This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and breast, Subject name: Surgery
Calciphylaxis is more commonly seen in 
Select and explain. 
A. Primary hyperparathyroidism, B. Secondary hyperparathyroidism, C. Teritiary hyperparathyroidism, D. Pseudo hyperparathyroidism
B: Secondary hyperparathyroidism
Answer: B: Secondary hyperparathyroidism 
Explanation: Calciphylaxis (calcific uraemic aeriolopathy) is a syndrome of disseminated calcification resulting in both vascular calcification and skin necrosis. It accounts for approximately 4% of patients undergoing surgical intervention for secondary hyperparathyroidism. It presents with expanding painful cutaneous purpuric lesions, predominantly on the extremities, although it can also be seen on the lower abdomen.Ref: Bailey and Love 27e pg: 831