Calciphylaxis
Background
- Most commonly HD/ESRD patients (1% of ESRD)
- No available data in general population (non-uremic calciphylaxis)
- Calcium and phosphate levels rise beyond solubility and precipitate in arteries
- May be increasing due to widespread IV vitamin D
- Mortality as high as 60-80%; sepsis from necrotic skin lesions
Features
- Very painful lesions develop suddenly and progress rapidly
- Dermatolgic appearances:
- Livedo reticularis
- Stellate purpura
- Usually LEs, hands, or torso
DDx
- Brown recluse spider bite
- Bullous Pemphigoid
- Cellulitis, necrotizing fasciitis
- Erythema Nodosum
- Vasculitis
- Venous ulcers
Labs
- Serum PTH level
- CBC, CMP, phosphate, coags
- Inpatient - hepatitis panel, cryofibrinogen level, lipase, ESR, CRP, ANA, ANCA
