Embryology USMLE Step 1 Practice Questions
54 board-style USMLE Step 1 questions in Anatomy. Each question shows the correct answer; create a free account for the full explanation and adaptive practice.
- USMLE Step 1 · medium1. A 22-year-old woman comes to the physician for a routine health maintenance examination. She has no history of serious illness. Pelvic examination shows a pink, 2 x 2 cm, fluctu…
- USMLE Step 1 · hard2. 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 s…
- USMLE Step 1 · medium3. 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 emergenc…
- USMLE Step 1 · medium4. A 16-year-old girl presents with primary amenorrhea and is found to have absent uterus and fallopian tubes on pelvic ultrasound, but normal ovarian function with appropriate sec…
- USMLE Step 1 · easy5. A 4-week-old male infant presents to the pediatrician with a firm, painless midline neck mass that the parents first noticed 2 weeks ago. On examination, the mass is located bet…
- USMLE Step 1 · medium6. 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…
- USMLE Step 1 · easy7. A 2-month-old girl is brought to the emergency department by her parents who noticed a pulsatile abdominal mass during diaper changes. The infant has been feeding poorly over th…
- USMLE Step 1 · easy8. A 3-day-old male neonate presents with polyhydramnios noted prenatally and respiratory distress at birth. Examination reveals excessive drooling and inability to pass a nasogast…
- USMLE Step 1 · hard9. A 3-month-old female infant presents with persistent cyanosis, poor feeding, and failure to thrive. Vital signs show HR 145 bpm, RR 42/min, SpO2 78% on room air, BP 88/54 mmHg,…
- USMLE Step 1 · easy10. A 3-week-old infant presents to the pediatric clinic with a mother concerned about a painless, firm midline neck mass. On examination, the mass is located between the hyoid bone…
- USMLE Step 1 · medium11. A 2-week-old female infant is found to have imperforate anus (no anal opening) on physical examination. Imaging reveals the rectum ends in a fistula that connects to the urethra…
- USMLE Step 1 · medium12. A 2-day-old male infant born at 38 weeks gestation presents with excessive drooling, respiratory distress, and cyanosis that worsens with feeding attempts. His mother had polyhy…
- USMLE Step 1 · medium13. A 9-day-old male infant is admitted with bilious vomiting, abdominal distension, and inability to pass meconium. His mother reports that vomiting began 6 hours after his first f…
- USMLE Step 1 · hard14. A 5-year-old boy is brought to the clinic by his parents for evaluation of constipation and a visible mass at the base of his spine. Physical examination reveals a firm, non-ten…
- USMLE Step 1 · medium15. A 3-day-old newborn presents with cyanosis and severe respiratory distress. Vital signs show HR 168 bpm, RR 52/min, BP 55/32 mmHg, SpO2 78% on room air, and temperature 37.2°C.…
- USMLE Step 1 · medium16. A 3-month-old boy is brought to the emergency department with failure to thrive, irritability, and pallor. On examination, a firm abdominal mass is palpable below the right cost…
- USMLE Step 1 · hard17. A 7-year-old boy is brought to the clinic by his mother with a 2-year history of recurrent pneumonias and difficulty swallowing solid foods. His parents report he often chokes w…
- USMLE Step 1 · medium18. A 2-day-old male born at term presents with excessive drooling, respiratory distress with episodes of cyanosis during feeding attempts, and choking. The mother reports polyhydra…
- USMLE Step 1 · easy19. 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 e…
- USMLE Step 1 · hard20. A 2-month-old girl is brought to the emergency department with severe respiratory distress (RR 60/min, SpO2 76% on room air) and cyanosis. Physical examination reveals bilateral…
- USMLE Step 1 · medium21. A 6-week-old male is brought to the pediatric clinic by his mother, who noticed a soft, painless mass on the right side of his neck present since birth. Vital signs are normal.…
- USMLE Step 1 · hard22. 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…
- USMLE Step 1 · easy23. A 2-year-old child presents with a midline neck mass. Vital signs show HR 98/min, RR 22/min, BP 95/62 mmHg, temperature 37.2°C, SpO2 98% on room air. Physical examination reveal…
- USMLE Step 1 · medium24. A 3-day-old male infant presents with respiratory distress and cyanosis. Vital signs show HR 168 bpm, RR 52/min, BP 58/32 mmHg, SpO2 88% on room air. Prenatal ultrasound at 18 w…