What is the Meaning & Definition of Neoplasia

Neoplasia is a type of pathological formation of a tissue, whose components will replace the normal tissues. Neoplasia occurs a plenty of cells multiplication, either in an organ or a tissue, which result in the formation of a neoplasm. To the neoplasm that forms a differential mass it is popularly known as tumor, can be benign or malignant, although, it may happen that some Neoplasms do not produce tumors, such is the case of leukemia and the cervical intraepithelial neoplasia. Many types of cancers are malignant neoplasms.
Usually, neoplastic tumors contain more than one type of cell but its origin and continued development depend on a single population of neoplastic cells. This type of cell are clonal, implying that they be of a single stem cell.
Then, there are two types of neoplasms, benign and malignant, benign neoplasms are localized tumors, limited growth, regular appearance and well differentiated cells. A neoplasm of this type will not become in metastasis or invade adjacent tissue. On the contrary, in malignant neoplasms, abnormal cells multiply without any control and certainly can invade nearby tissues. In addition, its dissemination is almost a fact, reaching different parts of the body through the bloodstream and lymphatic system.
The most recurrent malignancy criteria include the following: growth disordered cells, nuclei have an enormous amount of DNA, there is disorder in the form and size of the cytoplasm, the malignant cell produces collagen around, there is involvement of the blood vessels, cell differentiation and metastasis at distance, among others.