77% of all cancers are diagnosed in patients over age ___. __% of cancers are hereditary. Who has a greater risk of developing it (men or women?) ___% deaths is cancer related making it the 2nd leading cause of death
55, 5-10%, men, 25%
What are the top 6 most common cancers
What 5 main types of cancer affect a woman’s reproductive organs?
Cervical (preventable HPV vaccine) Ovarian (causes most deaths) Uterine (mostly endometrium) vaginal vulvar (on the labia)
Common childhood cancers (5)
carcinoma definition
Any cancerous tumor that starts with the cells that cover the inner and outer body surfaces (epithelium), invade surrounding tissue and spread to far regions of the body, other tissue types can also be cancerous (sarcoma, lymphoma, blastoma, etc)
Direct spread vs metastasis
Direct spread is invasion/infiltration into surrounding tissue, metastasis is vascular or lymphatic spread
How do cancer cells kill?
Oncogenes
Altered forms of genes known as proto oncogenes that can promote tumor formation or growth
Proto-oncogenes
Responsible for promoting cell growth
Tumor suppressor genes
Control process of cell growth when functioning correctly promoting apoptosis that when not functioning can lead to tumor formation and growth
DNA repair genes
Correct naturally occurring errors in DNA and if mutated fail to correct mistakes potentially leading to tumor suppressor gene or proto-oncogene alteration and tumor growth
Oncovirus
Family of viruses linked to certain cancers in animals and humans (HPV, epstein barr, hep C)
Warning signs for cancer (4)
Cancer grading: differentiation grade
Grade 1 - well differentiated
2 - moderatly differentiated
3 - poorly differentiated
4 - undifferentiated’
TNM staging of cancer
T- tumor size (T1 in situ T5 extension beyond adjacent organs)
N- nodes (N0 none, N1 ipsalateral or regional involvement, N2 - more extensive, N3 contralateral or distant nodal metastasis)
M- metastasis (M0 - neg, M1 - pos)
Radiation therapy definition
Cancer treatment that uses high doses of radiation to kill cancer cells and stop them from spreading, up to 1/2 of cancer patients receive it at some point, can be used alone or alongside surgery or chemo
Photons energy rating scale
Radiation therapy mech of action
Damages DNA directly or creates free radicals in cell that damage DNA of both cancer cells resulting in their death as well as host cells
Preoperative radiation is known as ___, during surgery is ____, and post op therapy is ____
neoadjuvant, intraoperative, adjuvant
Measure of radiation energy absorbed by 1kg of human tissue is a…
…gray (Gy)
Brachytherapy
Internal radiation where radioactive material is placed in the body near cancer cells typically in seeds
Systemic radiation
A radioactive substance is given by mouth or vein and travels into the blood to tissues thru the body
3D conformational radiation therapy (3D-CRT)
Most common type of external radiation therapy, computer software allows delivery at precisely shaped areas
Intensity modulated radiation therapy (IMRT)
A type of external radiation therapy that allows for different areas of a tumor or space nearby to receive varying doses of radiation allowing for less side effects than 3D-CRT