Ch. 7 - Neoplasia Flashcards
What is neoplasia?
New growth.
What is a tumor?
Formation of masses.
What is Cancer?
tissue invasion, appearance like crawling crab.
What is oncology?
The branch of science dealing with neoplasia.
What is a carcinoma in situ?
“in it’s place” - usually before basement membrane penetration
Will a tumor always be a neoplasia?
yes.
Is a neoplasia always a tumor?
No.
What is hyperplasia?
Increase in number of cells.
What is metaplasia?
1 adult cell type is replaced by another.
What is dysplasia?
abnormal growth with loss of cellular orientation, shape. Commonly preneoplastic
What is anaplasia?
An IRREVERSIBLE abnormal cell lacking differentiation.
What is irreversible neoplasia?
a clonal proliferation of cells that is uncontrolled and excessive.
What is desmoplasia?
IRREVERSIBLE fibrous tissue formation in response to neoplasm.
What are the 2 clinical classifications of tumors?
- Benign 2. Malignant
Benign vs malignant - growth?
Benign = slow, expansive Malignant = Fast, invasive
Does a tumor have to have metastases to be malignant?
NO
Which type of tumor has metastases (transfer to other parts of the body)?
Malignant.
What is the external surface of benign and malignant tumors?
Benign- smooth, malignant- irregular.
What type of tumor will have a capsule?
Benign.
What type of tumor will show necrosis?
Malignant.
What type of tumor will have hemorrhage?
Malignant.
Tumors can get up to how big before they need a new blood supply?
10mm.
How will large tumors get new blood supply?
They release chemotaxic factors that induce angiogenesis.
What will the benign and malignant tumors look like microscopically?
Benign- look like normal tissue of origin. Malignant- does not resemble normal tissue of origin.