According to Genes & Development, a heterogeneous mass in biology is a tumor with both normal cells and neoplastic cells, which are cells of abnormal growth tissue. Heterogeneous masses are called solid tumors and can be cancerous.Know More
Dr. Barry T. Kahn from HealthTap explains that heterogeneous masses can be malignant or benign. Depending on the size, heterogeneous masses need to be removed and examined for malignancy. Some heterogeneous masses on the ovaries resolve on their own.
Wikipedia goes on to explain that the heterogeneity of cancerous masses makes it difficult to treat cancer because the cells have different forms, gene expressions, motility and metabolism. For example, some of the cells in tumors are cancer stem cells, which can in turn form more tumors. Moreover, there are differences in cancer stem cells. These differences in cancer cells occur in part because of mutations, gene instability, impaired DNA and outside or environmental influences. All of these different and varying cells make the tumor itself heterogeneous and difficult to treat. Drug administration, one treatment option for cancer, does not kill all the different kinds of cancerous cells in a tumor.
Cancers that have heterogeneous masses include breast cancer, prostate cancer, colon cancer, brain cancer, myeloma and leukemia, Wikipedia states.Learn More
A dependent variable in biology is an element that is being tested. It relies on the independent variable, or that aspect of the experiment that the scientist has control over and changes to observe the results on the dependent variable.Full Answer >
A polypoid lesion is a tumor that may or may not have a stalk and is located within the colon of the intestines. A polypoid lesion may be either non-neoplastic, or benign, or it may be adenomatous, or cancerous. Polypoid lesions within the colon are only diagnosed through a colonoscopy, and a lesion is generally biopsied and sent to a laboratory to determine its pathology.Full Answer >
The niche that an organism occupies is the opening in the environment that the organism fills to make a living. A species' niche is its place in an ecosystem relative to the other organisms present.Full Answer >
A codon is a group of three nucleotide bases in either DNA or RNA that stands for a certain amino acid, which is the building block of proteins. The nucleotide bases are adenine (A), cytosine (C), guanine (G) and either thymine (T) or uracil (U), depending on the nucleic acid.Full Answer >