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Papillary thyroid cancer (papillary thyroid carcinoma, [1] PTC) is the most common type of thyroid cancer, [2] representing 75 percent to 85 percent of all thyroid cancer cases. [1] It occurs more frequently in women and presents in the 20–55 year age group.
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 ...
A papillary tumor is a tumor shaped like a small mushroom, with its stem attached to the epithelial layer (inner lining) of an organ. [1] [2] It consists of papillae, which are outgrowths that consist of stroma with at least one central blood vessel, surrounded by epithelium. Usually, the epithelium constitutes the true tumor cells, and the ...
This is a shortened version of the second chapter of the ICD-9: Neoplasms. It covers ICD codes 140 to 239 . The full chapter can be found on pages 101 to 144 of Volume 1, which contains all (sub)categories of the ICD-9.
Intra-ampullary papillary–tubular neoplasms (IAPN) are precancerous neoplasms of the ampulla of Vater. [1] On histological examination the neoplasms exhibit both papillary and tubular features. [2] IAPN were first described in 2010. [1] They are rare; comprising 0.5% of gastrointestinal tumours. [1]
Papillae vs pseudopapillae: True papillae are outgrowths of epithelium, surrounding fibrovascular cores of stroma and at least one blood vessel. In contrast, pseudopapillae (such as in solid pseudopapillary tumours) are nests of proliferating cells that eventually grow to become almost back-to-back, with cells in the centers of nests disintegrating, leaving rims of cells lining the periphery ...
They cannot be reliably differentiated from low grade papillary urothelial carcinomas using cytology, [1] and their diagnosis (vis-a-vis low grade papillary urothelial carcinoma) has a poor inter-rater reliability. [2] Pathologic grading and staging tumors are: graded by the degree of cellular atypia (G1->G3), and staged: [citation needed ...
Papillary tumors of pineal region are extremely rare, constituting 0.4-1% of all central nervous system tumors. [3] These tumors most commonly occur in adults with the mean age being 31.5. There have been cases reported for people between the ages 5 to 66 years.