Benign FDNs comprise "thyroid follicular nodular disease", follicular thyroid adenoma (FTA), FTA with papillary architecture, and oncocytic adenoma (OA). "H眉rthle cell adenoma/carcinoma" is renamed oncocytic adenoma/carcinoma of the thyroid (OA/OCA), which can be disti...
Infollicular adenocarcinomas,the majority of tumor cells are arranged in a recognizable follicular pattern.It is possible to subdivide follicular carcinomas further on the basis of size of follicles, as described for follicular adenomas, but this often is difficult because of the admixture o...
Aspirates of cellular adenomas usually contain numerous follicular cells with little or no colloid. Follicular cells are usually grouped in syncytial tissue fragments, with a microfollicular or trabecular pattern (microfollicular adenoma and trabecular adenoma, respectively). The follicular cells of ...
but not of benign thyroid (A,C). Arrowheads indicate microvessels with red blood cells in non-neoplastic thyroid tissue. Note absence of PSMA expression by benign or neoplastic epithelium, except one case of PDTC (F). (A) Benign thyroid. (B) Follicular adenoma. ...
Localized parathyroid surgery for primary hyperparathyroidism then allows for both definitive treatment and diagnostic tissue to confirm parathyroid adenoma. On a cellular level, recognizing the relationship of tumors to the cells of origin including "follicular-derived" in thyroid versus from C-cells ...
This entity may represent a source of diagnostic error, since it can be easily misinterpreted as a macrofollicular adenoma or nodular goiter. Design.--In this study, we describe 3 cases of papillary carcinoma of the thyroid with a macrofollicular growth pattern and review the literature. Results...
(a) Normal thyroid cells give rise to two principle types of neoplasms, follicular neoplasms (follicular adenoma and follicular carcinoma), and papillary thyroid carcinoma. Whereas follicular neoplasms sometimes show slight coarsening of chromatin (as in this example), the distinction between a ...
where it showed weak positivity in some cases of lymphocytic thyroiditis and one case of follicular adenoma, it was noted that these cells were adjacent to the cancerous tissue itself. HBME-1 has already been linked to follicular carcinoma, multinodular goitre and follicular adenoma [29]. More...
The distinction between follicular thyroid adenoma and follicular thyroid carcinoma cannot be made on cytologic grounds and instead can only be determined after excision; invasion through the tumor capsule or vascular invasion outside the capsule are the criteria for carcinoma. In (N) (H&E), there...