A 45-year-old man has had hazy vision for the past month, particularly when he is driving at night. He also endorses small rubberlike nodules on the skin of his trunk, back, arms, and legs that are not painful and do not itch. After seeing his ophthalmologist, he is diagnosed with bilateral cataracts and is scheduled to receive elective cataract surgery. During induction of anesthesia, following intubation, the patient's pressure increases from 110/ 70 to 200/ 90 mmHg. PaCO2 is normal as is his pH. His temperature is 101.5 ° F. An esmolol drip is immediately instituted, after which BP increases to 220/ 90 mmHg and an ECG shows T wave inversion. What is the most likely underlying etiology?
(A) Intra-abdominal tumor
(B) Malignant hyperthermia
(C) Thyrotoxicosis
(D) Inadequate anesthetic agent
(E) Undiagnosed pituitary tumor