Medical dictionary

What is selective dorsal rhizotomy (SDR)? Selective Dorsal Rhizotomy (SDR) is a surgical procedure primarily used to reduce spasticity in individuals, commonly children, with conditions such as cerebral palsy. The procedure involves the precise identification and selective cutting of problematic sensory nerve roots in the lower spinal cord to reduce muscle stiffness and spasticity. &nbs

What is seborrheic dermatitis? Seborrheic dermatitis is a skin condition that primarily affects your scalp. It causes scaly patches, stubborn dandruff and red skin. The condition can also affect other oily areas of the body, such as sides of the nose, the face, ears, eyebrows, eyelids and chest. Seborrheic dermatitis is also referred to as seborrheic eczema and seborrheic psoriasis. The

What is secondary glaucoma?Glaucoma is a common eye condition where the optic nerve that connects the eye to the brain has become damaged. There are different types of glaucoma, the most common being primary open-angle glaucoma. Other types include acute angle-closure, secondary glaucoma and congenital (childhood) glaucoma. Secondary glaucoma, as the name suggests, is caused by an underl

What is being analysed? Second trimester screening during pregnancy involves analysing maternal serum markers and ultrasound findings to assess the risk of chromosomal abnormalities such as Down’s syndrome (trisomy 21), Edwards syndrome (trisomy 18), and Patau syndrome (trisomy 13), as well as neural tube defects. What does the result mean? The result provides an estimate of the

What are seizures? Seizures, or convulsions, are a medical condition where body muscles contract and relax involuntarily, resulting in an uncontrolled and unforeseeable shaking of the body. During a fit, the voluntary muscles contract and relax rapidly and repeatedly for a variable period of time. Seizures can arise if you have a high temperature or if you have any viral diseases. If you hav

What is selective laser trabeculoplasty (SLT)? Selective laser trabeculoplasty (SLT) is a type of laser surgery used to reduce intraocular pressure in the eye for patients with glaucoma. It is very effective and can be used as either an initial treatment or an additional treatment alongside eye drops and medications. The effects of selective laser trabeculoplasty are not permanent, however, and

What is a seminogram? A seminogram, also called spermogram or semen analysis, is a diagnostic test to analyse the quality of semen. A semigram measures qualities such volume, liquefaction, viscosity, colour and pH of the semen, and, on the other hand, the concentration, mobility, vitality, morphology and presence of epithelial cells or leukocytes of the spermatozoa. What happens during a

What exactly is sensory stimulation therapy? Sensory stimulation therapy is a technique based on the nightly use of simple devices that act as stimuli. It is a new, developing, experimental technique that aims to aid one's recovery from a stroke, or to simply help individuals going through cognitive ageing. It can do the world of good when it comes to improving one's overall state

What is a sentinel lymph node biopsy? A sentinel lymph node biopsy is a surgical procedure that identifies whether cancer cells have spread beyond a primary tumour and into the lymphatic system. It is most commonly used when treating breast cancer and melanoma.    Where are the sentinel lymph nodes located in the body? The sentinel nodes are the first place in which ca