Hello I have gone through your query In my opinion your fatty liver is causing your spleen to increase in size.normally the deoxygenated blood from spleen travels to portal vein and through the liver to the heart.you have a fatty liver and there is obstruction to the flow of blood through the liver.it is causing back pressure to the spleen and more blood is accumulating in your spleen and hence resulting in its increased size. You need to look after your fatty liver by reducing fat intake such as butter,cheese,unskimmed milk and refined foods such as pizza etc. Other causes of increased spleen size are Blood disorders such as lymhoma and leukemia for which blood complete picture is needed. Infections such as malaria,typhoid and kalazar. Right heart failure,constrictive pericardiatis and pericardial effusion. These other causes are less likely to be present in your situation as per information provided. In my opinion you should meet a gastroenterolgist to look after your liver status and a haematologist to look at your blood picture. Thanks. Hope the answer is helpful Wish you a healthy life