- Cystic fibrosis
- One of the most common grave genetic (inherited) diseases, CF affects the exocrine glands and is characterized by the production of abnormal secretions, leading to mucous build-up. This accumulation of mucus can impair the pancreas and, secondarily, the intestine. Mucous build-up in lungs tends progressively to impair respiration. Without treatment, CF results in death for 95% of affected children before age 5. However, with diligent medical care patients with CF are surviving even beyond middle age. Early diagnosis of CF is of great importance. Early and continuing treatment of CF is essential for long-term survival. However, as more people with CF survive childhood, new problems are emerging. For example, 68% of 75 adult women with CF reported leakage of urine within the past year. Coughing, sneezing, laughing and airway clearance provoked the leakage, which was worse when their chest disease was most severe. CF is inherited in an autosomal recessive manner and affects both boys and girls. One in 400 white couples is at risk for having children with CF and their risk with each pregnancy is 1 in 4, so (multiplying 1 in 400 times 1 in 4) the overall risk that their child will have CF is 1 in 1600. Note that once a couple has had a CF child, the risk that each of their subsequent children will have CF drops to 1 in 4 (25%). The treatment of CF includes physical therapy to loosen the mucus in the lungs, pancreatic enzymes, and medications to fight dangerous infections of the lungs. CF is caused by mutations in a gene called CFTR (for the cystic fibrosis conductance regulator), which is located on chromosome 7.
* * *cystic fibrosis n a hereditary disease prevalent esp. in Caucasian populations that appears usu. in early childhood, is inherited as an autosomal recessive monogenic trait, involves functional disorder of the exocrine glands, and is marked esp. by faulty digestion due to a deficiency of pancreatic enzymes, by difficulty in breathing due to mucus accumulation in airways, and by excessive loss of salt in the sweat called also fibrocystic disease of the pancreas, mucoviscidosis
* * *a hereditary disease affecting cells of the exocrine glands (including mucus-secreting glands, sweat glands, and others). The faulty gene responsible has been identified as lying on chromosome no. 7 and is recessive, i.e. both parents of the patient can be carrier without being affected by the disease. Affected individuals lack a protein, cystic fibrosis transmembrane regulator (CFTR), that enables the transport of chloride ions across cell membranes: this results in the production of thick mucus, which obstructs the intestinal glands (causing meconium ileus in newborn babies), pancreas (causing deficiency of pancreatic enzymes resulting in malabsorption and failure to thrive), and bronchi (causing bronchiectasis). Respiratory infections, which may be severe, are a common complication. Common agents include Haemophilus, Pseudomonas, Staphylococcus, and Burkholderia cepacia. The sweat contains excessive amounts of sodium and chloride, which is an aid to diagnosis.Treatment consists of minimizing the effects of the disease by administration of pancreatic enzymes and physiotherapy for the lungs and by preventing and combating secondary infection. Sputum viscosity can be reduced by nebulized recombinant human DNAse. genetic counselling is essential, as each subsequent child of carrier parents has a one in four chance of being affected (see also mouthwash test). Some patients are benefiting from revolutionary new treatments, including transplantation of heart and lungs and treatment aimed at altering the genetic content of the faulty cells (see gene therapy).
* * *cystic fibrosis of pancreas an autosomal recessive disorder of infants, children, and young adults in which there is widespread dysfunction of the exocrine glands, with signs of chronic pulmonary disease (due to excess mucus production in the respiratory tract), pancreatic insufficiency, abnormally high levels of electrolytes in the sweat, and occasionally biliary cirrhosis. Pathologically, the pancreas shows obstruction of its ducts by amorphous eosinophilic concretions, causing the insufficiency and resultant steatorrhea and azotorrhea. The degree of involvement of organs and glandular systems may vary greatly, with consequent variations in the clinical picture. It is caused by mutations in the CFTR gene, which encodes the cystic fibrosis transmembrane regulator (q.v.), a cAMP-regulated chloride channel that regulates other ion channels.
Medical dictionary. 2011.
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cystic fibrosis — n. a congenital disease, usually of children, characterized by fibrosis and malfunctioning of the pancreas, and by frequent respiratory infections … English World dictionary
cystic fibrosis — cystic fibrosis. См. муковисцидоз. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) … Молекулярная биология и генетика. Толковый словарь.
cystic fibrosis — ► NOUN ▪ a hereditary disorder which affects the exocrine glands, resulting in the production of abnormally thick mucus and leading to the blockage of the pancreatic ducts, intestines, and bronchi … English terms dictionary
cystic fibrosis — Pathol. a hereditary chronic disease of the exocrine glands, characterized by the production of viscid mucus that obstructs the pancreatic ducts and bronchi, leading to infection and fibrosis. [1950 55] * * * ▪ pathology also called… … Universalium
cystic fibrosis (CF) — or mucoviscidosis Inherited metabolic disorder characterized by production of thick, sticky mucus. It is recessive (see recessiveness) and the most common inherited disorder (about 1 per 2,000 live births) in those of European ancestry.… … Universalium
cystic fibrosis — [[t]sɪ̱stɪk faɪbro͟ʊsɪs[/t]] N UNCOUNT Cystic fibrosis is a serious disease of the glands which usually affects children and can make breathing difficult … English dictionary
cystic fibrosis — fibrocystic disease of the pancreas; = mucoviscidosis a hereditary disease affecting cells of the exocrine glands (including mucus secreting glands, sweat glands, and others). The faulty gene responsible for the most common form of the disease… … The new mediacal dictionary
cystic fibrosis — cystic fi|bro|sis [ˌsıstık faıˈbrəusıs US ˈbrou ] n [U] [Date: 1900 2000; Origin: fibrosis increase of fiber in a part of the body 1800 1900 Modern Latin, from Latin fibra; FIBER] a serious medical condition, especially in children, in which… … Dictionary of contemporary English
cystic fibrosis — noun the most common congenital disease; the child s lungs and intestines and pancreas become clogged with thick mucus; caused by defect in a single gene; no cure is known • Syn: ↑CF, ↑fibrocystic disease of the pancreas, ↑pancreatic fibrosis,… … Useful english dictionary