Dear madam, hypoplasia
of right hepatic lobe is a rare anomaly that is sometimes associated with ectopy of gall bladder
but it is usually asymptomatic. This anomaly shoudnt raise his SGPT levels or any liver enzymes. You should try to find some other reason for it such as alcohol, viral or autoimune hepatitis
or metabolic diseases. CT and US can visualize liver morfology but to be sure he needs to do liver biopsy
to rule out other disorders. Secondly, he shouldnt be worried about this SGPT if he doesnt have any symtpoms so i suggest you just to do frequent lab tests and avoid food/alcohol which damage liver.
Wish you good health