Gross Anatomy USMLE Step 1 Practice Question
A 21-year-old male is brought to the hospital by emergency medical technicians after he was involved in a car accident. Examination reveals a clear fluid draining from his left ear. Laboratory studies confirm that the fluid is cerebrospinal fluid. Which of the following is the most likely site of trauma that has resulted in the leakage of this fluid?
Answer choices
- AFracture in the region of the internal auditory meatus, along with rupture of the tympanic membrane
- BFracture in the region of the jugular foramen, along with rupture of the tympanic membrane
- CFracture of the external ear canal, along with rupture of the tympanic membrane
- DFracture of the floor of the anterior cranial fossa, along with rupture of the tympanic membrane
- EFracture of the floor of the middle cranial fossa, along with rupture of the tympanic membraneCorrect answer
- FFracture involving the mastoid air cells, along with rupture of the tympanic membrane
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