Coagulation Disorders USMLE Step 1 Practice Question
A 7 year old boy is brought for recurrent painful swelling of the knees and elbows after minor trauma. His maternal uncle had a similar disorder. Laboratory studies show normal platelet count and PT, but prolonged PTT that corrects on mixing study. Which of the following is the most likely diagnosis?
Answer choices
- AImmune thrombocytopenia
- BFactor VII deficiency
- CVon Willebrand disease
- DFactor VIII deficiencyCorrect answer
- EGlanzmann thrombasthenia
- FFactor V deficiency
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