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In modern English, tumor (non-US spelling: tumour) is used as a synonym for a neoplasm (a solid or fluid-filled cystic lesion that may or may not be formed by an abnormal growth of neoplastic cells) that appears enlarged in size. [12] [13] Some neoplasms do not form a tumor; these include leukemia and most forms of carcinoma in situ.
Some sources require the included tissue types to be neoplastic for the definition of mixed tumor. [1] A "false" mixed tumor contains one type of neoplastic cells, but which have more than one appearance. For example, benign pleomorphic salivary gland tumors may have some tumors cells that form pseudocartilage.
Hematological malignancies are malignant neoplasms ("cancer"), and they are generally treated by specialists in hematology and/or oncology. In some centers "hematology/oncology" is a single subspecialty of internal medicine while in others they are considered separate divisions (there are also surgical and radiation oncologists).
Symptomatic features of paraneoplastic syndrome cultivate in four ways: endocrine, neurological, mucocutaneous, and hematological.The most common presentation is a fever (release of endogenous pyrogens often related to lymphokines or tissue pyrogens), but the overall picture will often include several clinical cases observed which may specifically simulate more common benign conditions.
For example, a lipoma is a common benign tumor of fat cells , and a chondroma is a benign tumor of cartilage-forming cells (chondrocytes). Adenomas are benign tumors of gland-forming cells, and are usually specified further by their cell or organ of origin, as in hepatic adenoma (a benign tumor of hepatocytes , or liver cells).
Benign neoplasms (1 C, 64 P) Breast neoplasia (1 C, 11 P) C. Connective/soft tissue tumors and sarcomas (2 C, 9 P) D. ... Non-islet cell tumor hypoglycemia; P ...
Carcinoma in situ (CIS) is a group of abnormal cells. [1] [2] While they are a form of neoplasm, [3] there is disagreement over whether CIS should be classified as cancer.This controversy also depends on the exact CIS in question (e.g., cervical, skin, breast).
The neoplastic grading is a measure of cell anaplasia (reversion of differentiation) in the sampled tumor and is based on the resemblance of the tumor to the tissue of origin. [1] Grading in cancer is distinguished from staging , which is a measure of the extent to which the cancer has spread .