Thyroid neoplasms are classified into three major categories: epithelial, nonepithelial, and
secondary. Most primary epithelial tumors of thyroid are derived from follicular cells. These …

A histologic classification of thyroid tumors is shown in Table 7.1. It incorporates main
principles of the current World Health Organization (WHO) classification of thyroid tumors. 1 …

Tumors of parafollicular cells and nonepithelial tumors occur less frequently than tumors
derived from follicular cells. This review summarizes the histologic and cytologic features of …

Every year, 18,000 new thyroid cancer cases are reported in the United States, representing
1.2% of the total number of new cancer cases of all sites. Thyroid cancer accounts for 1,200 …

The neuroendocrine lesions of the thyroid are few in number and include C-cell lesions (C-
cell hyperplasia and medullary carcinoma), mixed C-cell and follicular-derived tumors …

In spite of a complex variety of microscopic patterns, thyroid carcinoma can be classified
pathologically into four basic subtypes, each with a more or less predictable rate of growth …

Most thyroid neoplasms arise from follicular cells and are well differentiated. Anaplastic and
poorly differentiated carcinomas are rare and have a high mortality. Five percent of tumors …

Background: Although situated on the last places among the statistical hierarchy of human
malignancies, thyroid cancers (TC) are the most common tumors of the endocrine system …

Thyroid tumours have attracted great interest among clinicians and pathologists despite their
relative rarity. They exhibit a wide range of morphological and clinical features which may …

Cancers derived from the follicular epithelium (papillary, follicular, and poorly differentiated
(anaplastic) cancers) comprise about 60–95% of all thyroid carcinomas. The rest are, in …