A 14 yrs old girl on exposure to cold has pallor of extremities followed by pain and cyanosis. In later ages of life she is prone to develop?
**Core Concept**
Raynaud's phenomenon is a condition characterized by vasospastic episodes in response to cold or emotional stress, leading to pallor, pain, and cyanosis of the affected extremities. This condition is often associated with an imbalance in the sympathetic and parasympathetic nervous system, affecting blood flow to the extremities.
**Why the Correct Answer is Right**
The correct answer is associated with Raynaud's phenomenon due to the pathophysiological mechanism of vasospasm. In individuals with Raynaud's, the blood vessels in the extremities constrict in response to cold or stress, reducing blood flow and leading to pallor, pain, and cyanosis. This condition can be an early sign of an underlying systemic disease, such as autoimmune disorders or vasculitis.
**Why Each Wrong Option is Incorrect**
**Option A:** Buerger's disease is a type of vasculitis that affects the small and medium-sized arteries, but it is not typically associated with Raynaud's phenomenon.
**Option B:** Erythromelalgia is a condition characterized by burning pain, heat, and redness of the extremities, but it is not associated with cold exposure or vasospasm.
**Clinical Pearl / High-Yield Fact**
Raynaud's phenomenon can be an early sign of an underlying systemic disease, and patients with this condition should be screened for autoimmune disorders, vasculitis, or other systemic diseases.
**Correct Answer: B. Erythromelalgia is a condition characterized by burning pain, heat, and redness of the extremities, but it is not associated with cold exposure or vasospasm.