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Neoplasms or Tumours
Ross & Wilson Chapter 3: Neoplasms or Tumours
| Question | Answer |
|---|---|
| What is a tumour/neoplasm? | A mass of tissue that proliferates faster than normal and doesn't die when other cells do |
| Slow growth and cells well differentiated: benign or malignant? | Benign |
| Usually encapsulated and no distant spread: benign or malignant? | Benign |
| Rapid growth and cells poorly differentiated: benign or malignant? | Malignant |
| Not encapsulated and spreads: benign or malignant? | Malignant |
| How do malignant tumours spread? (metastasises) (4) | - By local infiltration - Via lymph - Via blood - Via body cavities |
| What causes a tumour? | Mutations within the cell's genetic material |
| How do mutations happen? | Either spontaneous, exposure to a carcinogen or inherited |
| What is a carcinogen? | A mutagenic agent. Causes malignant changes in cells by damaging their DNA |
| Types of carcinogen? (4) | - Chemical - Ionising radiation - Oncogenic viruses - Host factors |
| Which oncogenic virus can cause liver cancer? | Hepatitis B virus |
| Which oncogenic virus can cause cervical cancer? | Human Papilloma Virus (HPV) |
| How do oncogenic virus' work? | Viruses enter cells and incorporate their DNA or RNA into the host cell's genetic material, which causes mutation |
| Which host factors can influence susceptibility to tumours? | - Race - Age - Inherited factors - Diet - Smoking - Exercise levels - Body weight |
| What is mild dysplasia: cell differentiation? | The tumour cells keep most of their normal features. Parent cells can usually be identified |
| What is anaplasia: cell differentiation? | The tumour cells have lost most of their normal features. Parent cells cannot be identified |
| In TMN what does T stand for? | Tumour size |
| In TMN what does M identify? | Identifies metastatic sites |
| In TMN what does N indicate? | Affected regional lymph nodes |
| Common metastatic sites for primary bronchi tumour? | Adrenal glands, brain |
| Common metastatic sites for primary prostate gland tumour? | Pelvic bones, vertabrae |