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21 hours ago · Medical condition Myalgic encephalomyelitis/chronic fatigue syndrome Other names Post-viral fatigue syndrome (PVFS), systemic exertion intolerance disease (SEID) : 20 The four primary symptoms of ME/CFS according to the National Institute for Health and Care Excellence Specialty Rheumatology, rehabilitation medicine, endocrinology, infectious disease, neurology, immunology, general practice ...
21 hours ago · Ultraviolet ( UV) light is electromagnetic radiation of wavelengths of 10–400 nanometers, shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun. It is also produced by electric arcs, Cherenkov radiation, and ...
12 hours ago · ADHD stands for attention deficit hyperactivity disorder. This disorder is very common and affects millions of people around the world. Let’s take a look at its signs, symptoms, causes and treatments. 🍏 ADHD Meaning, Symptoms, Signs, Causes and Treatment; All You Need To Know About Attention Deficit Hyperactivity Disorder.
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Symptoms predominantly include a sore on the face or oral cavity that does not heal, trouble swallowing, or a change in voice. In those with advanced disease, there may be unusual bleeding, facial pain, numbness or swelling, and visible lumps on the outside of the neck or oral cavity. Head and neck cancer often begins with benign signs and symptoms...
Alcohol and tobacco
Around 75% of cases are caused by alcohol and tobaccouse. Tobacco smoking is one of the main risk factors for head and neck cancer. A major carcinogenic compound in tobacco smoke is acrylonitrile. Acrylonitrile appears to indirectly cause DNA damage by increasing oxidative stress, leading to increased levels of 8-oxo-2'-deoxyguanosine (8-oxo-dG) and formamidopyrimidine in DNA. (see image). Both 8-oxo-dG and formamidopyrimidine are mutagenic. DNA glycosylase NEIL1 prevents mutagenesis by 8-oxo...
Diet
In one study, excessive consumption of eggs, processed meats, and red meat was associated with increased rates of cancer of the head and neck, while consumption of raw and cooked vegetables seemed to be protective. Vitamin E was not found to prevent the development of leukoplakia, the white plaques that are the precursor for carcinomas of the mucosal surfaces, in adult smokers.Another study examined a combination of Vitamin E and beta carotene in smokers with early-stage cancer of the orophar...
Betel nut
Betel nut chewing is associated with an increased risk of squamous cell carcinomaof the head and neck.
A person usually presents to the physician complaining of one or more of the typical symptoms.[clarify] The person will typically undergo a needle biopsy of this lesion, and if histopathologic information is available, a multidisciplinary discussion of the optimal treatment strategy will be undertaken between the radiation oncologist, surgical onco...
Avoidance of recognised risk factors (such as smoking and alcohol) is the single most effective form of prevention. Regular dental examinations may identify pre-cancerous lesions in the oral cavity. When diagnosed early, oral, head, and neck cancers can be treated more easily, and the chances of survival increase tremendously.As of 2017, it was not...
Improvements in diagnosis and local management, as well as targeted therapy, have led to improvements in quality of life and survival for people with head and neck cancer. After a histologic diagnosis has been established and tumor extent determined, such as with the use of PET-CT, the selection of appropriate treatment for a specific cancer depend...
Although early-stage head and neck cancers (especially laryngeal and oral cavity) have high cure rates, up to 50% of people with head and neck cancer present with advanced disease.Cure rates decrease in locally advanced cases, whose probability of cure is inversely related to tumor size and even more so to the extent of regional node involvement.[c...
The number of new cases of head and neck cancer in the United States was 40,490 in 2006, accounting for about 3% of adult malignancies. A total of 11,170 people died of their disease in 2006. The worldwide incidence exceeds half a million cases annually. In North America and Europe, the tumors usually arise from the oral cavity, oropharynx, or lary...
Head and Neck Cancer at MedlinePlus(National Library of Medicine)Head and Neck Cancer Treatment at RadiologyInfoHead and Neck Cancer at Cancer.net (American Society of Clinical Oncology)21 hours ago · Horizontal gene transfer ( HGT) or lateral gene transfer ( LGT) [1] [2] [3] is the movement of genetic material between organisms other than by the ("vertical") transmission of DNA from parent to offspring ( reproduction ). [4] HGT is an important factor in the evolution of many organisms. [5] [6] HGT is influencing scientific understanding of ...
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