Questões de USMLE

After an amniocentesis, a 29-year-old woman who is carrying twins learns that one fetus has XY chromosomes and the other has XX chromosomes. At 37 weeks' gestation, the female deli…

A 6-month-old girl is brought to the emergency department with fever (38.5°C), productive cough, and tachypnea (48 breaths/min). Her parents report recurrent episodes of sinusitis …

A pregnant female comes to her physician with questions about the effect that ingested substances may have on her unborn child. The physician explains that large molecules do not p…

A 4-year-old boy presents with recurrent lower respiratory tract infections and a chronic productive cough with foul-smelling sputum. Vital signs show temperature 38.2°C, heart rat…

A 2-month-old male presents with a firm, non-tender midline sacrococcygeal mass noted on routine physical examination. The mass is located just superior to the coccyx. Imaging show…

A 54-year-old man comes to the clinic because of 4 months of progressive difficulty swallowing solid foods. He has a 30 pack-year smoking history and drinks alcohol daily. Upper en…

A 5-year-old boy is brought to clinic by his parents for evaluation of developmental concerns. He was born with severe micrognathia and glossoptosis, which necessitated emergency t…

An autopsy is performed on a man who died of an unknown cause. The pathologist discovers that the deceased has a small atrial septal defect. The defect is seen in the portion of th…

A 67-year-old man presents with painless gross hematuria. Cystoscopy reveals a papillary bladder lesion, and biopsy is obtained from adjacent normal bladder mucosa. The normal epit…

An intravenous pyelogram is performed on a patient to evaluate the function and structure of her kidneys. Examination of the resulting radiographs reveals that the left kidney is n…

A 4-day-old male is brought to the pediatric clinic because of breathing difficulties and poor feeding. He coughs, chokes, and spits up milk very soon after beginning to suckle. Ph…

A 16-year-old girl presents to dermatology with a 6-month history of facial acne consisting of comedones, inflammatory papules, and pustules distributed across her forehead, cheeks…

A newborn male is found to have urethral openings along the ventral surface of the penis. The physician explains to the parents that the bilateral structures that should have fused…

A 2-day-old male newborn presents with persistent nonbilious vomiting after each feeding. Vital signs show HR 155 bpm, RR 42/min, temp 37.2°C, BP 65/40 mmHg. Upper GI imaging revea…

A cyanotic newborn presents with severe respiratory distress and tachycardia (HR 165/min). Chest X-ray demonstrates cardiomegaly with increased pulmonary vascular markings. Echocar…

A patient comes to the physician for a prenatal visit. Examination reveals that her uterus is considerably larger than her gestational age would predict. An ultrasound examination …

A 48-year-old man with chronic epigastric pain (BP 128/82, HR 88, RR 16, Temp 37.2°C) undergoes upper endoscopy. Duodenal biopsy reveals normal villous architecture with intact cry…

A 57-year-old man has hematuria and left-sided flank pain. Diagnostic studies show a left-sided renal mass with extension into the renal vein. A radical nephrectomy is performed, a…

A 68-year-old man with hypertension (BP 165/95 mmHg, HR 108/min, RR 20/min) dies from acute myocardial infarction complications. Autopsy reveals elevated cardiac troponin I (8.2 ng…

A 5-day-old male neonate presents with severe cyanosis, poor feeding, and respiratory distress. Vital signs show HR 168 bpm, RR 52/min, BP 52/28 mmHg, SpO2 68% on room air, and tem…

A 2-day-old male presents with a prominent, fluid-filled sac at the lumbosacral spine noted at delivery. Vital signs show HR 145 bpm, RR 48, BP 65/42, and temperature 37.2°C. Physi…

A 3-year-old boy presents with a midline neck mass that elevates with swallowing and tongue protrusion. Vital signs show BP 100/65, HR 98, RR 22, Temp 37°C, SpO2 98%. Physical exam…

During anatomy laboratory, a first-year medical student is dissecting the atrial chambers of the heart. At the upper border of the fossa ovalis, she discovers a small opening throu…

A 34-year-old woman presents with a 3-month history of progressive polyarticular joint pain and morning stiffness lasting more than 2 hours. Physical examination reveals symmetric …