Medullary Thyroid Carcinoma: A Contemporary PerspectiveDeLellis, Ronald A. MD; Mangray, Shamlal MB, BSAJSP: Reviews & Reports: July/August 2017 - Volume 22 - Issue 4 - p 196–208 doi: 10.1097/PCR.0000000000000205 Reviews Buy Abstract Author InformationAuthors Article MetricsMetrics Medullary thyroid carcinoma (MTC) is a thyroid neoplasm with evidence of C-cell differentiation that accounts for approximately 2% to 3% of all thyroid malignancies. Approximately 70% of MTCs are sporadic, whereas the remainder are heritable and occur as a component of the multiple endocrine neoplasia type 2 syndromes. Multifocal primary C-cell hyperplasia is the precursor of the familial cases. In the past several decades, there have been remarkable advances in the understanding of this tumor type and its precursor lesions at the clinical, histopathologic, and molecular genetic levels. This article presents an update on MTC and C-cell hyperplasia in the context of the 2017 World Health Organization Classification of Endocrine Tumors. From the Department of Pathology, Lifespan Academic Medical Center & Alpert School of Medicine of Brown University, Providence, RI. Reprints: Ronald A. DeLellis, MD, Rhode Island Hospital 593 Eddy St, APC 12, Providence, RI 02903. E-mail: email@example.com. The authors have no funding or conflicts to declare. © 2017 Lippincott Williams & Wilkins, Inc.