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Path 5
Neoplasia I
| Question | Answer |
|---|---|
| How is Neoplasm different from hyperplasia | Neoplasm is abnormal growth of tissue Hyperplasia is an increase in teh number of cells within an organ or tissue |
| Does hyperplasia respont to normal regulatory growth control mechanisms | yes |
| what is metaplasia | a reversible change in which one mature cell type is replaced by another mature cell type |
| what is dysplasia | potentially reversible change characterized by atypical cellular features and increased mitotis rate |
| what are the two main examples of names that end in -oma that are actually malignant | Carcinoma and Sarcoma |
| What is the origin of carcinomas | epithelial origin |
| what is the origin of sarcomas | mesenchymal / connective tissue origin |
| Leiomyo- indicates? | Smooth muscle |
| Lipo- indicates? | adipose tissue |
| rhabdomyo- indicates? | skeletal muscle |
| Scirrhous indicates? | hard |
| Medullary indicates? | soft resembling bone marrow |
| colloid indicates? | gelatinous mucinous |
| what are two exceptions to the rule of -oma being benign unless called carcinoma or sarcoma | melanoma and lymphoma |
| what is cellular differentiation | extent to which neoplastic cells resemble normal cells |
| What type of differentiation is exhibited by Benign Neoplasms | well-differentiated |
| what grows faster benign or malignant neoplasms | malignant |
| how to benign vs. malignant tumors differ in respect to mode of growth | benign grows by expansion and malignant grows by invasion |
| What is growth fraction? | proportion of cells within a tumor population that are in the replicative pool? |
| why does doubling time increase as the tumor size increases | tumor outgrows blood supply |
| what is the most common route of metastasis | lymphatic spread |
| what is the characteristic route of spread of carcinomas | Lymphatic spread |
| what is the characteristic spread of sarcomas | Hematogenous spread |
| what are two common sites of hematogenous spread | lung and liver |
| what does grade refer to? | degree of differentiation |
| what is staging based on? | TNM (Tumor, Nodes, Metastases) |