Portal:Medicine

The Medicine Portal

Marble statue of Asclephius on a pedestal, symbol of medicine in Western medicine

Medicine is the science and practice of establishing the diagnosis, prognosis, treatment, and prevention of disease. Medicine encompasses a variety of health care practices evolved to maintain and restore health by the prevention and treatment of illness. Contemporary medicine applies biomedical sciences, biomedical research, genetics, and medical technology to diagnose, treat, and prevent injury and disease, typically through pharmaceuticals or surgery, but also through therapies as diverse as psychotherapy, external splints and traction, medical devices, biologics, and ionizing radiation, amongst others.

Medicine has been around for thousands of years, during most of which it was an art (an area of skill and knowledge) frequently having connections to the religious and philosophical beliefs of local culture. For example, a medicine man would apply herbs and say prayers for healing, or an ancient philosopher and physician would apply bloodletting according to the theories of humorism. In recent centuries, since the advent of modern science, most medicine has become a combination of art and science (both basic and applied, under the umbrella of medical science). While stitching technique for sutures is an art learned through practice, the knowledge of what happens at the cellular and molecular level in the tissues being stitched arises through science.

Prescientific forms of medicine are now known as traditional medicine and folk medicine, though they do not fall within the modern definition of “medicine” which is based in medical science. Traditional medicine and folk medicine remain commonly used with, or instead of, scientific medicine and are thus called alternative medicine (meaning “[something] other than medicine”, from Latin alter, “other”). For example, evidence on the effectiveness of acupuncture is "variable and inconsistent" for any condition, but is generally safe when done by an appropriately trained practitioner. In contrast, alternative treatments outside the bounds not just of scientific medicine, but also outside the bounds of safety and efficacy are termed quackery. Quackery can encompass an array of practices and practitioners, irrespective of whether they are prescientific (traditional medicine and folk medicine) or modern pseudo-scientific, including chiropractic which rejects modern scientific germ theory of disease (instead believing without evidence that human diseases are caused by invisible subluxation of the bones, predominantly of the spine and less so of other bones), with just over half of chiropractors also rejecting the science of immunization. Read more...

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DNA damage resulting in multiple broken chromosomes

DNA repair refers to a collection of processes by which a cell identifies and corrects damage to the DNA molecules that encode its genome. In human cells, both normal metabolic activities and environmental factors such as UV light can cause DNA damage, resulting in as many as 1 million individual molecular lesions per cell per day. Many of these lesions cause structural damage to the DNA molecule and can alter or eliminate the cell's ability to transcribe the gene that the affected DNA encodes. Other lesions induce potentially harmful mutations in the cell's genome, which will affect the survival of its daughter cells after it undergoes mitosis. Consequently, the DNA repair process must be constantly active so it can respond rapidly to any damage in the DNA structure. The DNA repair ability of a cell is vital to the integrity of its genome and thus to its normal functioning and that of the organism. Many genes that were initially shown to influence lifespan have turned out to be involved in DNA damage repair and protection. Failure to correct molecular lesions in cells that form gametes can introduce mutations into the genomes of the offspring and thus influence the rate of evolution. (More...)

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Mammo breast cancer.jpg
Normal (left) versus cancerous (right) mammography image.

Photo credit: Courtesy of the National Cancer Institute

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  • ...infantile pyloric stenosis is a not uncommon pediatric condition where there is a congenital narrowing of the pylorus (the opening at the lower end of the stomach)? Babies with this condition usually present within the first few weeks (usually between 2nd and 3rd) of life with poor feeding, weight loss and progressively worsening vomiting leading ultimately to projectile non-bilious vomiting.

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