PSY-3635 Lecture Notes - Lecture 27: Squamous Cell Carcinoma, Basal-Cell Carcinoma, Cryosurgery
25 Nov 2017
School
Department
Course
Professor
Document Summary
What is cancer: many diseases are called cancer, all involve uncontrolled cell growth and proliferation of abnormal cells, uncontrolled cell growth can produce tumors that crowd out and damage healthy tissue. If untreated, most cancers spread to the point that they cause death. Cancer formation: starts with a dna mutation, certain dna segments, oncogenes, regulate cellular growth, mutations or damage to oncogenes can lead to uncontrolled growth, everyone produces cancerous cells from time to time. Usually they are targeted and destroyed by the immune system: sometimes the immune system fails to kill cancer cells and a tumor develops. Exposure to a cancer causing agent a carcinogen. Major types of cancer: adenocarcinoma glandular tissue, blastoma embryonic tissue or organs, carcinoma epithelial tissue (skin and, myeloma bone marrow, sarcoma connective or supportive tissue (e. g. , bone, cartilage, muscle) Lymphoma lymphatic tissue tissue that lines organs and tubes)
