulation in descemets membrane of cornea is manifested as KF rings, in the eye.
ATP7B mutation leading to impairment in copper metabolism
Most specific screening test is Urinary excretion of copper
Gold standard test is liver biopsy
KF ring is present in upto 30% cases