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If fine needle aspiration cytology (FNAC) suggests follicular neoplasm, thyroid lobectomy should be performed to establish the histopathological diagnosis. Features sine qua non for the diagnosis of follicular carcinoma are capsular invasion and vascular invasion by tumor cells.
Histopathology of NIFTP, H&E stain. [1]Noninvasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP) is an indolent thyroid tumor that was previously classified as an encapsulated follicular variant of papillary thyroid carcinoma, [2] necessitating a new classification as it was recognized that encapsulated tumors without invasion have an indolent behavior, [2] and may ...
Hyalinizing trabecular tumor (d–f) is composed of trabeculae of elongated or polygonal cells admixed with abundant amounts of hyaline material negative for amyloid and positive for type IV collagen (f); Ki-67 is characteristically expressed in the cell membrane but not in the nuclei of the tumor cells (e). Follicular adenoma with signet ring ...
A follicular variant of papillary thyroid cancer also exists. [35] Newly reclassified variant: noninvasive follicular thyroid neoplasm with papillary-like nuclear features is considered an indolent tumor of limited biologic potential. Follicular thyroid cancer (10 to 20% of cases [34]) – occasionally seen in people with Cowden syndrome.
Hürthle cell neoplasms can be separated into Hürthle cell adenomas and carcinomas, which are respectively benign and malignant tumors arising from the follicular epithelium of the thyroid gland. [6] The mitochondrial DNA of Hürthle cell carcinoma contain somatic mutations. [6] Hürthle cell carcinomas consists of at least 75% Hürthle cells. [7]
Poorly differentiated thyroid carcinoma is malignant neoplasm of follicular cell origin showing intermediate ... Larger than 5 cm in greatest diameter at diagnosis;
The indications to do FNAC are: nodules more than 1 cm with two ultrasound criteria suggestive of malignancy, nodules of any size with extracapsular extension or lymph nodes enlargement with unknown source, any sizes of nodules with history of head and neck radiation, family history of thyroid carcinoma in two or more first degree relatives ...
The Organization recognized two subtypes of ISLN: in situ follicular neoplasia (ISFN) and in situ mantle cell neoplasia (ISMCL). [1] ISFN and ISMCL are pathological accumulations of lymphocytes in the germinal centers and mantle zones , respectively, of the follicles that populate lymphoid organs such as lymph nodes .