cancer

cancer
Stevenfruitsmaak · CC BY-SA 4.0 · source
Name	Cancer
Field	Oncology, Pathology

cancer

Cancer is a group of diseases characterized by uncontrolled cell growth and the potential to invade or spread to other parts of the body. It is studied within Oncology, Pathology, Molecular biology, Genetics, and treated by specialties including Radiology and Surgery. Major institutions involved in research and care include the World Health Organization, National Cancer Institute (United States), American Cancer Society, Dana-Farber Cancer Institute, and Memorial Sloan Kettering Cancer Center.

Overview

Cancer arises when somatic or germline alterations disrupt normal regulatory mechanisms such as cell cycle checkpoints, apoptosis, and DNA repair. Foundational research from laboratories like the Cold Spring Harbor Laboratory and discoveries by scientists associated with the Nobel Prize have shaped modern understanding. Clinical management blends contributions from centers such as Mayo Clinic, Johns Hopkins Hospital, and Cleveland Clinic. Public health responses involve agencies including the Centers for Disease Control and Prevention and international initiatives like the Union for International Cancer Control.

Causes and Pathophysiology

Carcinogenesis involves initiation, promotion, and progression driven by mutations, epigenetic changes, and microenvironmental factors. Key molecular players discovered in studies at institutions like Harvard Medical School and Massachusetts Institute of Technology include oncogenes (e.g., discoveries linked to Alfred G. Knudson-type hypotheses) and tumor suppressors studied in contexts such as the Knudson hypothesis and research connected to the Nobel Prize in Physiology or Medicine. Viral oncogenesis has been elucidated through work on Human papillomavirus, Epstein–Barr virus, and research linked to Peyton Rous (Rous sarcoma virus). Carcinogenic exposures identified through investigations by the International Agency for Research on Cancer and regulatory actions by the U.S. Environmental Protection Agency include tobacco smoke (historic litigation and regulation involving entities like Philip Morris International), ionizing radiation studies from events such as Chernobyl disaster and Hiroshima and Nagasaki bombings, and occupational hazards examined in cases like those involving Asbestos litigation and research.

At the tissue level, hallmarks delineated by researchers associated with universities like Stanford University and University of Cambridge include sustained proliferative signaling, evasion of growth suppressors, resistance to cell death, enabling replicative immortality, inducing angiogenesis, and activating invasion and metastasis. Tumor microenvironment research from groups at Fred Hutchinson Cancer Research Center and Salk Institute highlights roles for stromal cells, immune infiltration studied in contexts including James P. Allison-related immunotherapy research, and metabolic rewiring traced in metabolic studies linked to Otto Warburg-inspired investigations.

Types of Cancer

Cancers are classified by tissue of origin and cell type: carcinomas (epithelial; examples investigated in centers like MD Anderson Cancer Center), sarcomas (mesenchymal; case series from institutions including Royal Marsden Hospital), hematologic malignancies (leukemias, lymphomas; landmark trials at Fred Hutchinson Cancer Research Center), and central nervous system tumors (neurosurgical series from Karolinska Institute). Specific named entities include breast cancer (studied extensively at Susan G. Komen Foundation-funded programs), prostate cancer (work at European Urology Association meetings), lung cancer (screening trials linked to National Lung Screening Trial), colorectal cancer (screening and treatment guidelines from European Society for Medical Oncology), and melanoma (immunotherapy milestones tied to James P. Allison and Tasuku Honjo).

Diagnosis and Staging

Diagnosis relies on histopathology, molecular profiling, and imaging modalities refined by collaborations among Radiology departments at places like Mayo Clinic and pathology laboratories at Memorial Sloan Kettering Cancer Center. Staging systems such as the TNM classification and disease-specific schemes published with input from organizations like the American Joint Committee on Cancer guide prognosis. Biomarker discovery owes much to consortia including the Cancer Genome Atlas and translational programs at Wellcome Trust Sanger Institute.

Treatment and Management

Therapies include surgery, radiation therapy, systemic treatments (chemotherapy, targeted therapy, immunotherapy), and supportive care. Advances in targeted agents emerged from pharmaceutical collaborations involving Pfizer, Roche, and biotech firms at Silicon Valley-area incubators; immuno-oncology breakthroughs involved investigators connected to University of Texas MD Anderson Cancer Center and trials sponsored by cooperative groups like the European Organisation for Research and Treatment of Cancer. Multimodal care pathways incorporate palliative expertise as practiced at hospices affiliated with organizations such as Hospice UK and survivorship programs developed at St. Jude Children's Research Hospital.

Epidemiology and Risk Factors

Global burden assessments by World Health Organization and analytic work by the Institute for Health Metrics and Evaluation quantify incidence and mortality by region, age, and sex. Major modifiable risk factors include tobacco use (public health campaigns led by Centers for Disease Control and Prevention), alcohol consumption (studies promoted by World Cancer Research Fund International), infections (prevention through World Health Organization vaccination programs), and occupational exposures investigated in landmark occupational health cases such as those involving Asbestos. Socioeconomic determinants and disparities have been documented in health services research from institutions like University of California, San Francisco and Imperial College London.

Prevention and Screening

Primary prevention strategies emphasize vaccination programs (e.g., initiatives led by Gavi, the Vaccine Alliance for Human papillomavirus vaccine), tobacco control policies advocated by Framework Convention on Tobacco Control, and environmental regulation guided by bodies such as the International Agency for Research on Cancer. Screening programs—mammography, colonoscopy, low-dose CT—have been evaluated in trials including the National Lung Screening Trial and implementation studies conducted by public health agencies like Public Health England. Risk-reduction counseling and chemoprevention trials have been coordinated by cooperative groups such as the National Surgical Adjuvant Breast and Bowel Project.

Category:Oncology