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: allergies: no known allergies / adverse drug reactions attending: chief complaint: rectal bleeding major surgical or invasive procedure: none history of present illness: patient is a pleasant 79 year old male who presented earlier today with complains of brbpr. in the past several days he has been experiencing abdominal cramps and was evaluated at the hospital, where patient stated he was admitted for about 2 days. we do not have records from the visit. patient reports there was no bleeding per rectum on that admission. this morning he noticed bright blood with his bowel movements and felt little bit lightheaded. at the , his hct was 40.8 and repeat was 35. he had a ct abdomen and pelvis which showed active bleeding at the sigmoid . he was subsequently transferred to us for angiogram. patients is hemodynamically stable. he has continued bright red blood per rectum. he denies any fevers, chills. he reports history of similar episode of brbpr about 15 years ago, which was stopped. patient had a colonoscopy at that time. one and a half year ago he had another episode of brbpr rectum which seemed to originate from the internal hemorrhoids, which were banded at that times. patient has not had any problems with the hemorrhoids since. past medical history: pmh: - sigmoid diverticulosis - lower gi bleed 15 years ago - internal hemorrhoids - hypertension - hyperlipidemia - cad s/p cabg in psh: - cabg - appendectomy 44 years ago - turp social history: no etoh, no smoking, lives alone, drives, is independent, visits gym regularly, lifts weights family history: one out of six brothers had cancer in his 50s physical exam: temp 98.2 hr 88 bp 123/88 rr 16 o2 sat 100% ra gen: nad cv: rrr pulm: cta b/l abd: mildly softly distended, hypoactive bowel sounds, minimally tender, no rebound, no guarding rectal: no external hemorrhoids, there is bright red blood in the rectum extremities: no edema pertinent results: 07:45pm wbc-21.0* rbc-4.12* hgb-12.2* hct-35.3* mcv-86 mch-29.7 mchc-34.6 rdw-14.9 07:45pm plt smr-normal plt count-218 07:45pm pt-12.6 ptt-23.5 inr(pt)-1.1 07:45pm glucose-116* urea n-18 creat-1.1 sodium-131* potassium-4.9 chloride-99 total co2-27 anion gap-10 cta abd/pelvis : 1. focus of active extravasation within the sigmoid . significant sigmoid diverticulosis. 2. six mm right middle lobe pulmonary nodule for which follow-up chest ct in one year is recommended. ct angiogram : 1. angiography demonstrated conventional anatomy. 2. angiography and selective sigmoid branch angiography did not demonstrate any active extravasation. specifically, branches that were corresponding to the area of concern on the prior cta were targeted, and no extravasation was identified. brief hospital course: mr. was evaluated by the acute care team in the emergency room and admitted to the hospital for further work up of his gi bleed. he was admitted to the icu and made npo and hydrated with iv fluids. on he underwent an angiogram which demonstrated no active bleeding. his hematocrit was 32 on admission and remained in that range of 30-32. following transfer to the surgical floor his hematocrit remained stable. he started a regular diet and was having formed bm's although he did have blood noted on the toilet paper. the gi service recommended a colonoscopy in 4 weeks as long as his hematocrit was stable. he also requested referral for a new pcp and was given that information. he will need a follow up chest ct in 1 year as he had a 5mm rml nodule found on his ct scan from . he was discharged on and will follow up with the gi service. medications on admission: metoprolol 25 mg , aspirin 81 mg once daily, lipitor 15 mg once daily discharge medications: 1. metoprolol tartrate 25 mg tablet sig: one (1) tablet po bid (2 times a day). 2. atorvastatin 10 mg tablet sig: 1.5 tablets po daily (daily). 3. docusate sodium 100 mg capsule sig: one (1) capsule po bid (2 times a day). 4. psyllium 1.7 g wafer sig: one (1) wafer po daily (daily). discharge disposition: home discharge diagnosis: gi bleed discharge condition: mental status: clear and coherent. level of consciousness: alert and interactive. activity status: ambulatory - independent. discharge instructions: * you were admitted to the hospital with rectal bleeding and your blood count decreased, indicating that you had an active bleed. an angiogram was done which showed no active bleeding at this time and your blood count has been stable for the last 24 hours. * continue to eat a regular diet and stay well hydrated. make sure that you take a stool softener daily. * you will need a colonoscopy in one month and you can book it with the clinic for a convenient time. * if you develop any increased bleeding, dizziness or any other symptoms that concern you please call your doctor or return to the emergency room. followup instructions: call the clinic at for a follow up appointment in 4 weeks with a colonoscopy. call at to arrange an appointment with a primary care doctor. you will need a chest ct scan in one year to follow up on a small nodule in your right lung. procedure: arteriography of other intra-abdominal arteries diagnoses: unspecified essential hypertension coronary atherosclerosis of unspecified type of vessel, native or graft aortocoronary bypass status other and unspecified hyperlipidemia other diseases of lung, not elsewhere classified precipitous drop in hematocrit diverticulosis of colon (without mention of hemorrhage) internal hemorrhoids without mention of complication hemorrhage of rectum and anus 

Answer: The patient is high likely exposed to