Cancer
Detailed study of cancer, its types, causes (carcinogens), detection, diagnosis, and various treatment modalities.
What is Cancer?
New and abnormal growth of tissue, especially a tumor.
Key points
- Define cancer and its characteristics.
- Explain the cellular basis of cancer development.
- Identify various types of carcinogens and their mechanisms.
- Describe the process of metastasis.
Common exam trap
Confusing benign tumors with malignant tumors.
Definitions
- Term
Neoplasia
- Meaning
New and abnormal growth of tissue, especially a tumor.
- Term
Tumor
- Meaning
An abnormal mass of tissue that forms when cells grow and divide more than they should or do not die when they should.
- Term
Benign Tumor
- Meaning
A non-cancerous tumor that does not invade surrounding tissues or spread to other parts of the body.
- Term
Malignant Tumor
- Meaning
A cancerous tumor that can invade surrounding tissues and spread to other parts of the body (metastasize).
- Term
Metastasis
- Meaning
The spread of cancer cells from the place where they first formed to another part of the body.
- Term
Carcinogen
- Meaning
A substance or agent that causes cancer.
- Term
Oncogene
- Meaning
A gene that has the potential to cause cancer. Oncogenes arise from proto-oncogenes.
- Term
Tumor Suppressor Gene
- Meaning
A gene that protects a cell from becoming a cancer cell. When mutated or inactivated, it can contribute to cancer development.
- Term
Apoptosis
- Meaning
Programmed cell death, a normal process that eliminates damaged or unnecessary cells.
Learning objectives
Define cancer and its characteristics.
Explain the cellular basis of cancer development.
Identify various types of carcinogens and their mechanisms.
Describe the process of metastasis.
List and briefly explain common diagnostic methods.
Outline the major treatment strategies for cancer.
Prerequisites
Cell Biology (cell cycle, mitosis, apoptosis)
Genetics (genes, mutations, heredity)
Human Health and Diseases
Common mistakes
Confusing benign tumors with malignant tumors.
Underestimating the role of lifestyle factors and carcinogen exposure.
Not understanding the difference between proto-oncogenes and oncogenes.
Overlooking the importance of metastasis in cancer progression.
Keywords
Cancer
Neoplasia
Tumor
Malignant
Benign
Metastasis
Carcinogen
Oncogene
Tumor Suppressor Gene
Apoptosis
Chemotherapy
Radiation Therapy
Immunotherapy
Practice preview
The property of malignant tumor cells to spread to distant sites through blood or lymph is called:…
easy
Which diagnostic technique is primarily used to detect cancers of the internal organs like the brain and spinal cord, often providing detailed images of soft tissues without using ionizing radiation?…
medium
Which of the following statements is true regarding benign tumors?…
easy