Necro: From 1 Different Sources
combining form denoting death or dissolution.
Death of tissue or cells, either from infection or the loss of normal circulation and autotoxicity.... necrosis
A traditional term for an autopsy or POSTMORTEM EXAMINATION.... necropsy
In injury to, or in?ammation of, the PANCREAS, the fat-splitting enzyme in it may escape into the abdominal cavity, causing death of fat-containing cells.... fat necrosis
Also known as CELLULITIS. A potentially lethal infection caused by the gram-positive (see GRAM’S STAIN) bacterium Streptococcus pyogenes which has the property of producing dangerous exotoxins. The infection, which starts in the layer of FASCIA under the SKIN, may spread very rapidly, destroying tissue as it spreads. Urgent antibiotic treatment may check the infection, and surgery is sometimes required, but even with treatment patients may die (see STREPTOCOCCUS).... necrotising fasciitis
A rare sexual perversion in which orgasm is achieved by means of sexual acts with dead bodies.... necrophilia
(ARN) severe inflammation and necrosis of the retina associated with inflammation and blockage of retinal blood vessels, haemorrhage and death of retinal tissue, and retinal detachment. It may affect both eyes (bilateral acute retinal necrosis, BARN), and visual prognosis is poor. ARN is thought to be due to viral infection.... acute retinal necrosis
(ATN) a condition caused by acute renal injury from either ischaemia or toxins and associated with tubular damage that is usually reversible. The earliest feature is *isosthenuria, which may occur while there is still a high urine flow rate. This is followed by a reduction in *glomerular filtration rate. *Oliguria is common and dialysis often needed for survival. If the cause of the initial damage can be removed, recovery of renal function within six weeks can be expected in most cases.... acute tubular necrosis
n. a gradual process by which cells lose their function and die. Necrobiosis lipoidica is a disease in which degeneration of collagen produces sharply demarcated yellowish-brown plaques, especially on the shins of women. The association with diabetes mellitus is controversial.... necrobiosis
n. the study of the phenomena of death, involving determination of the moment of death and the different changes that occur in the tissues of the body after death.... necrology
n. the presence of either dead or motionless spermatozoa in the semen. See infertility.... necrospermia
(NEC) a serious disease affecting the bowel during the first three weeks of life; it is much more common in preterm babies. The abdomen distends and blood and mucus appear in the stools; the bowel may perforate. Treatment is to rest the bowel and administer antibiotics. If the bowel becomes necrotic, surgery may be necessary. The cause is unknown but the disease may be the result of a reduced supply of oxygen to the bowel or infection.... necrotizing enterocolitis
(TNF) either of two proteins, TNF-? or TNF-?, that function as *cytokines. Produced by macrophages, monocytes, T lymphocytes, and various other cells, they mediate many responses, including inflammation, and have a marked action against tumour cells. Anti-TNF drugs (see cytokine inhibitor) are used in the treatment of several disorders, especially rheumatoid arthritis and ankylosing spondylitis.... tumour necrosis factor
(TEN, Lyell’s syndrome) a severe reaction to medications with a high mortality rate. Medications causing TEN include sulfonamides, anticonvulsants, antiretrovirals, and allopurinol. Widespread separation of the dead epidermal layer from underlying skin occurs, with consequent problems due to skin failure: impaired temperature regulation, infection risk, severe pain, etc. Mucous membranes are commonly affected, including the eyes (sometimes leading to blindness), mouth, and genitalia. Multi-organ failure may occur. Treatments include stopping the offending medication, good supportive nursing (usually in an ITU or HDU setting), antibiotics where appropriate, and intravenous immunoglobulin or ciclosporin.... toxic epidermal necrolysis
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