Thank you.Some relevant history is essential regarding fever,appetite,weight loss,itching,dysentery,hepatitis B or C status,alcohol,family history of liver disease etc.In this setting of short history it may be due to acute hepatitis
involving left lobe or acute pancreatitis
with alcoholic liver disease
.It may be liver neoplasm,primary or secondary.More possibility is acute pancreatitis or acute hepatitis. Is your father alcoholic for prolonged period which causes hepatomegaly due to alcoholic liver disease.so some blood biochemistry and hematological inv. is required to identify the cause like cbc,s.bilirubin,sgpt,ggt,serum and urinary amylase & viral marker of hepatitis.your father should consult with a hepatologist.