22 Questions
What is the primary characteristic of neoplasia?
Abnormal proliferation of cells that is spontaneous and irreversible
What is the main difference between benign and malignant tumors?
Benign tumors are well-circumscribed and malignant tumors are infiltrative
What is the suffix commonly added to benign tumors?
-oma
What is the term for malignant tumors of epithelial tissues?
Carcinoma
What is the characteristic of the shape of benign tumors?
Well-circumscribed
What is the characteristic of the size of benign tumors?
Usually small but can be large
What is the characteristic of the capsule of benign tumors?
Usually present but not always
What is the term for malignant tumors of mesenchymal tissues?
Sarcoma
What is a characteristic of benign tumors in terms of their cut surface?
They are usually solid but may be cystic
What is a rare occurrence in benign tumors?
Ulceration
What is a characteristic of benign tumors in terms of their microscopic picture?
The cells are usually small and of equal size and similar shape
What is a characteristic of malignant tumors in terms of their size?
They usually reach a large size in a short time
What is a characteristic of malignant tumors in terms of their shape on body surfaces?
They are usually polypoid, ulcerative, or infiltrating
Why do malignant tumors often lack a capsule?
Due to the rapid rate of growth, the tumor has no time to form a capsule
What is a characteristic of malignant tumors in terms of their microscopic picture?
They show a loss of differentiation
What is a characteristic of malignant tumors in terms of their margins?
They are blurred
What characterizes pleomorphism in cellular morphology?
Cells are larger than normal and show variation in size and shape
What is the nucleo-cytoplasmic (N/C) ratio in malignant cells typically like?
Increased
What abnormality is frequently observed in the nuclei of malignant cells?
Hyperchromatic, enlarged and darkly stained, variable in size, shape and position
Which phenomenon results in a 'tumor giant cell'?
Repeating nuclear division without cytoplasm division
What is a significant characteristic of mitotic figures in malignant tumors?
Frequent and abnormal
What defines the loss of polarity in malignant tumors?
Loss of the normal relation between each cell and the neighboring ones and surrounding tissues
Learn about neoplasia, its definition, classification, and characteristics of benign and malignant tumors. Understand the differences between the two and their impact on the body.
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