understanding cancer
DESCRIPTION
This powerpoint describes some basic ideas about cancerTRANSCRIPT
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Understanding Cancer
Heri Fadjari
Hematology – Medical Oncology DivisionDept. of Internal Medicine
Hasan Sadikin General HospitalBandung
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What Is Cancer?
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Different Kinds of Cancer
Lung
Breast (women)
Colon
BladderProstate (men)
Some common sarcomas:Fat
Bone
Muscle
Lymphomas:Lymph nodes
Leukemias:Bloodstream
Some common carcinomas:
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Naming Cancers
Prefix Meaning
adeno- gland
chondro- cartilage
erythro- red blood cell
hemangio- blood vessels
hepato- liver
lipo- fat
lympho- lymphocyte
melano- pigment cell
myelo- bone marrow
myo- muscle
osteo- bone
Cancer Prefixes Point to Location
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Loss of Normal Growth Control
Cancer cell division
Fourth orlater mutation
Third mutation
Second mutation
First mutation
Uncontrolled growth
Cell Suicide or Apoptosis
Cell damage—no repair
Normal cell division
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Example of Normal Growth
Cell migration
Dermis
Dividing cells in basal layer
Dead cells shed from
outer surface
Epidermis
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The Beginning of Cancerous Growth
Underlying tissue
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Tumors (Neoplasms)
Underlying tissue
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Invasion and Metastasis
3Cancer cells reinvade and grow at new location
1Cancer cells invade surrounding tissues and blood vessels
2Cancer cells are transported by the circulatory system to distant sites
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Malignant versus Benign Tumors
Malignant (cancer) cells invade neighboring tissues, enter blood vessels, and metastasize to different sites
Time
Benign (not cancer) tumor cells grow only locally and cannot spread by invasion or metastasis
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Why Cancer Is Potentially Dangerous
Melanoma cells travel through bloodstream
Melanoma(initial tumor)
Brain
Liver
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Cancer Detection and Diagnosis
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Early Cancer May Not Have Any Symptoms
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Cervical Cancer Screening
Abnormal Pap smear
Normal Pap smear
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Breast Cancer Screening
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Prostate and Ovarian Cancer Screening
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Colon Cancer Screening
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Biopsy
Patient’stissue sample or
blood sample Genomic profile
Proteomic profile
Pathology
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Microscopic Appearance of Cancer Cells
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Hyperplasia
HyperplasiaNormal
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Dysplasia
Hyperplasia Mild dysplasiaNormal
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Carcinoma in Situ
Milddysplasia
Carcinoma in situ (severe dysplasia) Cancer
(invasive)
Normal Hyperplasia
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Tumor Grading
General Relationship Between Tumor Grade and Prognosis
PatientSurvival
Rate
Years
High grade
Low grade
100%
1 2 3 4 5
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Tumor Staging
Five-Year Survival Rates forPatients with Melanoma (by stage)
Stage at Time of Initial Diagnosis
100%
50%
I II III
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What Causes Cancer?Some viruses or bacteria
HeredityDiet
Hormones
RadiationSome chemicals
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Population-Based Studies
CANADA:Leukemia
Regions of Highest Incidence
BRAZIL:Cervicalcancer
U.S.:Coloncancer
AUSTRALIA:Skincancer
CHINA:Livercancer
U.K.:Lungcancer
JAPAN:Stomachcancer
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Heredity? Behaviors? Other Factors?
100
50
50
Stomach Cancer(Number of new cases
per 100,000 people)
U.S.Japan Japanese familiesin U.S.
100
70
7
0
Colon Cancer(Number of new cases
per 100,000 people)
U.S.Japan Japanese familiesin U.S.
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Tobacco Use and CancerSome Cancer-Causing Chemicals in Tobacco Smoke
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Low-Strength Radiation
Annual Sunshine(UV radiation)
SkinCancer
Incidence
Most
Dallas
Pittsburgh
High
Detroit
LowLeast
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High-Strength Radiation
Most
High
LowLeast
Leukemia Incidence
X-ray Dose(atomic radiation)
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Lag Time
4000
3000
2000
1000
20-Year Lag Time Between Smoking and Lung Cancer
CigarettesSmoked
per Personper Year
Lung Cancer Deaths (per 100,000 people)
Year
Lung cancer (men)
Cigarette consumption (men)
1900 1920 1940 1960 1980
150
100
50
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Viruses
Virus inserts and changes genes forcell growth
Cancer-linked virus
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Examples of Human Cancer Viruses
Some Viruses Associated with Human Cancers
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AIDS and Kaposi’s Sarcoma
Kaposi’ssarcoma
Withoutdisease
Depressedimmunesystem
HIV infection
KSHV infection
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Bacteria and Stomach Cancer
H. pyloriPatient’s tissue sample
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Heredity and Cancer
Inherited factor(s)
All Breast Cancer Patients
Other factor(s)
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Heredity Can Affect Many Types of Cancer
Inherited Conditions That Increase Risk for Cancer
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Genetic Testing
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Cancer Risk and Aging
400
300
200
100
Cancer Risk and Aging
Number of Cancer Cases
(per 100,000 people)
Age of Person (in years)
Colon
Breast
0 20 40 60 80
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Cancer Tends toCorrupt Surrounding Environment
Growth factors = proliferation
Blood vessel
Proteases
Cytokines
Matrix
Fibroblasts, adipocytes
Invasive
Cytokines, proteases = migration & invasion
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Cancer Prevention
Cancer viruses or bacteria
Carcinogenic radiation
Carcinogenic chemicals
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Avoid Tobacco
15x
10x
5x
Non-smokerCigarettes Smoked per Day
Lung Cancer Risk Increases with Cigarette Consumption
Lung Cancer
Risk
0 15 30
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Protect Yourself From Excessive Sunlight
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Limit Alcohol and Tobacco
40x
30x
20x
10x
Alcoholic Drinks Consumed per Day
Packs of Cigarettes Consumed per Day
Combination of Alcohol and Cigarettes Increases Risk for Cancer of the Esophagus
Risk Increase
AND
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Diet: Limit Fats and Calories
0
Number of Cases (per 100,000
people)
Grams (per person per day)
Correlation Between Meat Consumption and Colon Cancer Rates in Different Countries
40
30
20
10
30020010080
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Diet: Consume Fruits and Vegetables
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Avoid Cancer Viruses
Noninfected women
HPV Infection Increases Risk for Cervical Cancer
Cervical Cancer
Risk
Low
High
Women infected with HPV
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Industrial Pollution
1930
Incidence of Most Cancers
Year199019701950
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Is There a Cancer "Epidemic"?
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We would like to hear a questions from you . . .
.
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Breast implant
Breast augmentation
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A good result, but note the excessive gap between breasts,
common in transsexual women.
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Saline filled implants
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Wrinkling 21% 20%Reoperation 13% 10%Loss of Nipple Sensation 10% 8%Capsular Contracture 9% 7%Implant Remova l8% 6%Asymmetry 7% 5%Intense Nipple Sensation 5% 4%Breast Pain 5% 4%Leakage/Deflation 3% 2%Implant Palpability 2% 2%Infection 2% 1%Breast Sagging 2% 1%Scarring Complications 2% 2%
Augmentation Complications
3-Year Risk RateBy PatientN=1264
By ImplantN=2528
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Wrinkling Capsular contracture
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