What is papillary Microcarcinoma of thyroid?
Papillary thyroid microcarcinoma (PTMC) is a thyroid cancer with small tumors that are 1.0 cm maximum in diameter . The term “PTMC” was introduced for the first time by the World Health Organization (WHO) in 1989 .
What does foci mean in cancer?
Focus is a pathologic term describing cells that can be seen only microscopically. The cells stand out from surrounding tissue based on their appearance, special stains, or other testing. Foci is the plural of focus and implies only microscopic visualization of the tumor cells.
What is incidental papillary Microcarcinoma?
PTM is defined as a tumour focus that is ≤10 mm in size. Incidental PTM (I-PTM) is a tumour focus that is clinically unsuspected before thyroid surgery and is identified in the final pathological examination of a thyroidectomy specimen.
What does focal mean in biopsy?
What does focal mean? Focal is a word pathologists use to describe something seen in only a small part of the tissue sample examined. Focal changes can be seen when the tissue is examined by eye (this is called the gross examination) or under the microscope. The opposite of focal is diffuse.
What is thyroid papillary microcarcinoma?
Thyroid papillary microcarcinoma is a subtype of papillary carcinoma that included tumors with less than 10mm diameter. As a result of diagnostic methods improvement, prevalence of this tumor is increasing. In this study we reviewed different characteristics of tumor. Methods:
Is papillary thyroid cancer multifocality associated with poor prognosis?
… Papillary thyroid cancer (PTC) often presents as multifocal. However, the association of multifocality with poor prognosis remains controversial. The aim of this retrospective study was to identify the characteristics of PTC with multiple foci and to evaluate the association between multifocality and prognosis.
What is multifocality in thyroid cancer?
Multifocality was defined as 2 or more tumor foci within the thyroid. For multifocal tumors, the diameter of the largest tumor focus was taken as the primary tumor.
What is the prevalence of papillary thyroid microcarcinoma (PTMC)?
Up to 43% of all thyroid cancers are papillary thyroid microcarcinomas (PTMCs) and nearly 50% of new cases of papillary thyroid carcinoma (PTC) are PTMCs (13,72).