The correct answer is E. Male Gender.
Known risk factors for calciphylaxis include end-stage renal disease, hemodialysis, obesity, diabetes mellitus, and female gender as well as warfarin and liver disease. Hyperparathyroidism, calcium supplementation, and vitamin D intake are additional risk factors, with the latter possibly related to the differentiation of vascular smooth muscle cells into osteoblast-like cells.
WA Wilmer, CM Magro: Calciphylaxis: emerging concepts in prevention, diagnosis and treatment. Semin Dial. 15:172-186 2002 PMID 12100455