A middle-aged woman presents with symmetric color changes in the fingertips that cycle from white to blue to red, often triggered by cold. What condition is being described?

A middle-aged woman presents with symmetric color changes in the fingertips that cycle from white to blue to red, often triggered by cold. What condition is being described?

• A. Buerger's disease
• B. Raynaud's phenomenon
• C. Cryoglobulinemia
• D. Erythromelalgia

Answer: (B)

Raynaud phenomenon involves an exaggerated vasospastic response of the small vessels in the digits, especially to cold or stress. The classic pattern is a triphasic color change: white from abrupt vasoconstriction and reduced blood flow, blue from deoxygenation during sustained constriction, and red on reperfusion when blood flow returns. This sequence is most often symmetric and commonly presents in middle‑aged women, and it can be primary or secondary to an underlying connective tissue disease. The other conditions don’t fit this triphasic, cold-triggered pattern: Buerger’s disease causes inflammatory occlusion with ischemic damage and often ulcers in smokers; cryoglobulinemia involves vasculitis with symptoms like purpura and arthralgias; erythromelalgia produces burning pain and redness that worsens with warmth, not cold.

Raynaud phenomenon involves an exaggerated vasospastic response of the small vessels in the digits, especially to cold or stress. The classic pattern is a triphasic color change: white from abrupt vasoconstriction and reduced blood flow, blue from deoxygenation during sustained constriction, and red on reperfusion when blood flow returns. This sequence is most often symmetric and commonly presents in middle‑aged women, and it can be primary or secondary to an underlying connective tissue disease. The other conditions don’t fit this triphasic, cold-triggered pattern: Buerger’s disease causes inflammatory occlusion with ischemic damage and often ulcers in smokers; cryoglobulinemia involves vasculitis with symptoms like purpura and arthralgias; erythromelalgia produces burning pain and redness that worsens with warmth, not cold.