A 24-year-old woman presents with episodic finger color changes during winter exposure. She reports digits turning white, then blue, and finally red upon rewarming. Vital signs today: BP 118/76, HR 78, RR 16, Temp 37°C, SpO2 98% on room air. Physical examination between episodes is normal with intact peripheral pulses. Nailfold capillaroscopy shows normal findings. She denies Raynaud phenomenon-associated symptoms such as digital ulcers or tissue loss. Which of the following best explains this condition?
- A)Calcific stenosis of the brachial artery
- B)Thrombotic occlusion due to tobacco exposure
- C)Immune complex vasculitis of medium sized vessels
- D)Transient vasospasm of small arteries and arteriolesGABARITO
- E)Fixed atherosclerotic obstruction of the digital arteries
Explicação
Raynaud phenomenon is caused by episodic vasospasm of small arteries and arterioles, usually triggered by cold or emotional stress. The classic triphasic color change is white, blue, then red with reperfusion. Normal examination between episodes supports prima... Ver explicação completa e trilha adaptativa →