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Waxing
Waxing (epilation by waxing) is temporary hair removal in which hot or cold wax pulls hairs out from the root; results last 2-8 weeks, with risks of pain, burns, folliculitis, and retinoid-related skin tearing.
WAY-100635
WAY-100635 is a phenylpiperazine that acts as a potent silent antagonist of the serotonin 5-HT1A receptor, and labeled with carbon-11 it became the first PET radioligand for imaging 5-HT1A receptors in the living human brain.
Wayne Joseph Riley
Wayne Joseph Riley is an American internist and physician executive who has served since 2017 as the 17th president of SUNY Downstate Health Sciences University in Brooklyn, New York.
WBVibration trial
WBVibration (NCT06330311) is a Madrid randomized controlled trial adding whole-body vibration to physiotherapy in 30 children with spastic cerebral palsy; it found no additional benefit over intensive physiotherapy alone.
Weaning
Weaning is the process of switching an infant's diet from breast milk or formula to other foods and fluids, typically beginning around 6 months of age alongside continued breastfeeding.
Weaning protocol (mechanical ventilation)
A weaning protocol is a standardized clinical pathway of daily readiness screening, stepwise support reduction, and spontaneous breathing trials that shortens mechanical ventilation in critically ill adults.
Weathered hair
Weathered hair (ICD-11 ED73.0) is acquired hair shaft damage from sunlight, wetting, chemicals, and physical trauma, causing dull, fracture-prone hair; its main sign is trichorrhexis nodosa, nodes with brush-like cortical fraying.
Weaver syndrome
Weaver syndrome, also called EZH2-related overgrowth syndrome or Weaver-Smith syndrome, is a rare autosomal dominant overgrowth disorder caused by EZH2 mutations, with tall stature, advanced bone age, distinctive facies, mild intellectual disability, and possible neuroblastoma risk.
Webbed fingers
Webbed fingers, medically syndactyly of the hand (ICD-11 LB79.1), is a congenital fusion of adjacent digits by skin or bone, occurring in about 2–3 per 10,000 births, usually autosomal dominant, and treated by surgical separation around age one.
Webbed neck
Webbed neck (pterygium colli, ICD-11 LA60) is a congenital bilateral skin fold from mastoid to acromion, mainly in Turner and Noonan syndromes, corrected surgically by Z-plasty and other flap techniques.
Webbed penis
Webbed penis, or penoscrotal webbing (PSW), is a congenital or post-circumcision skin fold obscuring the penoscrotal angle; graded 1-3 by El-Koutby, treated by scrotoplasty.
Webbed toes
Webbed toes, the toe form of syndactyly, are digits fused by skin or bone, occurring in about 1 in 2,000 to 2,500 births, most often between the 2nd and 3rd toes, often hereditary, and treated by surgical separation with flaps and grafts.
Weber test
Weber test: bedside hearing test, created by Ernst Heinrich Weber in 1834, placing a 512-Hz tuning fork on the midline skull; sound lateralizes toward a conductive loss and away from a sensorineural loss, complementing the Rinne test.
WebMD
WebMD is an American provider of health information services founded in Atlanta in 1998, known for its consumer website offering medical news, drug and condition references, and symptom checkers.
Wedge biopsy
A wedge biopsy is a surgical technique that removes a wedge-shaped piece of liver or lung tissue for diagnosis, usually during open surgery, laparoscopy, or VATS.
Wedge osteotomy
Wedge osteotomy is a procedure that removes or opens a wedge of bone to realign a limb or spine, used most often around the knee for arthritis.
Wedge resection
Wedge resection is a surgical procedure that removes a small, wedge-shaped portion of an organ, most often the lung, typically with a stapler rather than anatomic dissection.
Wedging of vertebra
Wedging of vertebra (ICD-11 ME92.0, 楔状椎) is a radiological finding of asymmetric vertebral body height loss, usually anterior. Mild wedging is physiological, greatest at the thoracolumbar junction; marked wedging suggests wedge compression fracture, Scheuermann's disease, or scoliosis.
Weight cutting
Weight cutting: rapid body mass reduction before weigh-ins in weight-class combat sports like boxing, wrestling, judo, and MMA, using dieting, dehydration, and water loading; cuts up to about 5% with rehydration generally preserve strength and power, larger cuts carry health risks.
Weight gain
Weight gain: increase in body weight from energy intake exceeding expenditure; unintentional gain signals causes such as medicines, hypothyroidism, Cushing syndrome, fluid retention, menopause, or smoking cessation.
Weight loss
Weight loss: deliberate reduction of body mass via negative energy balance. CDC advises 1–2 lb/week; 5% loss improves health markers; diets differ little long-term; adaptive thermogenesis resists loss; GLP-1 drugs now covered by Medicare trial.
Weight-Bearing
Weight-bearing is the physical state of supporting an applied load, typically body weight carried by the spine, hip, knee, and foot; weight-bearing exercise strengthens bone, unlike swimming or cycling.
Weight-bearing computed tomography
Weight-bearing computed tomography (WBCT) is a cone-beam CT technique that images joints, usually in the foot and ankle, while the patient stands, recording alignment under load.
Weill-Marchesani syndrome
Weill-Marchesani syndrome (Spherophakia-Brachymorphia syndrome) is a rare connective tissue disorder with microspherophakia, ectopia lentis, glaucoma, short stature, and brachydactyly, caused by ADAMTS10, ADAMTS17, LTBP2, or FBN1 variants.
Weismann-Netter syndrome
Weismann-Netter syndrome (Weismann-Netter-Stuhl syndrome, toxopachyostéose diaphysaire tibio-péronière, OMIM 112350) is a rare genetic bent bone dysplasia with anterior tibial and fibular bowing, fibular tibialization, posterior cortical thickening, and short stature.
Weiss-Kruszka Syndrome
Weiss-Kruszka syndrome (ZNF462 disorder, metopic ridging-ptosis-facial dysmorphism syndrome) is a rare autosomal dominant neurodevelopmental disorder caused by loss-of-function ZNF462 variants, with metopic ridging, ptosis, developmental delay, autistic features, and congenital anomalies.
Welding fume exposure
Welding fume exposure is welders' inhalation of the fine particles and gases from melted metal, which IARC classified as carcinogenic to humans in 2017, raising lung cancer risk.
Welfare in California
Welfare in California centers on CalWORKs, the state's TANF cash aid program created in 1997, alongside CalFresh (SNAP), Medi-Cal, and WIC, administered by counties in all 58 California counties.
Well-differentiated fetal adenocarcinoma of the lung
Well-differentiated fetal adenocarcinoma of the lung (WDFA, low-grade fetal adenocarcinoma) is a rare low-grade lung adenocarcinoma mimicking fetal lung, β-catenin-driven, occurring in young adults, treated by surgery with a good prognosis.
Wellens' syndrome
Wellens' syndrome (LAD coronary T-wave syndrome): pain-free ECG pattern of biphasic or deeply inverted precordial T waves (V2-V3) signaling critical proximal left anterior descending stenosis; first described 1982; high specificity, low sensitivity; needs urgent PCI, not stress testing.