When a Biopsy Is Inadequate in Diagnosing Calciphylaxis.

Calciphylaxis is a rare disease that typically presents in patients with end-stage renal disease and can be a diagnostic challenge. Calcium deposition with fibrin thrombi and necrosis of the overlying epidermis may support the diagnosis; however, depending on the stage of the disease, skin biopsy can have low sensitivity and specificity, and may be contraindicated in some situations. We discuss the utility of imaging studies in supporting the diagnosis of calciphylaxis. ( SKINmed . 2022;20:450-451).