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15 Cards in this Set
- Front
- Back
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What is neoplasm?
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A new growth composed of cells, originally derived from normal tissues, that have undergone heritable genetic changes allowing them to become relatively unresponsive to normal growtj controls and to expand beyond their normal anatomic boundaries
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What is the difference between benign and malignant tumors?
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Benign tumors do not invade surrounding tissue or spread to new anatomic locations. Malignant tumors will invade locally and may metastisize.
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What is the difference between hyperplasia and hypertrophy?
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Hyperplasia is an increase in the number of cells in a tissue. Hypertrophy is an increase in individual cell size.
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What are some preneoplastic changes?
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Hyperplasia, metaplasia, and dysplasia
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What is metaplasia?
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Transformation of one differentiated cell type into another
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What is dysplasia?
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Abnormal pattern of tissue growth
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Hyperplasia and hypertrophy are not appropriate in descriptions of true neoplasms. T or F?
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True
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What does the name of the neoplasm reflect?
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The cell type from which the tumor is presumed to arise
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Which suffix implies that the tumor is benign?
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-oma
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Which suffix implies that the tumor is malignant?
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-sarcoma
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Where do mesenchymal tumors arise from?
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Cells of embryonic mesodermal origin
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What are malignant tumors of epithelial origin called?
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Carcinomas
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What are undifferentiated tumors?
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Malignant tumors that give no clue to their cell of origin
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What are mixed tumors?
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They contain multiple cell types derived from a single or multiple germ layers. Believed to arise from a single pluripotential or totiptential cell capable of differentiating into a variety of more mature cell types.
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What are hamartomas?
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Disorganized but mature mesenchymal or epithelial tissues found in their normal anatomic location
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