Saccular aneurysm
Pathology
Adverse effects of drugs on the nervous system
Cerebrovascular disease
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Nervous system and special senses pathology review
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Assessments
Flashcards
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USMLE® Step 1 questions
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High Yield Notes
18 pages



Flashcards
Saccular aneurysm
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Questions
USMLE® Step 1 style questions USMLE
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A 40-year-old man with a history of autosomal dominant polycystic kidney disease presents to the emergency department for evaluation of a sudden onset severe headache. An hour ago, the patient woke up suddenly with an excruciating headache that reached maximum intensity within seconds. His additional medical history includes hypertension and a 20 pack year smoking history. Temperature is 37.0°C (98.6°F), pulse is 110/min, and blood pressure is 150/90 mmHg. On physical examination, nuchal rigidity is noted. A non-contrast CT of the head is obtained and is unremarkable. A lumbar puncture is performed. Which of the following is most likely to be found on further evaluation of this patient’s cerebrospinal fluid?
External References
First Aid
2024
2023
2022
2021
Anterior communicating artery
saccular aneurysm p. 529
Mydriasis
saccular aneurysm p. 529
Ptosis (eyelids)
saccular aneurysm p. 529
Summary
A saccular aneurysm is a round bulge in the wall of a blood vessel, usually an artery. Saccular aneurysms are the most common form of cerebral aneurysm and are caused by a weakening of the vessel wall, which can be caused by aging, high blood pressure, cigarette smoking, and genetic factors. An aneurysm can rupture and cause internal bleeding, which is a serious and life-threatening emergency condition that needs prompt management. Treatment for a saccular aneurysm usually involves open surgery or endovascular repair.