FINAL EXAM - Cancer Flashcards
cancer
group of diseases characterized by uncontrolled growth and spread of abnormal cells
The four categories of Cancer
- carcinomas
- leukemias
- sarcomas
- lymphomas
Carcinomas begin in the
the body’s organs (including skin)
leukemias begin in
blood-forming tissues (e.g. bone marrow)
sarcomas begin in
connective tissue (e.g. bone, fat, muscle, or cartilage)
lymphomas begin in the
lymphatic system
The most common forms of cancer (5)
- breast
- lung
- prostate
- bronchus
- colorectal
in most cancers, except for leukemia, the cancerous cells form a
tumor
To diagnose cancer, physicians may use (4)
- CT scans
- xrays
- mammograms
- lab tests
Etiology of Cancer
the uncontrolled growth of mutated cells which can be caused by internal/external factors
Internal factors that cause cancer (4) can not be controlled!
- genetics (inherited cell mutations)
- immunological conditions
- cell mutations produced bia metabolism
- hormones
External factors that cause cancer (7)
80% of cancer cases in US
- tobacco use
- exposure to radiation (including sun exposure)
- poor nutrition
- physical inactivity
- certain infectious agents
- certain medical treatments
- exposure to carcinogens via pollution, employment ……
Cancers caused by external factors can be
prevented
What is the TNM system? Which cancers do not use this system(3)?
common method of staging cancer; T-extent of the primary tumor, N - extent of spread to the lymph nodes, M - presence of distant metastasis. Not used for : Nervous system cancers lymphomas leukemias
Extent of the primary tumor classification (4)
- TX
- T0
- Tis
- T1, T2, T3, T4
TX (tumor)
primary tumor cannot be evaluated
T0
no evidence of primary tumor
Tis
carcinoma in situ - tumor is still confined to the site it started (early cancer)
T1, T2, T3, T4 refers to
size and or extent of the primary tumor
Extent of spread to lymph nodes classification (3)
- NX
- N0
- N1, N2, N3
NX
regional lymph nodes cannot be evaluated
N0
no regional lymph node involvement
N1, N2, N3
involvement of regional lymph nodes (number of lymph nodes and/or extent of spread)
Presence of distant metastasis classification (3)
- MX
- M0
- M1
MX
distant metastasis cannot be evaluated
M0
no distant metastasis
M1
distant metastasis is present
Stage 0
cancer in situ
Stage 1, Stage II, Stage III
Higher number indicates more extensive disease; larger tumor size and/or spread of the cancer beyond the organ/site in which it first developed to nearby lymph nodes and /or organs adjacent to the location of the primary tumor
Stage IV
the cancer has spread to another organ(s)
Regular screenings are recommended because some forms of cancer do not have
early symptoms
General symptoms of cancer (5)
- unexplained weight loss of 10lbs or more
- fever
- fatigue
- pain
- skin changes (color change, itching, excessive hair growth)