Neoplasia Lecture 39

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Questions and Answers

What is the primary characteristic of neoplasia?

  • Abnormal proliferation of cells that is useful to the body
  • Abnormal proliferation of cells that is spontaneous and irreversible (correct)
  • Abnormal proliferation of cells that is stimulated by external factors
  • Abnormal proliferation of cells that is controlled by the body

What is the main difference between benign and malignant tumors?

  • Benign tumors are not capsulated and malignant tumors are capsulated
  • Benign tumors are well-circumscribed and malignant tumors are infiltrative (correct)
  • Benign tumors are large and malignant tumors are small
  • Benign tumors are slow-growing and malignant tumors are fast-growing

What is the suffix commonly added to benign tumors?

  • -algia
  • -itis
  • -osis
  • -oma (correct)

What is the term for malignant tumors of epithelial tissues?

<p>Carcinoma (C)</p> Signup and view all the answers

What is the characteristic of the shape of benign tumors?

<p>Well-circumscribed (A)</p> Signup and view all the answers

What is the characteristic of the size of benign tumors?

<p>Usually small but can be large (C)</p> Signup and view all the answers

What is the characteristic of the capsule of benign tumors?

<p>Usually present but not always (D)</p> Signup and view all the answers

What is the term for malignant tumors of mesenchymal tissues?

<p>Sarcoma (D)</p> Signup and view all the answers

What is a characteristic of benign tumors in terms of their cut surface?

<p>They are usually solid but may be cystic (C)</p> Signup and view all the answers

What is a rare occurrence in benign tumors?

<p>Ulceration (A)</p> Signup and view all the answers

What is a characteristic of benign tumors in terms of their microscopic picture?

<p>The cells are usually small and of equal size and similar shape (B)</p> Signup and view all the answers

What is a characteristic of malignant tumors in terms of their size?

<p>They usually reach a large size in a short time (A)</p> Signup and view all the answers

What is a characteristic of malignant tumors in terms of their shape on body surfaces?

<p>They are usually polypoid, ulcerative, or infiltrating (A)</p> Signup and view all the answers

Why do malignant tumors often lack a capsule?

<p>Due to the rapid rate of growth, the tumor has no time to form a capsule (B)</p> Signup and view all the answers

What is a characteristic of malignant tumors in terms of their microscopic picture?

<p>They show a loss of differentiation (B)</p> Signup and view all the answers

What is a characteristic of malignant tumors in terms of their margins?

<p>They are blurred (D)</p> Signup and view all the answers

What characterizes pleomorphism in cellular morphology?

<p>Cells are larger than normal and show variation in size and shape (C)</p> Signup and view all the answers

What is the nucleo-cytoplasmic (N/C) ratio in malignant cells typically like?

<p>Increased (C)</p> Signup and view all the answers

What abnormality is frequently observed in the nuclei of malignant cells?

<p>Hyperchromatic, enlarged and darkly stained, variable in size, shape and position (C)</p> Signup and view all the answers

Which phenomenon results in a 'tumor giant cell'?

<p>Repeating nuclear division without cytoplasm division (D)</p> Signup and view all the answers

What is a significant characteristic of mitotic figures in malignant tumors?

<p>Frequent and abnormal (A)</p> Signup and view all the answers

What defines the loss of polarity in malignant tumors?

<p>Loss of the normal relation between each cell and the neighboring ones and surrounding tissues (D)</p> Signup and view all the answers

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