Misc for Cancer Flashcards
Resemble base cell, considered pre-cancerous
Metaplastic (e.g. Barrrett’s esophagus)
Excess of cell growth.
hyperplasia (e.g. benign tumors)
abnormal cell growth. Cells don’t appear normal.
dysplasia
absence of any normalcy to the cell
anaplasia
Normal process which occurs over many cell cycles and allows a cell to specialize in certain tasks.
Cell Differentiation
Cell proliferation has four hallmark growth patterns
- growth RATE is unchanged
- Mitosis leads to abnormal cell division (more cells)
- The cells grow outside of normal times
- The cells are unaffected by contact inhibition
Cancer grows quickly (proliferates) because multiple cells grow at once instead of one at a time after apoptosis. This is referred to as _____ ____.
Doubling Time
Characteristics of a benign neoplasm (6)
- Localized growth
- often easily removed
- do not reoccur
- forms a solid mass
- has well defined borders
- frequently encapsulated
Characteristics of a malignant neoplasm include (5)
- Grow aggressively
- metastasize to distant sites
- not always easy to remove
- can reoccur
- have irregular shape
In situ refers to a tumor that has not _______.
spread
The stage of carcinogenesis in which the cell seems normal but is predisposed to proliferate excessively. This cell has already been exposed to some carcinogen.
Initiation
The stage of carcinogenesis in which the cell proliferates more rapidly; it also undergoes structural changes.
Promotion
The stage of carcinogenesis in which the cell grows uncontrollably and looks obviously deranged.
Progression
The function and dysfunction of protooncogenes
- activate cell growth
2. mutated into oncogenes and promote cancer cell growth
The function and dysfunction of tumor suppressor genes
- Turns off cell growth
2. Mutation causes immune system to stop the tumor suppressor gene from functioning