Molecular Biology of Cancer BC 504
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Questions and Answers

What type of cancer originates in the plasma cells of bone marrow?

  • Leukemia
  • Sarcoma
  • Lymphoma
  • Myeloma (correct)
  • Which of the following cancers is categorized as a sarcoma?

  • Myeloma
  • Basal cell carcinoma
  • Lymphoma
  • Angiosarcoma (correct)
  • What is a common source of mutations that can lead to cancer?

  • Electrical impulses in the body
  • Routine metabolic processes
  • Vital organ functionality
  • Inherited mutations (correct)
  • Which type of cancer has the highest incidence rate among both sexes?

    <p>Lung (A)</p> Signup and view all the answers

    Which of the following cancers arise from epithelial cells?

    <p>Carcinoma (C)</p> Signup and view all the answers

    What percentage of colorectal cancer cases occur in males?

    <p>10.9% (D)</p> Signup and view all the answers

    In cancer development, what is the term for the mass of abnormal cells?

    <p>Tumor (C)</p> Signup and view all the answers

    Which type of cancer accounts for the most deaths among females?

    <p>Lung (B)</p> Signup and view all the answers

    What is the total estimated number of new cancer cases for females in 2023 in the United States?

    <p>940,000 (D)</p> Signup and view all the answers

    What is a characteristic of mixed type cancers?

    <p>They show characteristics of multiple cell or tissue types. (C)</p> Signup and view all the answers

    What factor is NOT considered an external factor in the development of cancer?

    <p>Inherited mutations (D)</p> Signup and view all the answers

    Which cancer type has the lowest incidence among males?

    <p>Leukemia (B)</p> Signup and view all the answers

    Which of the following indicates the process of cancer spreading to other parts of the body?

    <p>Metastasis (D)</p> Signup and view all the answers

    Which cancer has the highest mortality rate among all sites combined?

    <p>Lung and bronchus (B)</p> Signup and view all the answers

    Which site of cancer has an equal incidence rate for males and females?

    <p>Urinary bladder (B)</p> Signup and view all the answers

    Which type of cancer is the second highest cause of death among females?

    <p>Breast (D)</p> Signup and view all the answers

    How many new cases of leukemia are estimated for females in 2023?

    <p>30,590 (B)</p> Signup and view all the answers

    What is expected to happen to the incidence of cancers in high HDI countries by 2040?

    <p>An increase of 4.1 million new cases compared to 2020 (D)</p> Signup and view all the answers

    What is the initial event in the multistep genetic model for colorectal adenocarcinoma?

    <p>Mutation in the APC tumor suppressor gene (D)</p> Signup and view all the answers

    Which of the following best describes malignant tumors?

    <p>They can invade surrounding tissues and metastasize (D)</p> Signup and view all the answers

    Which of the following is NOT one of the six essential alterations in cell physiology that dictate malignant growth?

    <p>Increased immune response (B)</p> Signup and view all the answers

    What was the percentage increase in total cancer cases in Egypt in 2020?

    <p>4.5% (C)</p> Signup and view all the answers

    What does the term metastasis refer to in cancer biology?

    <p>The spread of cancer from primary to secondary sites (C)</p> Signup and view all the answers

    What role do methylation changes play in the evolution of cancer?

    <p>They contribute to the genetic changes transferred to progeny of malignant cells. (B)</p> Signup and view all the answers

    Which risk factor category includes factors that cannot be modified?

    <p>Intrinsic risk factors (B)</p> Signup and view all the answers

    Which of the following statements about benign tumors is correct?

    <p>They grow slowly and have distinct borders (B)</p> Signup and view all the answers

    What is the final stage in the malignant transformation process of liver cells leading to HCC?

    <p>Tumor development (D)</p> Signup and view all the answers

    What is the primary tissue type from which carcinoma originates?

    <p>Epithelial tissue (D)</p> Signup and view all the answers

    What is likely to happen to cancer mortality rates if health resources are not improved?

    <p>They will likely increase along with cancer incidence (C)</p> Signup and view all the answers

    Which of the following best describes the relationship between the hallmark capabilities of cancer?

    <p>They are shared among all types of human tumors. (A)</p> Signup and view all the answers

    What common factor is involved in the transformation of normal liver cells to hepatocellular carcinoma?

    <p>Epigenetic changes and environmental factors (A)</p> Signup and view all the answers

    Which option describes a necessary action to manage the increasing incidence of cancer effectively?

    <p>Investing in health services for treatment and management (C)</p> Signup and view all the answers

    Which of the following is considered a core hallmark of cancer in addition to the traditional six?

    <p>Deregulating cellular metabolism (D)</p> Signup and view all the answers

    What is the leading cause of cancer death worldwide?

    <p>Lung cancer (C)</p> Signup and view all the answers

    Which cancer type is projected to see the highest incidence in 2040?

    <p>Breast cancer (C)</p> Signup and view all the answers

    Which type of cancer has the highest crude rate according to the data provided?

    <p>Liver cancer (B)</p> Signup and view all the answers

    Among men, which cancer follows lung cancer in terms of incidence?

    <p>Prostate cancer (C)</p> Signup and view all the answers

    What percentage of newly diagnosed cancer cases do the top 10 cancer types account for?

    <blockquote> <p>60% (B)</p> </blockquote> Signup and view all the answers

    What is the estimated number of new cancer cases projected for 2040?

    <p>28.4 million (A)</p> Signup and view all the answers

    Which cancer is not mentioned as a top cancer type among women in terms of diagnosis?

    <p>Ovarian cancer (A)</p> Signup and view all the answers

    What relationship is indicated between socioeconomic development and cancer prevalence?

    <p>Lower socioeconomic status increases cancer risk factors. (A)</p> Signup and view all the answers

    Flashcards

    Cancer incidence rates

    The rate at which new cases of cancer occur in a population.

    Cancer mortality

    The rate at which people die from cancer.

    Lung cancer - incidence (both sexes)

    Lung cancer is the most prevalent cancer type for both sexes in the data provided.

    Breast cancer - incidence (females)

    The second most prevalent cancer among females.

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    Prostate cancer incidence (males)

    The most frequent cancer type for males.

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    Colon and Rectum Cancer - incidence (both sexes)

    Third most common type of cancer for both genders across the given incidence data.

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    Lung Cancer - mortality (both sexes)

    Most frequent cause of cancer-related deaths for both sexes.

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    Prostate Cancer - mortality (males)

    Frequently fatal cancer among males.

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    Colon and Rectum Cancer - mortality (both sexes)

    Third most frequent cause of cancer deaths for both genders.

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    Lung cancer - mortality rate - males

    The leading cause of cancer death in males.

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    Cancer burden

    The overall impact of cancer on a population, measured by incidence and mortality rates.

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    Cancer incidence

    The number of new cancer cases diagnosed in a population during a specific time period.

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    Cancer risk factors

    Factors that increase the likelihood of developing cancer, such as smoking, lack of physical activity, and unhealthy diet.

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    HDI (Human Development Index)

    A measure that combines life expectancy, education levels, and income to assess a country's overall development.

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    Transitioning/Emerging Economies

    Countries with low or medium HDI, characterized by rapid economic and social change.

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    Transitioned/Higher HDI Economies

    Countries with high or very high HDI, typically more developed and affluent.

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    Cancer projection

    An estimate of the future number of cancer cases and deaths based on current trends and risk factors.

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    What is metastasis?

    The spread of cancer cells from the primary tumor to other parts of the body, typically through the bloodstream or lymphatic system.

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    What are benign tumors?

    Tumors that grow slowly, have distinct borders, and do not invade surrounding tissues or spread to other parts of the body.

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    What are malignant tumors?

    Tumors that can grow quickly, have irregular borders, invade surrounding tissues, and spread to other parts of the body through a process called metastasis.

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    What is carcinoma?

    A type of cancer that originates from the epithelial layer of cells, which form the lining of external parts of the body or internal linings of organs.

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    What does 'HDI' stand for?

    Human Development Index

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    How is cancer incidence expected to change in the next two decades?

    Global cancer incidence is predicted to increase significantly, particularly in low and medium HDI countries.

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    Where is the largest increase in cancer incidence expected?

    High HDI countries are expected to see the largest increase in absolute terms, with millions more new cases by 2040.

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    Why is it crucial to invest in healthcare resources?

    Increasing cancer incidence necessitates investment in healthcare services to effectively treat and manage the growing number of patients.

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    What are the 3 main types of cancer based on cell/tissue origin?

    The three main types of cancers are Myeloma, Sarcoma, and Lymphoma. Myeloma originates in plasma cells of bone marrow; Sarcoma originates in connective tissues (including muscles, bones, cartilage, and fat); and Lymphoma originates in the lymphatic system.

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    What is Leukemia?

    Leukemia is a group of cancers that affect blood cells, specifically originating in the bone marrow.

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    What are Carcinomas?

    Carcinomas are cancers that originate from epithelial cells. Epithelial cells are found in the skin, lining of body cavities, and organs.

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    What are Sarcomas?

    Sarcomas are cancers that originate from bone and soft tissues, such as muscles, cartilage, and fat.

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    What are Myelomas?

    Myelomas are cancers that originate from plasma cells, which are responsible for producing antibodies in the immune system.

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    What are Leukemias?

    Leukemias are cancers that originate in the blood cells, specifically starting in the bone marrow.

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    What are Lymphomas?

    Lymphomas are cancers that originate in the lymphatic system, which includes lymph nodes, spleen, and other immune tissues.

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    How does cancer originate?

    Cancer originates from a single abnormal cell with altered DNA. This cell undergoes multiple rounds of mutations and natural selection, leading to a mass of abnormal cells called a tumor. Some cells in the tumor acquire further mutations and become malignant, capable of spreading (metastasis).

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    Malignant Transformation

    The process by which a normal cell becomes a cancerous cell. This involves a series of genetic and epigenetic changes, eventually leading to uncontrolled growth and spread.

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    Inherited mutation

    A genetic alteration passed down from parents to offspring, increasing cancer risk.

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    Somatic mutation

    A genetic alteration acquired during a person's lifetime, causing changes within a single cell and its descendants.

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    Epigenetic alterations

    Changes in gene expression without altering the DNA sequence, influencing cell growth and development.

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    Hallmarks of Cancer

    Six key characteristics that define cancerous cells, enabling them to survive, grow, and spread.

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    Self-sufficiency in growth signals

    Cancer cells can grow without external signals, unlike normal cells.

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    Insensitivity to antigrowth signals

    Cancer cells ignore signals that normally stop cell growth.

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    Evasion of apoptosis

    Cancer cells evade programmed cell death, contributing to uncontrolled growth.

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    Study Notes

    Molecular Biology of Cancer BC 504

    • This course covers molecular biology of cancer
    • Dr. Amany H. Adam, Ph.D. is the presenter.
    • She is a lecturer in Biochemistry, in the Faculty of Science at Damanhour University.

    Cancer Epidemiology

    • Cancer incidence and mortality are increasing globally.
    • Normal cells multiply, abnormal cells multiply, and it can become malignant/cancerous cells.
    • This diagram depicts normal cells, abnormal cells, and cancerous cells.

    Distribution of Cases & Deaths (2018, 2020, 2021)

    • Data presented in pie charts showing incidence and mortality rates for the top 10 cancers in both sexes, males, and females.
    • Cancers like Lung, Breast, Colorectum, and Prostate are frequent and are in the top 10 most common cases in these years.
    • Different cancers have different percentages of incidence and mortality rates, varying across genders and between years (2018, 2020, and 2021).

    Cancer Statistics (2023)

    • The data showcases the estimated new cases and deaths in the United States for the top ten leading cancer types in males and females and in general.
    • Lung and Bronchus, Colon and Rectum, Urinary Bladder, and Melanoma of the skin are prominent cancer types.

    Cancer in Egypt (2008-2011) and 2018-2020.

    • Data displays frequency of cancers (e.g., Liver, Bladder) and their Crude rate and ASR data across various years.
    • Information is presented in tables, charts and graphs depicting cancer incidence trends between 2018, 2020 for men and women, and the period of 2008 to 2011 in Egypt.

    What is Cancer?

    • Cancer is a set of diseases characterized by uncontrolled cell growth, invasion and metastasis.
    • Over 100 different types of cancer exist.

    Benign vs Malignant

    • Benign tumors do not invade surrounding tissue or spread.
    • Malignant tumors invade, damage surrounding tissues, and can spread (metastasize).

    Classification of Cancer by Tissue

    • Carcinomas develop in epithelial tissue (e.g., skin, lungs, breast)
    • Sarcomas develop in connective tissue (e.g., bones, muscles)
    • Adenocarcinomas are a type of carcinoma that starts in glands

    Cancer Arises

    • Cancer develops from mutations in a single cell which lead to uncontrolled proliferation.
    • The development of cancer, from normal cells to cancerous cells, occurs in multiple steps, which may take many years.

    Insights into Cancer

    • Cancer results from environmental factors (chemicals, radiation), genetics, and internal factors (inflammation, hormones).
    • These factors can initiate or progress the disease.

    Molecular Basis of Cancer

    • Cancer develops from a series of genetic and epigenetic changes.
    • Malignant transformation involves several steps.
    • The progression, from a normal cell to a cancerous one, involves multiple genetic aberrations (mutations, epigenetic alterations).

    Risk Factors for Cancer Development

    • Cancer risk factors are categorized as Intrinsic (uncontrollable, e.g., age) and Exogenous (controllable, e.g., smoking).
    • Non-intrinsic (non-modifiable) factors - endogenous risks(inside the body), intrinsic factors (biological aging)
    • Exogenous (modifiable) factors - exogenous factors (environmental exposure, lifestyle choices)

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    Description

    Explore the intricate world of cancer through the lens of molecular biology. This course, presented by Dr. Amany H. Adam, delves into the mechanisms behind cancer progression, epidemiology, and current statistical trends across various types of cancer. Gain deeper insights into the factors contributing to increasing cancer rates globally.

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