Review Question - QID 212384

A 78-year-old woman is brought by her grandson to the urgent care clinic following a fall. He states that he was in the kitchen making lunch when he heard a thud in the living room. When he ran into the room, he found the patient conscious but lying on the floor. The patient says she remembers getting up to go to the bathroom, feeling lightheaded, and then “blacking out.” She says “it all happened at once,” so she does not remember if she hit her head. The son denies witnessing myoclonic jerks. The patient denies any urinary or bowel incontinence. The patient states that she has had similar episodes like this before but had never fallen or fainted. Her medical history is significant for osteoporosis, for which she takes alendronate, and rheumatoid arthritis, for which she takes low-dose methotrexate. She smokes 1/2 a pack of cigarettes per day. The patient’s temperature is 97°F (36.1°C), blood pressure is 105/62 mmHg, pulse is 68/min, and respirations are 13/min with an oxygen saturation of 98% on room air. She has a 3-cm area of ecchymosis on her right upper extremity that is tender to palpation. Laboratory data, radiography of the right upper extremity, and a computed tomography of the head are pending. Which of the following is most likely to be seen on further work-up of this patient?