Question
Which of the following is not a common site of involvement in Takayasu’s arteritis?
| A. |
Subclavian artery
|
| B. |
Common carotid artery
|
| C. |
Abdominal aorta
|
| D. |
Pulmonary artery
|
Show Answer
|
Correct Answer » D
Explanation
|
|
- Takayasu arteritis is a chronic granulomatous large-vessel vasculitis affecting the aorta and its major branches.
- It predominantly affects young women (<40 years) and is also known as the “pulseless disease.”
Explanation of the Correct Answer
- Pulmonary artery involvement can occur in Takayasu arteritis but is uncommon compared with involvement of the aorta and its major branches.
- Therefore, among the given options, the pulmonary artery is not a common site of involvement.
Why Other Options are Incorrect
A. Subclavian artery
- The most commonly affected artery in Takayasu arteritis.
- Stenosis causes:
- Absent or diminished upper limb pulses.
- Arm claudication.
- Blood pressure discrepancy between arms.
B. Common carotid artery
- Frequently involved.
- May cause:
- Carotidynia.
- Dizziness.
- Syncope.
- Transient ischemic attacks (TIA) or stroke.
C. Abdominal aorta
- Commonly involved, particularly in Asian patients.
- May lead to:
- Renovascular hypertension.
- Mesenteric ischemia.
- Lower limb claudication.
