Calciphylaxis: a still unmet challenge

Area of Science:

• Nephrology
• Dermatology
• Vascular Biology

Background:

• Calcific uremic arteriolopathy (CUA), also known as calciphylaxis, is a rare and severe condition primarily affecting patients with end-stage renal disease.
• Characterized by painful skin lesions and ulcerations, CUA results from calcification and occlusion of small cutaneous arterioles.
• The disease carries a high mortality risk due to associated infections and cardiovascular complications.

Purpose of the Study:

• To review the current understanding of calcific uremic arteriolopathy, encompassing its pathophysiology, clinical presentation, disease progression, and therapeutic strategies.
• To synthesize existing literature data with personal clinical experiences to provide a comprehensive overview.

Main Methods:

• Conducted a literature search using terms 'calciphylaxis' and 'calcific uremic arteriolopathy'.
• Summarized current knowledge on the disease's pathophysiology, clinical features, course, and treatment options.
• Integrated personal treatment experiences with findings from the literature review.

Main Results:

• CUA development is linked to a complex interplay of local and systemic risk factors, with incomplete understanding of the underlying pathophysiology.
• Patients with advanced chronic kidney disease (CKD) and those on dialysis are particularly susceptible.
• Therapeutic approaches include optimizing dialysis, managing CKD-mineral and bone disorder, experimental anticalcification treatments, and wound care, though evidence is primarily from case reports and series.

Conclusions:

• Despite current interventions, calciphylaxis continues to have a poor prognosis, highlighting the urgent need for further research into prophylaxis and treatment.
• Existing treatment strategies may offer some benefit in disease management but their impact on overall mortality remains uncertain.