Questões de USMLE

A 52-year-old woman presents with weight loss and palpitations. Vital signs: BP 142/88, HR 108, RR 18, Temp 37.2°C, SpO2 98%. Laboratory studies show elevated free T4 (28 pg/mL) an…

A 45-year-old woman with no significant medical history presents for routine breast cancer screening mammography. The examination is interpreted as BI-RADS 4 (suspicious for malign…

A pharmaceutical company manufacturing antihypertensive medications invites a resident physician to an all-expenses-paid weekend conference at a luxury resort. The 3-day event incl…

A 45-year-old woman with newly diagnosed type 2 diabetes mellitus is counseled about lifestyle modifications. She expresses strong belief that her condition is due to "bad luck" an…

A 23 year old woman develops paraplegia after a spinal cord injury and survives for decades with major functional limitation. Health economists want a measure that combines years l…

A 7-year-old boy with acute lymphoblastic leukemia currently receiving chemotherapy (HR 102, BP 98/62, temp 37.2°C) has an absolute neutrophil count of 800/μL and cannot receive li…

A 15-year prospective cohort study enrolls 5,000 asymptomatic adults aged 40-60 years and follows them for cardiovascular disease (CVD) outcomes. Baseline measurements include tota…

A 78-year-old man with advanced pancreatic cancer and an estimated life expectancy of 2 months tells his physician he wants to stop all treatment, including IV fluids and nutrition…

A tropical region in Southeast Asia has consistently reported 15 to 20 malaria cases per 100,000 people annually for the past 8 years with minimal year-to-year variation. Serologic…

Researchers conduct a study to evaluate the effectiveness of a newly licensed rotavirus vaccine in a developing country. They vaccinate 8,000 children aged 6-24 months in a rural d…

A 40-year-old man presents for a routine physical examination. During the visit, he discloses that he is HIV-positive and has not informed his wife. He refuses to tell her or allow…

A state epidemiologist is reviewing surveillance data for pertussis (Bordetella pertussis infection) across a region. The reported incidence increased from 4 cases per 100,000 popu…

A randomized controlled trial comparing two antihypertensive agents (amlodipine vs. lisinopril) enrolls 300 patients with Stage 2 hypertension. Patients are randomized 1:1 using a …

A 7 year old boy is diagnosed with acute lymphoblastic leukemia, and investigators design a case control study to evaluate household benzene exposure. They match each case to contr…

A researcher conducting a cross-sectional survey finds that patients with depression have higher rates of chronic pain compared to those without depression (OR = 3.2, 95% CI 2.1-4.…

A tropical region has consistently reported 15 to 20 malaria cases per 100,000 people annually for over a decade with minimal year-to-year variation. Recent surveillance data confi…

A 17-year-old girl presents to family medicine clinic requesting oral contraceptives and explicitly requests confidentiality from her parents. Vital signs are normal (BP 118/76, HR…

A 58-year-old male smoker with a 40-pack-year history presents with productive cough and dyspnea. Vital signs show BP 145/88, HR 98, RR 22, SpO2 88% on room air. A longitudinal stu…

A researcher designs two prospective studies to investigate whether dietary sodium restriction reduces the incidence of atrial fibrillation in older adults. Study A enrolls 200 nur…

A researcher compares crude mortality rates between a retirement community (mean age 72, BP 138/82, HR 68) and a nearby university town (mean age 24, BP 118/76, HR 62). The retirem…

A 45-year-old man with no significant past medical history undergoes genetic screening as part of a research study investigating protective factors against hereditary hemochromatos…

A 19-year-old woman presents to urgent care 18 hours after unprotected intercourse and requests emergency contraception. She is hemodynamically stable, denies gynecologic surgery o…

A screening program for colorectal cancer detects 95% of cases in people with the disease and correctly identifies 90% of people without the disease as disease-free. In the general…

A 58-year-old male smoker presents with chronic productive cough and dyspnea. Vital signs show BP 138/82, HR 92, RR 18, temperature 37.2°C, SpO2 92% on room air. Chest X-ray reveal…