Questões de USMLE

A 19-year-old man presents with recurrent episodes of flaccid proximal weakness beginning after strenuous exercise or large carbohydrate meals. Between episodes he is neurologicall…

A 24-year-old man presents with recurrent episodes of transient focal weakness following minor compression injuries, including wrist drop after sleeping on his arm and foot drop af…

A 63-year-old man presents with a 3-month history of difficulty rising from a chair and dry mouth. Vital signs: BP 142/88 mmHg, HR 88/min, RR 16/min, temp 37°C, SpO2 98% on room ai…

A 29-year-old woman comes to the clinic because of double vision and drooping of both eyelids that worsen by the end of the day. She also reports difficulty chewing meat at dinner …

A 51-year-old woman presents with a 2-year history of recurrent involuntary neck turning and painful sustained muscle contractions that worsen with stress. Vital signs show BP 128/…

A 46-year-old man presents 24 hours after consuming home-canned vegetables with blurred vision, dysphagia, and dry mouth. He now reports progressive descending weakness. Vital sign…

A 46-year-old woman presents with 3 months of progressive proximal muscle weakness affecting stair climbing and hair combing. Vital signs: BP 128/82, HR 92, RR 16, Temp 37°C, SpO2 …

A 34-year-old woman presents with increasingly frequent brief, shock-like jerking movements of her trunk and upper extremities lasting less than one second. She developed acute hep…

A 51-year-old woman presents with progressive proximal muscle weakness and difficulty rising from a chair over 3 months. Vital signs show BP 128/82, HR 92, RR 16, temp 37.2°C, SpO2…

A 6-month-old boy presents with developmental delay and inability to sit unsupported. Vital signs show HR 110 bpm, RR 28, temp 37°C, SpO2 98%. On exam, he has marked hypotonia, ton…

A 5-year-old boy presents with progressive difficulty climbing stairs and frequent falls over the past 6 months. He uses his hands to push himself upright from the floor (Gowers si…

A 69-year-old man presents with a 2-year history of progressive slowness of movement, shuffling gait, and difficulty initiating walking. Vital signs show BP 138/82, HR 76, RR 14, t…

A 41-year-old woman presents with progressive ptosis and intermittent diplopia worsening throughout the day. She reports difficulty sustaining arm elevation above her head after pr…

A 36-year-old woman with myasthenia gravis self-increased her pyridostigmine dose without medical supervision. She presents with generalized weakness, diarrhea, diaphoresis, and mi…

A 19-year-old man develops muscle rigidity and high fever shortly after induction of general anesthesia with sevoflurane and succinylcholine. Vital signs show temperature 39.2°C, h…

A 12-year-old unvaccinated boy presents with sore throat and a gray pharyngeal membrane. Three weeks after symptom onset, he develops palatal weakness and distal paresthesias. Vita…

A 6-year-old boy is brought to the emergency department by his parents after he fell while playing soccer and was unable to get up. He has a 10-month history of progressive difficu…

A 7-year-old boy presents to the emergency department with a 3-week history of involuntary jerking movements of his arms and legs, emotional outbursts, and difficulty with fine mot…

A 35-year-old woman presents with a 5-year history of progressive tremor affecting both hands that worsens when she reaches for objects or attempts fine motor tasks such as writing…

A 68-year-old man presents to clinic with a 2-year history of progressive tremor that is most noticeable when his hands are at rest. He notes that the tremor improves when he reach…

A 42-year-old woman presents with a tremor most prominent when holding her arms outstretched while pouring coffee. Vital signs show HR 88/min, BP 128/76 mmHg, RR 14/min, temp 37°C.…

A 17-year-old boy presents with 2-year history of progressive proximal muscle weakness affecting hip and shoulder girdles. He ambulates independently but reports difficulty rising …

A 4-year-old boy is brought by his parents for delayed motor milestones and progressive difficulty rising from the floor. He uses his hands to push up his thighs when standing (Gow…

A 62-year-old man with a 50 pack-year smoking history presents with dry mouth, constipation, and progressive proximal leg weakness. He reports strength improves transiently after c…