Results for "cancer research"
Lymphoma
** Lymphoma is a group of malignant cancers that arise from lymphocytes, the white‑blood cells that orchestrate the body’s immune response. **CONTENT:** ## Overview Lymphoma encompasses a heterogeneous collection of **blood and lymphatic system tumors** that originate from **B‑cells or T‑cells**, the two main types of lymphocytes. Although the term “lymphoma” can technically describe any abnormal growth of lymphoid tissue, in clinical practice it is reserved for the **cancerous** forms that spread through the lymphatic network, blood, and sometimes other organs. The disease is broadly divided into **Hodgkin lymphoma (HL)**, characterized by the presence of Reed‑Sternberg cells, and **non‑Hodgkin lymphoma (NHL)**, a diverse group that accounts for roughly 85 % of all cases. Patients often present with **painless, enlarged lymph nodes**, most commonly in the neck, armpits, or groin. Systemic “B‑symptoms”—fever, drenching night sweats, and unintended weight loss—signal a more aggressive disease course. Additional complaints may include **pruritus (itching)**, persistent fatigue, and, in advanced stages, organ‑specific symptoms such as abdominal pain from splenomegaly or shortness of breath from mediastinal masses. Because early signs can mimic benign infections, a high index of suspicion and prompt diagnostic work‑up are essential. ## History/Background The first documented description of a lymphoma‑like disease dates to **1845**, when Thomas Hodgkin reported a case of “a disease of the lymphatic system” in a young man with enlarged cervical nodes. The eponymous **Hodgkin lymphoma** was formally named after him in the early 20th century. In the 1950s, the **Rappaport classification** introduced a histologic framework that distinguished between Hodgkin and non‑Hodgkin types, paving the way for modern taxonomy. The **1970s and 1980s** saw the advent of combination chemotherapy (e.g., CHOP) and the first **monoclonal antibody therapy** (rituximab) for B‑cell NHL, dramatically improving survival. Ongoing research into **genomic profiling** and **immune checkpoint inhibition** continues to refine treatment paradigms. ## Key Information - **Epidemiology:** Approximately 9 % of all cancers worldwide are lymphomas, with an incidence of ~5 per 100,000 persons annually in high‑income nations. HL shows a bimodal age distribution (young adults and >55 years), whereas NHL incidence rises steadily with age. - **Risk Factors:** Immunosuppression (HIV, organ transplantation), chronic infections (EBV, H. pylori, HTLV‑1), certain autoimmune diseases, and exposure to chemicals (pesticides, benzene) increase risk. - **Diagnosis:** Core components include **excisional lymph node biopsy**, immunophenotyping (flow cytometry), cytogenetic studies, and imaging (PET‑CT). Staging follows the **Ann Ann Arbor system**, incorporating the number of involved sites and presence of B‑symptoms. - **Treatment:** Therapeutic strategies are tailored to subtype, stage, and patient factors. First‑line regimens range from **ABVD** for early‑stage HL to **R‑CHOP** for many B‑cell NHLs. Advanced or refractory disease may require **high‑dose chemotherapy with autologous stem‑cell rescue**, **CAR‑T cell therapy**, or **immune checkpoint inhibitors** (e.g., pembrolizumab). - **Prognosis:** Five‑year survival exceeds 85 % for early‑stage HL but varies widely for NHL (from >90 % for indolent follicular lymphoma to <30 % for aggressive peripheral T‑cell lymphomas). **When to seek professional care:** Any persistent, painless swelling of lymph nodes lasting more than two weeks, unexplained fever, night sweats, weight loss, or ongoing fatigue warrants evaluation by a healthcare professional. Early diagnosis improves treatment options and outcomes. ## Significance Lymphoma’s impact extends beyond individual patients; it drives advances in **cancer biology, immunology, and targeted therapy**. The success of **rituximab**, the first monoclonal antibody approved for cancer, sparked a wave of biologic agents now standard across oncology. Moreover, lymphoma research has illuminated mechanisms of **immune evasion**, informing the development of **checkpoint inhibitors** that benefit a broad spectrum of malignancies. From a public‑health perspective, survivorship programs address long‑term effects such as secondary malignancies, cardiovascular disease, and psychosocial challenges, underscoring the need for comprehensive, multidisciplinary care. **INFOBOX:** - Name: Lymphoma (Hodgkin and Non‑Hodgkin) - Type: Malignant neoplasm of lymphoid tissue - Date: First described 1845 (Hodgkin’s disease) - Location: Primarily lymph nodes; may involve spleen, bone marrow, extranodal sites - Known For: Pioneering use of monoclonal antibodies and CAR‑T cell therapy in cancer treatment **TAGS:** lymphoma, Hodgkin lymphoma, non‑Hodgkin lymphoma, oncology, immunotherapy, chemotherapy, hematology, cancer research
Health & MedicineOvarian Cancer
Ovarian cancer is a type of cancer that originates in the ovaries, which are the female reproductive organs responsible for producing eggs, and can spread to other parts of the body, often with vague symptoms in the early stages.
ScienceBiology Encyclopedia Entry 1775710744
The Human Genome is the complete set of genetic instructions encoded in the DNA of a human being, consisting of approximately 3.2 billion base pairs and containing more than 20,000 protein-coding genes. ## Overview The Human Genome is the fundamental blueprint of human biology, governing the development, growth, and function of every cell, tissue, and organ in the human body. It is a complex, intricate system comprising DNA, RNA, and proteins that interact to regulate various biological processes. The Human Genome is made up of **deoxyribonucleic acid (DNA)**, a double-stranded helix composed of four nucleotide bases: **adenine (A)**, **guanine (G)**, **cytosine (C)**, and **thymine (T)**. The sequence of these bases determines the genetic code, which in turn dictates the synthesis of proteins, the building blocks of all living organisms. The Human Genome is estimated to contain around 20,000 to 25,000 **protein-coding genes**, which account for only a small fraction of the total DNA content. The remaining DNA is composed of **non-coding regions**, including **introns**, **exons**, and **regulatory elements**, which play crucial roles in gene expression and regulation. The Human Genome is organized into 23 pairs of **chromosomes**, with each chromosome containing hundreds to thousands of genes. ## History/Background The study of the Human Genome began in the 1970s, with the development of **restriction enzymes** and **DNA cloning** techniques. These advances enabled researchers to isolate and manipulate specific DNA sequences, paving the way for the Human Genome Project (HGP). Launched in 1990, the HGP was a collaborative effort between scientists from around the world, with the primary goal of mapping and sequencing the entire Human Genome. The project was completed in 2003, with the publication of the first draft of the Human Genome sequence. The HGP was a groundbreaking achievement, marking the beginning of a new era in genetics and genomics. The project's success was made possible by significant advances in **computational biology**, **bioinformatics**, and **genomic analysis**. The Human Genome sequence has since been refined and updated, with the current version (GRCh38) containing over 3.2 billion base pairs of DNA. ## Key Information The Human Genome is a vast, complex system that has been extensively studied in recent decades. Some key facts and achievements include: * **Genome size**: The Human Genome consists of approximately 3.2 billion base pairs of DNA. * **Gene number**: The Human Genome contains around 20,000 to 25,000 protein-coding genes. * **Chromosome number**: The Human Genome is organized into 23 pairs of chromosomes. * **DNA replication**: The Human Genome is replicated during cell division, with each chromosome consisting of two identical sister chromatids. * **Gene expression**: The Human Genome regulates gene expression through a complex interplay of transcription factors, enhancers, and other regulatory elements. ## Significance The Human Genome has far-reaching implications for various fields, including medicine, agriculture, and biotechnology. Some of the key significance of the Human Genome includes: * **Personalized medicine**: The Human Genome sequence can be used to tailor medical treatments to an individual's specific genetic profile. * **Genetic disease diagnosis**: The Human Genome can be used to identify genetic mutations associated with inherited diseases. * **Cancer research**: The Human Genome has provided insights into the genetic mechanisms underlying cancer development and progression. * **Synthetic biology**: The Human Genome has enabled the design and construction of new biological pathways and organisms. INFOBOX: - Name: Human Genome - Type: Genetic blueprint - Date: 2003 (completion of the Human Genome Project) - Location: Global - Known For: Providing the complete set of genetic instructions for human biology TAGS: Human Genome, genetics, genomics, DNA, protein-coding genes, non-coding regions, chromosomes, gene expression, personalized medicine, genetic disease diagnosis, cancer research, synthetic biology.
SportsSports Encyclopedia Entry 1777786384
** The **Boston Marathon**, one of the world's most prestigious long-distance running events, is a 42.195-kilometer road race held annually in Boston, Massachusetts, USA. ## Overview The Boston Marathon is the world's oldest annual marathon, first held in 1897. It is a premier event in the world of distance running, attracting top athletes from around the globe. The marathon is part of the BAA (Boston Athletic Association) and is sanctioned by USA Track & Field (USATF). The event is held on Patriots' Day, the third Monday in April, and is a significant tourist attraction for the city of Boston. The Boston Marathon is known for its challenging course, which includes a grueling hill at Heartbreak Hill and a downhill finish. The event has a long history of producing record-breaking performances, with many world-class athletes competing in the marathon. The Boston Marathon is also famous for its iconic finish line, which is located on Boylston Street in downtown Boston. The Boston Marathon has a strong tradition of community involvement, with thousands of volunteers and spectators lining the course each year. The event also has a significant charitable component, with the Boston Marathon Jimmy Fund raising millions of dollars for cancer research and patient care. ## History/Background The Boston Marathon was first held on April 19, 1897, as part of the Boston Marathon's precursor, the Boston Athletic Association's (BAA) annual road racing competition. The first winner of the marathon was John J. McDermott, an American distance runner who completed the course in 2:55:10. The event was initially met with skepticism, with many doubting the feasibility of running 26.2 miles on foot. Over the years, the Boston Marathon has grown in popularity, with the event becoming a premier destination for distance runners. In 1966, the Boston Marathon was officially recognized as the world's oldest annual marathon by the International Association of Athletics Federations (IAAF). The event has continued to evolve, with the introduction of women's competition in 1972 and the implementation of strict qualifying standards in the 1980s. ## Key Information * **Course:** The Boston Marathon course is a point-to-point course that starts in Hopkinton, Massachusetts, and finishes on Boylston Street in downtown Boston. * **Distance:** The marathon is 42.195 kilometers (26.2 miles) long. * **Elevation:** The course has a total elevation gain of 152 meters (499 feet). * **Finishers:** Over 30,000 runners have completed the Boston Marathon since its inception. * **Record holders:** The men's record holder is Geoffrey Mutai, who completed the course in 2:03:02 in 2011. The women's record holder is Brigid Kosgei, who completed the course in 2:14:04 in 2019. * **Notable winners:** Past winners of the Boston Marathon include Olympic champions, world record holders, and other notable distance runners. ## Significance The Boston Marathon is one of the most prestigious events in the world of distance running, attracting top athletes from around the globe. The event has a significant impact on the city of Boston, generating millions of dollars in revenue and attracting thousands of tourists. The Boston Marathon also has a strong charitable component, with the Boston Marathon Jimmy Fund raising millions of dollars for cancer research and patient care. The Boston Marathon is also an important cultural event, with a strong tradition of community involvement and spectatorship. The event has been the subject of numerous books, films, and documentaries, and has been featured in various forms of media. INFOBOX: - **Name:** Boston Marathon - **Type:** Road racing - **Date:** Third Monday in April - **Location:** Boston, Massachusetts, USA - **Known For:** World's oldest annual marathon TAGS: Boston Marathon, marathon, road racing, distance running, athletics, sports, Boston, Massachusetts, Patriots' Day, BAA, USATF, Jimmy Fund, cancer research, patient care.