Search results
Results from the WOW.Com Content Network
However, metaplasia or dysplasia does not always progress to neoplasia and can occur in other conditions as well. [3] ... Neoplasm vs. tumor
Micrograph showing apocrine metaplasia of the breast with typical features [3] H&E stain. Barrett's esophagus is an abnormal change in the cells of the lower esophagus, thought to be caused by damage from chronic stomach acid exposure. The following table lists some common tissues susceptible to metaplasia, and the stimuli that can cause the ...
Metaplasia occurs when a cell of a certain type is replaced by another cell type, which may be less differentiated. It is a reversible process thought to be caused by stem cell reprogramming. Stem cells are found in epithelia and embryonic mesenchyme of connective tissue. A prominent example of metaplasia involves the changes associated with ...
Hürthle cell neoplasms can be separated into Hürthle cell adenomas (benign tumours) and carcinomas (malignant tumours) [5] arising from the follicular epithelium of the thyroid gland. [6] The latter is a relatively rare form of differentiated thyroid cancer, accounting for only 3-10% of all differentiated thyroid cancers, [ 7 ] and was ...
For this reason, CIS will usually not form a tumor. Rather, the lesion is flat (in the skin, cervix, etc.) or follows the existing architecture of the organ (in the breast, lung, etc.). Exceptions include CIS of the colon (polyps), the bladder (preinvasive papillary cancer), or the breast (ductal carcinoma in situ or lobular carcinoma in situ).
The term dysplasia is typically used when the cellular abnormality is restricted to the originating tissue, as in the case of an early, in-situ neoplasm. [ citation needed ] Dysplasia, in which cell maturation and differentiation are delayed, can be contrasted with metaplasia , in which cells of one mature, differentiated type are replaced by ...
Hürthle cell neoplasm is a rare tumor of the thyroid, typically seen in women between the ages of 70 and 80 years old. When benign, it is called a Hürthle cell adenoma , and when malignant it is called a Hürthle cell carcinoma .
However, that theory is also controversial since Hashimoto's thyroiditis and chronic lymphocytic thyroiditis (neoplasms to be shown [clarification needed] squamous metaplasia) are not associated with SCT. Primary STC is usually diagnosed in both lobes of the thyroid gland. The histopathology of STC shows a squamous differentiation of tumor cells.