oncology Flashcards
(42 cards)
what are the stages of a tumor/cancer
stage 0-4
what is stage 0 of a tumor
carcinoma in situ that is premalignant or preinvasive
what is stage 1 cancer
early, localized cancer
what is stage 2 cancer
increased risk of spread due to tumor size
what is stage 3 cancer
local cancer has spread but may not have been disseminated to distant regions
what is stage 4 cancer
cancer has spread and disseminated to distant sites
what stage affects lymphnodes? what does that mean
stage 3
spread a lot easier
most commonly diagnosed cancers
lung
breast
colorectal
what is the most prevalent cancer in the world
breast cancer
which cancer is the most deadly
lung cancer
when did cancer diagnoses peak? what happened then?
1990 - significantly decreased each year
associated with decrease in smoking
what cancers in men are most common
prostate
lung / bronchus
colon/rectum
what are the most common cancers diagnosed in women
breast
lung/bronchus
colorectal
which cancers show a more familial orign
breast / colon / ovarian
what are the modifiable risk factors of cancer development
tobacco
diet/nutrition
alcohol
hormonal exposure
geographic location
stress
what are the common anatomical means of spreading
invasion
metastasis
what is invasion
as a tumor increases in size, it begins to encroach on the surrounding tissue and invade them
what is metastasis
malignant tumors have the ability
cancer cells break away from the tumor and get trapped in the capillaries of the surrounding tissue/organ
can then travel through the body
which system is metastasis more likely to occur in
venous > arterial
as well as lymph
not able to break through thicker arterial walls
what are the most common sites of metastasis
lymph node
liver
lung
bone
brain
when does metastasis typically occur
3-5 years after initial diagnosis and treatment of malignancy
what anatomically makes lung cancer more likely
they are the first organ to filter malignant cells
more likely for them to get implanted in the lungs
what is often the first symptom of lung cancer
dry persistent cough
pleural pain
SOB
why is the liver a common site of metastasis
filters blood coming from GI tract
easy site for tumors of the stomach, colorectum and pancreass