INSM1 and neoplasm: A tissue microarray series of 111 cases consisting of normal parathyroid (n = 14), primary hyperplasia (n = 15), secondary hyperplasia (n = 10), tertiary hyperplasia (n = 11), adenomas (n = 50), atypical adenomas (n = 7), and carcinomas (n = 4) revealed no INSM1 expression in parathyroid normal tissue, hyperplasia or neoplasms [38].