Week 6 Flashcards
What are the non-modifiable risk factors of cancer?
- Age
- Genetics
- Epigenetics
- Immunosuppression (relative)
- Radiation (relative)
- Sunlight (relative)
Relative meaning that it depends on the person’s lifestyle behaviors
What are the modifiable risk factors of cancer?
- Alcohol
- Cancer-Causing Substances
- Chronic Inflammation
- Diet
- Hormones
- Immunosuppression
- Infectious Agents
- Obesity
- Radiation
- Sunlight
- Tobacco
A normal cell proliferates and differentiates. What does this include?
Proliferation
• Increase in cell number
• Regulated by growth factors
• Cell goes through cell cycle, which is controlled by cell cycle inhibitors, to prevent excessive growth
Differentiation
• Cells becomes “specialized” to carry out particular functions. Tissue is formed that has specific structure and function
What are some of the characteristics of a normal cell?
• Limited number of cell divisions
• Contact inhibition: function turning off upon contact with something
• Mutations
- Mutated DNA repaired
- Defective cell may be destroyed by immune system
• Apoptosis
What is cancer normally related to?
A genetic/epigenetic alteration. A disease of mutation, that is either within the structure or the function of the cell
What type patients typically have a structure mutation?
Childhood and early adult
What type patients typically have an epigenetic/function mutation?
In adults
True or False
Only 10% of cancer cases are genetically linked
True, Only 10% of cancer cases are genetically linked
What is a tumor?
An abnormal mass of tissue that results when cells divide more than they should or do not die when they should. Tumors may be benign (not cancer), or malignant (cancer). Also called neoplasm
What are the major types of tumors?
- Benign: not cancer
- In situ: contained
- Malignant: cancer
- Unknown origin
What is carcinogenesis?
The process by which normal cells are transformed into cancer cells
What are the cellular or tumor characteristics of cancer?
- Abnormality(can also be characteristics of a benign tumor)
- Uncontrollability(can also be characteristics of a benign tumor)
- Invasiveness
What are the drivers of carcinogenesis?
• Proto-oncogene, a gene involved in normal cell growth. Mutations may cause it to become an oncogene, which
can cause the growth of cancer cells
• Oncogene which is a mutated proto-oncogene
• Tumor suppressor gene, a negative regulator of growth factor stimulation which controls cell growth and division. Suppression or blockage leads to the development of cancer. Normally considered an anti-oncogene, when it has no abnormalities
What is the proposed function of tumor suppressor gene: BRCA1, and if mutated, what does it lead to?
- Proposed function: DNA repair
* Disease if mutated: Breast cancer
What is the proposed function of tumor suppressor gene: p53, and if mutated, what does it lead to?
• Proposed function: Transcription/cell cycle
regulation
• Disease if mutated: Sarcoma, carcinoma, leukemia
What is the proposed function of tumor suppressor gene: Rb, and if mutated, what does it lead to?
- Proposed function: Nuclear transcription factor
* Disease if mutated: Retinoblastoma
What is the proposed function of tumor suppressor gene: MEN1, and if mutated, what does it lead to?
- Proposed function: Intrastrand DNA crosslink repair
* Disease if mutated: Parathyroid and pituitary adenomas, islet cell tumors
When is a person considered a cancer survivor?
At the time of diagnosis
True or False
Even though black women have a lower incidence rate for breast cancer than white women, black women have a 2-3x higher mortality rate(they die faster)
True, Even though black women have a lower incidence rate for breast cancer than white women, black women have a 2-3x higher mortality rate(they die faster)
What population is kidney cancer mostly seen?
American indians / alaska natives
What population is liver cancer mostly seen?
American indians/ alaska natives, asians, and pacific islanders
What population is prostate cancer mostly seen?
African american men
What population is cervical cancer mostly seen?
Women in rural areas
What population is multiple myeloma mostly seen?
African americans
What are the risk factors associated with cancer disparities?
- Genetic and biological factors
- Health care access
- Socioeconomic factors
- Chemical and physical exposures
- Diet
- Physical inactivity
True or False
The prevalence rate of cancer is the US is going down
FALSE, The prevalence rate of cancer is the US is going UP. This is a good thing, because mortality rates are decreasing
What does an incidence rate refer to?
Frequency of occurrence of new cases of disease or injury in a population over a specified period of time
• Denominator is usually:
- Summed person-years of observation
- Average population(more commonly used)
What does a mortality rate refer to?
Frequency of occurrence of death in a defined population during a specified interval
• Variety of measures: Subsets
and Mid-interval
• Denominator is usually avg population
What are the major types of cancer seen in children 0-14 years?
- Acute lymphocytic leukemia (ALL)
- Brain and other central nervous system (CNS) tumors
- Neuroblastoma
What is the average age of cancer diagnosis in children?
6
What is the population often affected by cancer in children?
White and Hispanic children have higher incidence rates than other racial and ethnic groups
What is the prevalence of cancer diagnosis in children?
1 in 330 will be diagnosed by age 20
What population is at a high risk for cancer?
- Heavy alcohol use
- Older adults
- Frequent exposure to cancer causing substances
- Obese persons
- Frequent unprotected exposure to sunlight
- High inflammatory dietary habits
- Cancer survivors
- Treatments including hormones or radiation
- Persons with immunosuppression
- Exposure to tobacco or smoke
Why do cancer health disparities exist?
- Access to and use of health care
- Genetics
- Physical and mental health
- Treatments received
- Social and economic status
- Cultural beliefs
- Exposure to environmental cancer risk factors
- Clinical trial participation
- Health literacy
True or False
Everyone has a cancer risk
True, everyone has a cancer risk
What is the best approach to use when talking to a patient about cancer?
Use a client-oriented approach (tailored approach)
- Individual or lifestyle assessment
- Motivational interviewing
• Identify any targeted evidence or awareness campaign
materials (message targeting)
- Unique characteristics
- Outcomes of interest
• Routine reminders have been shown to increase adherence to current screening and lifestyle modification recommendations
What are the general lifestyle recommendations for lung cancer?
Reduce/minimize:
• Single greatest avoidable risk factor (World Health Organization)
• Smoking or oral tobacco cessation or reduce secondhand smoke exposure
What are the general drinking recommendations for patients to reduce their risk for cancer?
- One drink per day for women (4-8 oz)
* Two drinks per day for men (4-8 oz)
What are the types of diets that is recommended to reduce the risk of all cancers?
- Select a diet that reduces inflammation
- Reduce your diabetes risk
- Have a lifestyle that encourages physical activity
What can be done to help reduce the risk of breast cancer?
Have children or minimize your use of hormone therapy
In order to reduce the risk of cancer, people should maintain a healthy weight. Why is this?
Obesity is associated with inflammation, increased estrogen levels, increased insulin and insulin-like growth factors, increased adipokines, and changes in cell growth
regulators
What are the things that we want to do to reduce the risk of getting virus related cancers?
Vaccinations (HPV, Hep B, Hep C)
What are the things that we want to do to reduce the risk of getting skin cancers?
Protect your skin with sunscreen products, clothing, and hats/visors
• Minimize your time in the sun between 10am-4pm
• Wear dark fabrics
• Check your skin regularly
At what age does any moles developed lead to skin cancer?
After the age of 25, 70% of the time
What are the current screening recommendations for skin cancer?
Current evidence is insufficient to assess the balance of benefits and harms of visual skin examination by a clinician to screen for skin cancer in adults
What are the current screening recommendations for lung cancer?
Annual screening for lung cancer with low-dose computed tomography
(LDCT) in adults aged 55 to 80 years who have a 30 pack-year smoking history and currently smoke or have quit within the past 15 years
What are the current screening recommendations for breast cancer?
Recommends biennial screening mammography for women aged 50 to 74 years
The acronym CAUUTION-P is used to determine when action should be taken for a patient that might indicate when they have cancer. What does it mean?
- Change in bowel and bladder habits for up to 3 days
- A sore that does not heal for up to 3 days
- Unusual bleeding or discharge in stool for up to 3 days
- Unusual bleeding in between periods for up to 3 days
- Thickening or lump in the breast, testicles, or elsewhere for up to 3 days
- Indigestion or difficulty swallowing for up to 3 days
- Obvious change in the size fo a mole or mouth sore for up to 3 days
- Nagging cough or hoarseness for up to 3 days
- Pain
What is the action to be taken when a patient complains of a Change in bowel and bladder habits for up to 3 days?
Ultrasonography and endoscopy
What is the action to be taken when a patient complains of a A sore that does not heal for up to 3 days?
Biopsy and oral and skin exam
What is the action to be taken when a patient complains of Unusual bleeding or discharge in stool for up to 3 days?
Rectal exam and colonoscopy
What is the action to be taken when a patient complains of Unusual bleeding in between periods for up to 3 days?
Gynecology exam for cervix and biopsy
What is the action to be taken when a patient complains of Thickening or lump in the breast, testicles, or elsewhere for up to 3 days?
Ultrasonography and FNAC if abnormal
What is the action to be taken when a patient complains of Indigestion or difficulty swallowing for up to 3 days?
Endoscopy
What is the action to be taken when a patient complains of an Obvious change in the size fo a mole or mouth sore for up to 3 days?
Biopsy
What is the action to be taken when a patient complains of a Nagging cough or hoarseness for up to 3 days?
ENT examination and chest x ray
What are the pain complaints that a patient might have that will require they get a work up to rule out cancer?
• Different times
- Acute, chronic/persistent, breakthrough
• Different types
- Nerve, bone, soft tissue, phantom, or referred
• Pain that does not respond to treatment or change in position
• Nocturnal pain
• Headache in the am (first thing in the morning, consistently) but improves throughout the day; may worsen with physical activity or positional changes
What are the theories behind the reason of nocturnal pain in cancer patients?
- Relax muscles and tumor invasion becomes more noticeable
- Perception of pain influenced by drop in body temperature, increase in carbon dioxide, or decrease in mental distraction
What are the characteristics of a benign tumor?
Typically slow growing • Localized • Not invasive (unrelated tissues/organs) • Not cancerous • Recurrence unlikely • Encapsulated • End with "oma", regardless of their cell type
What are the characteristics of a malignant tumor?
• Rapid or slow growth • Invasive • Encapsulated • Cancerous • Possible recurrence • End in “oma” - more description regarding pathology • Organ or cell of origin
____ malignant cancer is slow growing
Prostate malignant cancer is slow growing
What is the pathology of a carcinoma?
Skin or in tissues that line or cover internal organs, various subtypes.
What is the pathology of a sarcoma?
Bone, cartilage, fat, muscle, blood vessels, or other connective or supportive tissue
What is the pathology of leukemia?
Blood-forming tissue
What is the pathology of lymphoma and myeloma?
Cells of the immune system
What is the pathology of Central nervous system cancers?
Brain and spinal cord tissue
What is the name of a benign tumor and malignant tumor of an adult fibrous tissue?
- Benign: fibroma
* Malignant: Fibrosarcoma
What is the name of a benign tumor and malignant tumor of an embryonic(myxmatous) fibrous tissue?
- Benign: myxoma
* Malignant: myxosarcoma
What is the name of a benign tumor and malignant tumor of fat?
- Benign: lipoma
* Malignant: liposarcoma
What is the name of a benign tumor and malignant tumor of cartilage?
- Benign: chondroma
* Malignant: chondrosarcoma
What is the name of a benign tumor and malignant tumor of the bone?
- Benign: osteoma
* Malignant: osteosarcoma
What is the name of a benign tumor and malignant tumor of the notochord?
- Benign: —
* Malignant: chordoma
What is the name of a benign tumor and malignant tumor of the connective tissue, probably fibrous?
- Benign: fibrous histiocytoma
* Malignant: malignant fibrous histiocytoma
What are the characteristics of a malignant tumor cell?
• No normal cell organization or differentiation
• Lack control of cell division
• No contact inhibition
• Do not adhere to each other, which allows them to often break loose from mass and invade other tissues and may spread to distant sites
• Do not undergo apoptosis
• Abnormal cell membranes
• Altered surface antigens
• Compress blood vessels which leads to deprivation of normal cells of nutrients
• Necrosis and inflammation around tumor
- Loss of normal cells
- Reduction in organ integrity and function
Malignant tumors secrete cytokines and chemokines that encourage the development of new capillaries. What are the characteristics of this?
• Development of new capillaries
– Angiogenic factor secretion
- Including Vascular, Endothelial, Growth Factor (VEGF)
– Secretion of matrix metalloproteinase (MMP), which
breaks down collagen in ECM through collagenase
What are the evasion strategies of a malignant tumor?
Immune escape • Loss of immunogenicity - Lack of loading into class I MHC and lack of presentation to T cells (tolerance) • Antigenic modulation - Loss of surface antigens, antibodies cannot bind • Induction of immune suppression • Prevention of NK and T cell activation - Downregulation of MHC, NK cell-activating receptors, and T cell activation
What is the preferred method to get the definitive diagnosis of cancer?
A biopsy
What is a primary cancer?
The source of the cancer. The most common sites being, the skin, lung, female breasts, colorectal, corpus uteri, prostate
What is a secondary cancer?
The metastasis/spread of a primary cancer to a different location
___ is the technical term for a tumor growth
Neoplasm is the technical term for a tumor growth
On __% of cancers are found by a palpable mass or lump
On 10% of cancers are found by a palpable mass or lump
What are some other methods of diagnosing cancer?
• Palpable mass or lump –Detection varies by cancer type • Biopsy –Preferred method –Definitive diagnosis • Imaging technologies • Histology • Tumor markers • Grading • Staging
What is a tumor maker?
Basically blood chemistry, and it varies from by cancer type. Ex: gynecological cancer is CA125. It is a screening tool, making it highly sensitive, so they require additional testing
What is grading?
A histological and pathological activity, where they look at the abnormalities of the tissues, and with that a pathologist can give a grade.
What is a grade GX on the cancer grading system?
Grade cannot be assessed/inconclusive
undetermined grade
What is a grade G1 on the cancer grading system?
Well differentiated (low grade)
What is a grade G2 on the cancer grading system?
Moderately differentiated (intermediate grade)
What is a grade G3 on the cancer grading system?
Poorly differentiated (high grade)
What is a grade G4 on the cancer grading system?
Undifferentiated (high grade)
What is the difference between grading and staging of cancer?
Grading is a pathological exercise, while staging is a clinical exercise and is usually given by a medical/surgical oncologist
What system is usually used for cancer staging?
The TNM system
What does the summary system of cancer staging allow us to do?
Summary systems allow us to collect large amounts of data about the tumor and the cancer survivor
What is the purpose of cancer staging?
Common language, treatment
planning, prognostic, data collection
What are the elements that cancer clinical staging looks at?
- Biopsies
- Imaging
- Physical examination
- Tumor markers
- Surgical reports
True or False
Only primary tumors are staged and graded
True, Only primary tumors are staged and graded
Why aren’t recurrent and metastasis cancer staged and graded?
A metastasis is a secondary cancer, meaning that it is part of the primary cancer’s process, and most of the time when a patient has metastasis to another organ, it is considered a grade 4 and the only time it doesn’t occur is with reproductive cancers
On the TMN system, what is a primary tumor stage TX?
Primary tumor cannot be
evaluated
On the TMN system, what is a primary tumor stage T0?
No evidence of primary tumor
On the TMN system, what is a primary tumor stage Tis?
Carcinoma in situ, where the basement membrane has not broken
On the TMN system, what is a primary tumor stage T1, T2, T3, T4?
Size and/or extent of the primary tumor
On the TMN system, what is a regional lymph nodes (N)
NX?
Regional lymph nodes cannot be evaluated
On the TMN system, what is a regional lymph nodes (N)
N0?
No regional lymph node
involvement
On the TMN system, what is a regional lymph nodes (N)
N1, N2, N3?
Degree of regional lymph
node involvement (number and
location of lymph nodes)
On the TMN system, what is a Distant Metastasis: MX?
Distant metastasis cannot be
evaluated