Review: Categories of Cancer
Here is what we have learned from Categories of Cancer:
- Cancers can be classified based either on histological type or their primary site (the location where the cancer originated).
- Derivation of cells and tissues starts with cell differentiation, which refers to the process of cells becoming arranged into three distinct germ layers: an outer ectoderm, an inner endoderm, and a mesoderm in between.
- All of the organs of the body develop or differentiate from these three primary germ layers.
- Tissue is composed of a group of cells that are similar in structure and perform one or more common functions.
- Five major categories of cancer, based on their histological characteristics, are: carcinoma; sarcoma; myeloma; leukemia; and lymphoma. In addition, there are also some mixed types.
- The most common sites in which cancer develops include the skin, lungs, female breasts, prostate, colon and rectum, and uterus.
Go to the quiz if you want to test yourself on the material you learned in this section. The quiz is a self-assessment tool and no records are kept. The feedback will let you know if you have answered the questions correctly. You can take the quiz as many times as you want.