- Chronic mountain sickness
Chronic mountain sickness Classification and external resources ICD-10 T70.2 ICD-9 E902.0 DiseasesDB 29615
Chronic mountain sickness (CMS) is a disease that can develop during extended time living at altitude. It is also known as 'Monge’s disease' , after its first description in 1925 by Carlos Monge. While acute mountain sickness is experienced shortly after ascent to high altitude, chronic mountain sickness may develop after many years of living at high altitude. In medicine, high altitude is defined as over 2500 metres, but most cases of CMS occur at over 3000 m.
CMS is characterised by polycythemia (increased hematocrit) and hypoxemia which both decrease on descent from altitude. CMS is believed to arise because of an excessive production of red blood cells, which increases the oxygen carrying capacity of the blood  but may cause increased blood viscosity and uneven blood flow through the lungs (V/Q mismatch). However, CMS is also considered an adaptation of pulmonary and heart disease to life under chronic hypoxia at altitude.
The most frequent symptoms and signs of CMS are headache, dizziness, tinnitus, breathlessness, palpitations, sleep disturbance, fatigue, anorexia, mental confusion, cyanosis, and dilation of veins.
Treatment involves descent from altitude, where the symptoms will diminish and the hematocrit return to normal slowly. Acute treatment at altitude involves bleeding (phlebotomy), removal of circulating blood, to reduce the hematocrit; however this is not ideal for extended periods.
- ^ Monge CC, Whittembury J. Chronic mountain sickness. Johns Hopkins Med J. 1976 Dec;139 SUPPL:87-9. PMID 1011412
- ^ Online calculator explaining blood oxygen content
- ^ Zubieta-Castillo G Sr, Zubieta-Calleja GR Jr, Zubieta-Calleja L. Chronic mountain sickness: the reaction of physical disorders to chronic hypoxia. J Physiol Pharmacol. 2006 Sep;57 Suppl 4:431-42.
- ^ Wu TY. Chronic mountain sickness on the Qinghai-Tibetan plateau. Chin Med J (Engl). 2005 Jan 20;118(2):161-8. PMID 15667803
- ^ Chinese Medical Association for High Altitude Medicine. Recommendation for the classification and diagnostic criteria of high altitude disease in China. Chin High Alt Med J (Chin) 1996;6:2-5.
Consequences of external causes (T66–T78, 990–995) Temperature/radiationreduced temperature: Hypothermia · Immersion foot syndromes (Trench foot • Tropical immersion foot • Warm water immersion foot) · Chilblains · Frostbite · Cold intolerance • Acrocyanosis • Erythrocyanosis crurumradiation: Radiation poisoning · Radiation burn · Chronic radiation keratosis • Eosinophilic, polymorphic, and pruritic eruption associated with radiotherapy • Radiation acne • Radiation cancer • Radiation recall reaction • Radiation-induced erythema multiforme • Radiation-induced hypertrophic scar • Radiation-induced keloid • Radiation-induced morphea Air Food Maltreatment Emesis Adverse effect Other Ungrouped
physical factorsDermatosis neglecta • Pinch mark • Pseudoverrucous papules and nodules • Sclerosing lymphangiitis • Tropical anhidrotic asthenia • UV-sensitive syndrome
environmental skin conditions: Electrical burn • frictional/traumatic/sports (Black heel and palm • Equestrian perniosis • Jogger's nipple • Pulling boat hands • Runner's rump • Surfer's knots • Tennis toe • Vibration white finger • Weathering nodule of ear • Wrestler's ear • Coral cut • Painful fat herniation ) • Uranium dermatosisiv use (Skin pop scar • Skin track • Slap mark • Pseudoacanthosis nigricans • Narcotic dermopathy)
Wikimedia Foundation. 2010.
Look at other dictionaries:
chronic mountain sickness — mountain sickness characterized by loss of tolerance to hypoxia in a previously acclimatized person, with secondary polycythemia. It occurs in two types: an emphysematous type in which dyspnea is the dominant symptom and bronchitis, laryngitis,… … Medical dictionary
Mountain sickness — can refer to: Altitude sickness or acute mountain sickness, a pathological condition that is caused by acute exposure to low air pressure Chronic mountain sickness, a disease that can develop during extended time living at altitude This… … Wikipedia
Mountain sickness — Also known as altitude sickness or altitude illness, this is a disorder caused by being at high altitude, commonly above 8,000 feet (2,440 meters). The cause of altitude illness is a matter of oxygen physiology. At sea level the concentration of… … Medical dictionary
subacute mountain sickness — a type of mountain sickness that is milder than the chronic form and similar clinically to the acute form except for being persistent and amenable to cure by a descent in altitude … Medical dictionary
sickness — SYN: disease (1). acute African sleeping s. SYN: Rhodesian trypanosomiasis. aerial s. SYN: altitude s.. African sleeping s. Gambian trypanosomiasis, Rhodesian trypanosomiasis. air s. a form of motion s. caused by flying in an airplane. altitude s … Medical dictionary
sickness — noun 1 state of being ill ADJECTIVE ▪ chronic ▪ long, long term (esp. BrE) ▪ The policy includes long term sickness cover. VERB + SICKNESS ▪ … Collocations dictionary
Altitude sickness — Infobox Disease Name = Altitude sickness Caption = DiseasesDB = 8375 DiseasesDB mult = DiseasesDB2|29615 ICD10 = ICD10|T|70|2|t|66 ICD9 = ICD9|E902.0 ICDO = OMIM = MedlinePlus = eMedicineSubj = med eMedicineTopic = 3225 MeshID = D000532 Altitude… … Wikipedia
Motion sickness — For the album by Bright Eyes, see Motion Sickness. Motion sickness Classification and external resources ICD 10 T75.3 ICD 9 … Wikipedia
Decompression sickness — Caisson disease [decompression sickness] Classification and external resources Two United States Navy sailors prepare for training inside a decompression chamber … Wikipedia
Andes disease — chronic mountain sickness … Medical dictionary