Cancer Flashcards
True or False: Cancer is more prevalent in men than women?
True
true or False: Colon cancer is the leading cause of cancer in both men and women.
False: Lung Cancer
True or false: Cancer is the leading cause of death in America
False: Heart Disease. Cancer is #2. However in people over the age of 85, cancer is #1
Protooncogenes
Normal cell genes that are important regulators of normal cell processes. They promote growth. Protooncogenes are the genetic lock that keeps the cell in its mature functioning state. This is unclocked by exposure to carcinogens or oncogenic viruses.
Tumor Suppressor genes
Suppress growth; regulate cell growth. Mutations that alter TSG can make them inactive, resulting in a loss of their suppressive action. (BRCA1 and BRCA2)
Oncogenes
Mutations that alter the expression of protooncogenes. Oncogenes are tumor inducing genes.
BRCA1 and BRCA2
Tumor suppressor genes that increase a persons risk for breast and ovarian cancer
APC gene
Tumor suppressor gene that increase risk for familial adematous polyposis, which is a precursor for colorectal, esophageal, liver, lung, and ovarian cancer.
Carcinoma
Cancer composed of epithelial cells. Cover or align tissues of the body. Arises from glandular epithelium. Ex: Skin and glands. Mucous membranes of the respiratory, GI and GU tract.
Sarcoma
Cancer of supporting tissue, cartilage, bone, muscle, fat.
Tumor angiogenesis
The process of the formation of blood vessels within the tumor itself.
Hematogenous metastisis
involves several steps begining with primary tumor cells penetrating blood vessels. These tumor cells then enter the circulation, travel through the body, and adhere to and penetrate small blood vessels of distant organs. Most tumor cells do not survive this process and are destroyed.
Main sites of metastisis
Brain and CSF, Lung, Liver, Adrenals, Bone
Solid tumors
Brain, head and neck, lung, esophagus, liver, pancrease, gallbladder, small intestine, colon, rectal, uterus, cervix, ovaries, breast, skin, bone.
Hematologic cancers
Lymph, leukemia (wbc), myeloma
Malignant cells
- Grow uncontrollably
- Do not exibit contact inhibition
- Poorly differentiated
- Do not stay with their cell types
- Have own blood supply
Stages of metastatic process
- Tumor growth
- Angiogenesis
- Entry into capillaries and lymph
- circulation to other organs
Factors related to carcinogenesis
- Genetic predisposition
- Chronic inflammation
- Environmental toxin exposure (radiation, tobacco, diet)
- Diet
- Regional geography
High fat and Low fiber diet equals
Increase cancer risk
Mediterranean Diet increases or decreases cancer risk?
Decreases
Lymphoma
Leukemia, hemopoetic
Cancer of lymph nodes or lymph tissue
Grade
Degree of malignancy by cells
Stage
Degree of spread
Blood studies for cancer
CBC: RBC and WBC
Tumor Markers: eg. PSA (Prostate surface antigen)
Cytology Exam
Brushing; PAP, Bronchial
Sent to lab
Types of Biopsies
Needle aspirate: Fine or Core needle Surgical excursion of tissue sample Frozen section vs. traditional pathology Identifies cell type and grade Sent to lab
Grade 1
Differs slightly from normal cells, well differeniated
Grade 2
More abnormal; moderately differentiated
Grade 3
Very abnormal, poorly differentiated
Grade 4
Undifferentiated, difficult to determine cell origin. Cells are immature and primitive.
Encapsulated Neoplasms
Usually benign; Rarely Malignant
Differentiated Neoplasms
Normally benign; Poorly malignant
Metastasis Neoplasms
Not benign; Capable of being malignant
Recurrence of Neoplasms
Rarely benign; Possibly malignant
Vascularity of Neoplasms
Benign: Slightly; Malignant: Moderate to marked
Mode of growth of Neoplasms
Benign: Expansive
Malignant: Infiltrative and expansive
Cell characteristics of Neoplasms
Benign: Fairly Normal, similar to parent cells
Malignant: cells abnormal, become more unlike parent cells
Stage 0
Cancer in situ or a neoplasm whose cells are localized and show no tendency to invade or metastasize to other tissues.
Stage 1
Tumor limited to the tissue of origin; localized tumor growth
Stage 2
limited local spread
Stage 3
Extensive local and regional spread
Stage 4
metastasis
TNM Classification system
T: Tumor size and invasiveness
N: Presence of absense of regional spread to lymph nodes
M: Metastasis to other tissues
TNM Only used with sold tumors.
Surgical staging
refers to the extent of the disease as determined by surgical ecision, exploration, and/or lympth node sampling.
Seven warning signs of cancer
CAUTION Change in bowel or bladder habits A sore that does not heal Unusual bleeding or discharge from any body orifice Thickening or a lump in the breast or anywhere else Indigestion or difficulty in swallowing Obvious change in wart or mole Nagging cough or hoarseness
Prevention and early detection of cancer
Limit alcohol abuse Get regular physical activity Maintain a normal body weight Obtain regular colorectal screenings Avoid cigarette smoking and other tobacco use Get regular mammography and Pap test Use sunscreen SPF 15 or higher Practice health dietary habits. Decrease Fat and increase fruit and veggie consumption
Fine needle aspiration biopsy
accomplished witha small gauge needle that provides cells from the mass for cytologic exam
Large core biopsy
Cutting needles deliver actual peice of tissue that can be analyzed with the andvantage of preserving the histologic architecture of the tissue specimen