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marasmus
Marasmus is a form of severe malnutrition characterized by energy deficiency. A child with marasmus looks emaciated. Body weight is reduced to less than 60% of the normal (expected) body weight for the age.〔Appleton & Vanbergen, Metabolism and Nutrition, Medicine Crash Course 4th ed. Moseby (London: 2013) p.130〕 Marasmus occurrence increases prior to age 1, whereas kwashiorkor occurrence increases after 18 months. It can be distinguished from kwashiorkor in that kwashiorkor is protein deficiency with adequate energy intake whereas marasmus is inadequate energy intake in all forms, including protein. Protein wasting in kwashiorkor may lead to edema.
The prognosis is better than it is for kwashiorkor but half of severely malnourished children die due to unavailability of adequate treatment.
The word “marasmus” comes from the Greek μαρασμός ''marasmos'' ("decay").
==Signs and symptoms==
Marasmus is commonly represented by a shrunken, wasted appearance, loss of muscle mass and subcutaneous fat mass. Buttocks and upper limb muscle groups are usually more affected than others. Marasmus is not always linked to severe edema. Other symptoms of marasmus include unusual body temperature (hypothermia, pyrexia), anemia, edema, dehydration (as characterized with consistent thirst and shrunken eyes), hypovolemic shock (weak radial pulse, cold extremities, decreased consciousness), tachypnea (pneumonia, heart failure), abdominal manifestations (distension, decreased or metallic bowel sounds, large or small liver, blood or mucus in the stools), ocular manifestations (corneal lesions associated with vitamin A deficiency), dermal manifestations (evidence of infection, purpura, and ear, nose, and throat symptoms (otitis, rhinitis).
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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