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: findings: there are no previous imaging studies presently available for comparison. however, many do exist, as learned from a discussion with dr. . past medical history included questionable evaluation for tumor 3 years ago at hospital with an apparently negative brain biopsy. presently, the patient was apparently treated for what was thought to be an ischemic infarction, with heparin with subsequent apparent transformation. at this time, there is a large area of low density within the left frontal lobe, insular and basal ganglia region, with some extension towards the medial aspect of the left frontal lobe. there is accompanying compression of the left lateral ventricle. areas of varying hyperdensity are seen within the low density region. they could represent areas of hemorrhagic transformation of an initially ischemic infarct. however, the less dense areas raise the possibility of neoplasm, particularly in light of the questionable past history. as noted above, it is essential that prior imaging studies, particularly those obtained just before heparin administration, be obtained for comparison, to confirm whether all present hyperdense areas have appeared subsequent to anticoagulation, which if true would confirm their hemorrhagic, non-neoplastic nature. impression: probable large left sided hemorrhagic infarct. please see above report for additional discussion. procedure: venous catheterization, not elsewhere classified enteral infusion of concentrated nutritional substances percutaneous [endoscopic] gastrostomy [peg] arterial catheterization other intubation of respiratory tract temporary tracheostomy transfusion of packed cells transfusion of other serum diagnoses: pneumonia, organism unspecified acute and subacute necrosis of liver unspecified septicemia atrial fibrillation defibrination syndrome cardiac arrest bacteremia cerebral embolism with cerebral infarction 

Answer: The patient is high likely exposed to