due to your mother inlaws history of alcoholism
the reason for the referral is to rule out esophagial varices
, ulcers or any kind of cancer.
most propable your mother in law will be done an endoscopy
to rule out the above cases i have just mentioned.
the other reason is also for the gall bladder
being distended what is causing it,that is why she is being referred.
hope to have answered your query
wish your mother in law a quick recovery.