Raynaud's Phenomenon: A Current Update on Pathogenesis, Diagnostic Workup, and Treatment

Area of Science:

• Vascular Medicine
• Rheumatology
• Dermatology

Background:

• Raynaud's phenomenon (RP) is a vasospastic disorder affecting digits, triggered by cold or stress.
• It presents with characteristic color changes: pallor (vasoconstriction), cyanosis (deoxygenation), and erythema (reperfusion).
• RP can be primary (idiopathic) or secondary to autoimmune diseases (e.g., systemic sclerosis), vascular, or neurological conditions.

Purpose of the Study:

• To provide a comprehensive overview of Raynaud's phenomenon.
• To discuss the underlying pathophysiology, diagnostic methods, and current management strategies.
• To highlight recent advancements in therapeutic interventions.

Main Methods:

• Clinical diagnosis based on characteristic symptoms and physical examination.
• Nail fold capillaroscopy as the gold standard for differentiating primary from secondary RP.
• Vascular imaging for assessing ischemic injury and guiding preoperative decisions.

Main Results:

• Pathogenesis involves complex interactions affecting vascular tone, with functional abnormalities in primary RP and both functional and structural in secondary RP.
• Secondary RP is associated with a higher risk of digital tissue damage.
• Nail fold capillaroscopy is crucial for differential diagnosis.

Conclusions:

• Effective management of RP requires symptom alleviation and prevention of tissue damage.
• First-line treatments include lifestyle modifications and vasodilator medications like calcium channel blockers.
• Advanced therapies like endothelin receptor antagonists, botulinum toxin, sympathectomy, and fat grafting offer options for refractory or severe cases.