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: extra axial brain stem mass major surgical or invasive procedure: left craniotomy for excision of brain stem mass history of present illness: this is a 24 yo m, who has a 3 yrs history of vague eye issues which aggravated in with double vision on r gaze. he reports double vision with his left eye on r gaze and he describes skewed images c/w 4th cn palsy. approx. 1 yr ago, he had been through an episode of sudden onset excruciating headaches, which lasted for about 1 week. this came about very sudden, and lasted for a while. he had rather unremarkable ha episodes for most of his life. he was evaluated for lazy eye surgery and worked up for his ha with an mri scan, revealing a l skull base lesion with cysctic and solid components, most likely representing a benign tumor. he currently denies ha, n, v, dz, sz. past medical history: epression/anxiety psh: baby tooth removal ; tooth exposures, ; wisdom tooth extraction social history: student; politial science major; currently unemployed non-smoker; non-drinker; marital status: single family history: nc physical exam: on admission: af vss; 6'1''; ca 180 lbs nad neck: supple, no lnn heent unremarkable rrr no sob nttp warm peripherals, no cce neuro: aao x3; normal mentation; pleasant, cooperative normal recall, fluent speech and comprehension. cn: i not tested ii: vision adequate and no vfc to confrontation iii-vi: left 4th cn palsy v: nl sensation and bite strength vii symmetric viii hears finger rubs bilaterally no swallowing difficulties; palate midline, cough + tongue midline bilaterally full strength, no drift normal sensation to lt, vibration no paresthesias symmetric reflexes 2+ b; babsinski - stand and gait stable; rhomberg - no ataxia, dysmetria or dysdiadochokinesis; fine movement and coordination intact on discharge: a&ox3 perrl eoms intact vision acuity stable with glasses full motor throughout incision: slight oozing at l temporal region stable with pressure dressing. dissolvable sutures in place. pertinent results: osh mri (the imaging institute ri; ) this reveals a l sided skull base tumor at the level of the prepontine cistern that ahs a solid, contrast enhancing component measuring ca 2cm; sharply demarkated and displacing the hypothalamus upwards, the mesial temporal lobe laterally and the brainstem posteriorly; there is a second cystic component in the left posterior brain stem c/w an extension indenting the l brain stem and displacing it. mri brain: impression: surgical planning study demonstrates partially solid and partially cystic enhancing lesion in the left suprasellar cistern as well as in the cavernous sinus deforming the left side of the mid brain and pons. the differential diagnostic consideration includes a schwannoma as suggested previously. ct head: impression: expected postoperative changes as described above without evidence of acute hemorrhage. mri brain: status post resection of left-sided cavernous sinus and prepontine cistern mass with some residual enhancement near the brainstem and mild mass effect. the majority of the solid component and portion of the cystic components have appeared to be resected since the previous study. expected post-surgical changes are seen. the tiny area of diffusion abnormality, best visualized on series 502, image 15 could be due to postoperative change, blood products or due to a tiny area of ischemia. given its small size, it is difficult to characterize. no definite territorial infarcts seen or brainstem infarct identified brief hospital course: mr. was admitted electively for craniotomy for removal of a left sided brainstem lesion. postoperatively he was extubated and transfered to the icu for frequent neuro checks and sbp control less than 140. postop head ct demonstrated some pneumocephalus but no hemorrhage. he remained neurologically stable overnight. on he underwent a brain mri which revealed residual enhancement near the brainstem and edema. he was cleared for transfer to the floor and started on sqh. on , he was stable on examination with improvement in both his ue tremors and visual acuity. his dressing was removed and some oozing was seen at the l temporal region which was re-enforced with a dressing to help clotting. he was evaluated with pt which determined that he needed home pt and vna services for wound checks. medications on admission: preadmission medications listed are correct and complete. information was obtained from patient. 1. bupropion (sustained release) 150 mg po bid discharge medications: 1. bupropion (sustained release) 150 mg po bid 2. phenytoin sodium extended 100 mg po tid rx *dilantin extended 100 mg 1 capsule(s) by mouth three times a day disp #*180 tablet refills:*2 3. oxycodone (immediate release) 5-10 mg po q4h:prn pain rx *oxycodone 5 mg tablet(s) by mouth every four (4) hours disp #*60 tablet refills:*0 4. docusate sodium 100 mg po bid rx *colace 100 mg 1 capsule(s) by mouth twice a day disp #*60 tablet refills:*0 5. dexamethasone 2 mg po q8hrs please take 2mg q8h x1 day starting , then take 1 mg (0.5 tab) q8hx 1 day, then 1mg q12h x 1 day, then 1mg once x 1 day, then off tapered dose - down rx *dexamethasone 2 mg 1 tablet(s) by mouth every eight (8) hours disp #*12 tablet refills:*0 discharge disposition: home with service facility: vns of & counties discharge diagnosis: brain stem mass discharge condition: mental status: clear and coherent. level of consciousness: alert and interactive. activity status: ambulatory - independent. discharge instructions: general instructions ?????? have a friend/family member check your incision daily for signs of infection. ?????? take your pain medicine as prescribed. ?????? exercise should be limited to walking; no lifting, straining, or excessive bending. ?????? your incision was closed with dissolvable sutures. you may shower on the 3rd day after surgery. ?????? you may shower before this time using a shower cap to cover your head. ?????? increase your intake of fluids and fiber, as narcotic pain medicine can cause constipation. we generally recommend taking an over the counter stool softener, such as docusate (colace) while taking narcotic pain medication. ?????? unless directed by your doctor, do not take any anti-inflammatory medicines such as motrin, aspirin, advil, and ibuprofen etc. ?????? you have been prescribed dilantin (phenytoin) for anti-seizure medicine, take it as prescribed and follow up with laboratory blood drawing in one week. this can be drawn at your pcp??????s office, but please have the results faxed to . ?????? clearance to drive and return to work will be addressed at your post-operative office visit. ?????? make sure to continue to use your incentive spirometer while at home, unless you have been instructed not to. call your surgeon immediately if you experience any of the following ?????? new onset of tremors or seizures. ?????? any confusion or change in mental status. ?????? any numbness, tingling, weakness in your extremities. ?????? pain or headache that is continually increasing, or not relieved by pain medication. ?????? any signs of infection at the wound site: redness, swelling, tenderness, or drainage. ?????? fever greater than or equal to 101?????? f. followup instructions: follow-up appointment instructions ??????you have an appointment in the brain clinic on @ 10:30. the brain clinic is located on the of , in the building, . their phone number is . please call if you need to change your appointment, or require additional directions. procedure: other operations on extraocular muscles and tendons other excision or destruction of lesion or tissue of brain other repair of cerebral meninges diagnoses: benign neoplasm of brain diplopia fourth or trochlear nerve palsy 

Answer: The patient is high likely exposed to