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: history of present illness: this is a 64 year old male with past medical history of hypertension and hypercholesterolemia as well as a history of type b aortic dissection in , with recent cat scan that revealed interval enlargement of a penetrating ulcer within the thoracic aorta that went from 2.3 cm to 3.2 cm. this has been followed by serial ct scans during this time. his aneurysm measures 6.2 cm in maximum diameter. he was initially going to have this repaired in early of this year, however, this was not able to be done due to failed placement of a cerebrospinal fluid drain for anesthesia as well as a failed intrathecal catheter. he had a follow-up mri after this that was deemed to be normal. also of note, his cardiac catheterization in of this year revealed no significant coronary artery disease with an ejection fraction of 56% and normal left sided filling pressures with the thoracic aortic aneurysm as described above. his echocardiogram last revealed no aortic regurgitation with mild thickening of the mitral and aortic leaflets. dictation ended , m.d. dictated by: medquist36 d: 11:48:31 t: 13:51:07 job#: procedure: venous catheterization, not elsewhere classified extracorporeal circulation auxiliary to open heart surgery diagnostic ultrasound of heart insertion of endotracheal tube fiber-optic bronchoscopy resection of vessel with replacement, thoracic vessels other cystoscopy other incision of pleura transfusion of packed cells cardiopulmonary resuscitation, not otherwise specified transfusion of other serum diagnoses: pure hypercholesterolemia urinary tract infection, site not specified unspecified essential hypertension diabetes mellitus without mention of complication, type ii or unspecified type, not stated as uncontrolled pulmonary collapse cardiac arrest unspecified disorder of kidney and ureter obesity, unspecified dissection of aorta, thoracic 

Answer: The patient is high likely exposed to