Hello
USG findings may indicate renal parenchymal disease.This is indicated by coarse cortical echotexture of kidneys.Your father-in-law need clinical examination and further investigations.
Investigations include routine hemogram,random blood sugar,renal function test(include serum urea,
creatinine),creatinine clearance,GFR,serum sodium,potassium,calcium,phosphorus,chloride,bicarbonate etc.
It is important to assess severity of illness.Treatment depend upon findings.
Simple cyst in kidney is a age related finding and it is a benign finding.
Diffusely increased echotexture of liver indicates fatty changes in liver.
Fatty liver is a reversible condition and it can be reversed by diet and life style changes.
Take Care
Dr.Indu Bhushan