Consider the following medical report that includes the patient's historical health records. Use it to predict the disease that the patient is high likely exposed to. 

 Medical Report: indication: 45-year-old male without significant past medical history, initially admitted to outside hospital with abdominal pain and found to have portal vein thrombosis and transferred for further evaluation. please evaluate extent of portal vein thrombosis. comparisons: none. grayscale imaging: ultrasound evaluation is difficult given patient's body habitus and poor acoustic window. evaluation of the liver for mass lesions is difficult, however, no large liver lesions are detected. there is no intra- or extra-hepatic biliary ductal dilatation with the common bile duct measuring 4 mm. the gallbladder is distended without intraluminal stone or wall thickening to suggest acute cholecystitis. a small-to-moderate amount of ascitic fluid is present in the right upper quadrant. the liver is diffusely echogenic consistent with fatty infiltration. there is splenomegaly with the spleen measuring 15 cm. doppler evaluation: doppler evaluation is difficult given for acoustic window. the main portal vein appears completely thrombosed. evaluation of the portal into the superior mesenteric vein could not be performed given overlying bowel gas. the right, left, and main hepatic arteries are patent with brisk upstroke and forward diastolic flow. evaluation of the hepatic veins is difficult, and waveforms could not be obtained. impression: 1. limited ultrasound examination given poor acoustic window and habitus. the main portal vein is thrombosed,appearing chronic (small caliber, cavernous transformation seen) with extent into the superior mesenteric vein difficult given overlying bowel gas. a cta abdomen be performed for further evaluation. 2. diffusely echogenic liver consistent with fatty infiltration. however, other forms of diffuse fibrosis/cirrhosis cannot be excluded. 3. splenomegaly. (over) 1:52 am liver or gallbladder us (single organ) clip # reason: with doppler! please evaluate extent of portal vein thrombo admitting diagnosis: portal vein thrombus ______________________________________________________________________________ final report (cont) 4. small-to-moderate amount of ascitic fluid in the right upper quadrant. procedure: venous catheterization, not elsewhere classified diagnoses: dysthymic disorder obesity, unspecified hemorrhage of gastrointestinal tract, unspecified acute vascular insufficiency of intestine attention deficit disorder with hyperactivity nonspecific elevation of levels of transaminase or lactic acid dehydrogenase [ldh] portal vein thrombosis unspecified endocrine disorder 

Answer: The patient is high likely exposed to