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.Continue Reading
A sessile polyp is a type of polypoid lesion, but it doesn't have the characteristic stalk of most polypoid lesions. Flat polyps may also be found within the colon. This type of lesion doesn't have a raised surface and can be difficult to detect from the surrounding colonic mucosa.
Most lesions found during a colonoscopy examination turn out to be polypoid lesions. A study conducted by Henry Ford Hospital found that more than half the polypoid lesions discovered during its five-year study were benign. The study found little evidence that polypoid lesions automatically lead to a colon cancer diagnosis.
However, the study found that villous adenomatous lesions generally do contain cancerous cells, especially if the adenomatous lesion is large. Resection of the lesion or resection of particular segments of the bowel may be necessary to prevent the spread of any infiltrating cancer from these types of lesions.Learn more about Biology
Escherichia coli, or E. coli, is a rod-shaped, gram-negative, facultatively anaerobic bacteria occurring naturally in the intestines of humans and most other warm-blooded animals, explains the Centers for Disease Control and Prevention. While some E. coli strains do cause illness, most are harmless.Full Answer >
A post-absorptive state is a metabolic period that occurs when the stomach and intestines are empty. During a post-absorptive state, the body's energy needs are fulfilled from energy previously stored in the body. This state is typically reached four or more hours after food has been consumed, usually overnight and in the morning before breakfast.Full Answer >
Escherichia coli, commonly known as E. coli, is a bacteria that colonizes the intestines of humans and animals, and most types of it are harmless, according to the Centers for Disease Control. There are over 700 types of E. coli, notes Todar's Online Textbook of Bacteriology.Full Answer >
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.Full Answer >