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Poorly differentiated thyroid carcinoma (PDTC) is malignant neoplasm of follicular cell origin showing intermediate histopathological patterns between differentiated and undifferentiated thyroid cancers. ==Histopathological features== *Presence of small cells with round nuclei and scant cytoplasm with a diffuse solid pattern *Round or oval nests (insulae) or in trabeculae. *Solid growth and presence of microfollicles, some of which contain dense colloid. *Extrathyroidal extension and blood vessel invasion *Foci of necrosis, * Larger than 5 cm in greatest diameter at diagnosis 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Poorly differentiated thyroid cancer」の詳細全文を読む スポンサード リンク
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