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Hypertriglyceridemia | |
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Triglyceride, which cause hypertriglyceridemia at high level
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Classification and external resources | |
Specialty | endocrinology |
ICD-10 | E78.1, E78.2, E78.3 |
ICD-9-CM | 272.1 |
OMIM | 145750 |
DiseasesDB | 6372 |
MedlinePlus | 000397 |
eMedicine | med/2921 article/126568 |
MeSH | D015228 |
Hypertriglyceridemia denotes high (hyper-) blood levels (-emia) of triglycerides, the most abundant fatty molecule in most organisms. Elevated levels of triglycerides are associated with atherosclerosis, even in the absence of hypercholesterolemia (high cholesterol levels), and predispose to cardiovascular disease. Very high triglyceride levels also increase the risk of acute pancreatitis. Hypertriglyceridemia itself is usually symptomless, although high levels may be associated with skin lesions known as xanthomas.[1]
The diagnosis is made on blood tests, often performed as part of screening. Once diagnosed, other blood tests are usually required to determine whether the raised triglyceride level is caused by other underlying disorders ("secondary hypertriglyceridemia") or whether no such underlying cause exists ("primary hypertriglyceridaemia"). There is a hereditary predisposition to both primary and secondary hypertriglyceridemia.[1]
Weight loss and dietary modification may be effective in hypertriglyceridemia. The decision to treat hypertriglyceridemia with medication depends on the levels and on the presence of other risk factors for cardiovascular disease. Very high levels that would increase the risk of pancreatitis is treated with a drug from the fibrate class. Niacin and omega-3 fatty acids as well as drugs from the statin class may be used in conjunction, with statins being the main drug treatment for moderate hypertriglyceridemia where reduction of cardiovascular risk is required.[1]
Most people with elevated triglycerides experience no symptoms. Some forms of primary hypertriglyceridemia can lead to specific symptoms: both familial chylomicronemia and primary mixed hyperlipidemia include skin symptoms (eruptive xanthoma), eye abnormalities (lipemia retinalis), hepatosplenomegaly (enlargement of the liver and spleen), and neurological symptoms. Some experience attacks of abdominal pain that may be mild episodes of pancreatitis. Eruptive xanthomas are 2–5 mm papules, often with a red ring around them, that occur in clusters on the skin of the trunk, buttocks and extremities.[2] Familial dysbetalipoproteinemia causes larger, tuberous xanthomas; these are red or orange and occur on the elbows and knees. Palmar crease xanthomas may also occur.[1][2]
The diagnosis is made on blood tests, often performed as part of screening. Once diagnosed, other blood tests are usually required to determine whether the raised triglyceride level is caused by other underlying disorders ("secondary hypertriglyceridemia") or whether no such underlying cause exists ("primary hypertriglyceridaemia"). There is a hereditary predisposition to both primary and secondary hypertriglyceridemia.[1]
Acute pancreatitis occurs in people whose triglyceride levels are above 1000 mg/dl (11.3 mmol/l).[1][2][3] Hypertriglyceridemia is associated with 1–4% of all cases of pancreatitis. The symptoms are similar to pancreatitis secondary to other causes, although the presence of xanthomas or risk factors for hypertriglyceridemia may offer clues.[3]
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Weight loss and dietary modification may be effective in hypertriglyceridemia. The decision to treat hypertriglyceridemia with medication depends on the levels and on the presence of other risk factors for cardiovascular disease. Very high levels that would increase the risk of pancreatitis is treated with a drug from the fibrate class. Niacin and omega-3 fatty acids as well as drugs from the statin class may be used in conjunction, with statins being the main drug treatment for moderate hypertriglyceridemia where reduction of cardiovascular risk is required.[1]
For people with mildly or moderately high levels of triglycerides lifestyle changes are recommended.[1] This may include restriction of carbohydrates and fat in the diet. Medications are recommended in those with high levels of triglycerides, with fibrates being recommended first.[1]
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リンク元 | 「脂質異常症」「高中性脂肪血症」「高トリグリセリド血症」「hypertriglyceridemic」「hypertriglyceridaemic」 |
拡張検索 | 「familial hypertriglyceridemia」 |
関連記事 | 「hypertriglyceridemias」 |
型分類 | 増加するリポ蛋白 | 血清脂質の変動 | コレステロール (mg/dl) |
トリグリセリド (mg/dl) | ||
正常 | - | - | <220 | <150 | ||
I型高脂血症 | 高カイロミクロン血症 | hyperchylomicronemia | カイロミクロン | 中性脂肪著明増加 | <260 | >1000 |
IIa型高脂血症 | 高コレステロール血症 | hypercholesterolemia | LDL | コレステロール増加 | >220 | >150 |
IIb型高脂血症 | 複合型高脂血症 | combined hyperlipidemia | LDL, VLDL | コレステロールと中性脂肪増加 | >220 | 150-300 |
III型高脂血症 | 異常βリポ蛋白血症 | dysbetalipoproteinemia | IDL | 電気泳動でbroad β | 350-500 | 350-500 |
IV型高脂血症 | 高トリグリセリド血症 | hypertriglyceridemia | VLDL | 中性脂肪増加 | <240 | 200-1000 |
V型高脂血症 | 複合型高トリグリセリド血症 | mixed hypertriglyceridemia | カイロミクロン, VLDL | 中性脂肪著明増加 | <300 | >1000 |
I型 | II型 | III型 | IV型 | V型 | |||
IIa型 | IIb型 | ||||||
高カイロミクロン血症 | 高コレステロール血症 | 複合型高脂血症 | 異常βリポ蛋白血症 | 高トリグリセリド血症 | 複合型高トリグリセリド血症 | ||
増加リポ蛋白 | CM | ++ | + | ||||
VLDL | + | + | + | ||||
IDL | + | ||||||
LDL | + | + | |||||
血漿脂質 | TC | + | +++ | ++ | ++ | /+ | + |
TG | +++ | ++ | ++ | ++ | +++ | ||
TC/TG | <0.2 | >1.6 | 不定 | ≒ | 0.6-1.6 | <0.6 | |
病因 | ・LPL欠損 ・アポCII欠損 (外因性高脂血症) |
LDL受容体異常 | 不明 | アポE異常 (E2/E2など) |
不明 (内因性高脂血症) |
LPL欠損へテロ(一部) (外因性高脂血症 and (内因性混合型高脂血症) | |
臨床所見 | 発症時期 | 小児期 | 小児期~成人 | 成人 | 成人 | 小児期~成人 | |
肝脾肥大 |
+++ | - | + | +++ 脾のみ |
+++ | ||
腹痛 | + | + | + | ||||
膵炎 | + | + | |||||
網膜脂血症 | + | + | |||||
肥満 | + | + | |||||
角膜輪 | + | + | |||||
冠動脈疾患 | まれ | 最も高率 | 高率 | 中程度 | 比較的まれ | ||
黄色腫 | 発疹状 | 黄色板状 結節状 腱黄色腫 |
手掌線 結節状 発疹状 |
発疹状 | |||
耐糖能 | 正常 | 正常 | 正常 | 異常多い | 異常多い | ||
高尿酸血症 | なし | なし | 少ない | 多い | 多い | ||
遺伝 | 劣性遺伝 | 優性遺伝 | 劣性遺伝 | 優性遺伝 | 不明 | ||
頻度 | まれ | 多い 500人中 1人(ヘテロ) 100万人中 1人(ホモ) |
多い 200人中 1人 |
少ない 1万人中 2-3人 |
最も多い | まれ | |
血清静置試験 | 上層:乳濁 | 透明 | わずかに混濁 | 混濁、 時にミルク状 |
混濁 | 上層:乳濁 | |
下層:透明 | 下層:混濁 | ||||||
特徴 | small dense LDL の存在 |
broad β |
血清TG | 血清TC | ||
内分泌代謝疾患 | 甲状腺機能低下症 | +++ | |
クッシング症候群 | + | ++ | |
先端性肥大症 | + | ||
糖尿病 | +++ | +~++ | |
痛風 | + | ||
神経性食思不振症 | ++ | ||
ウェルナー症候群 | ++ | ||
肝疾患 | 閉塞性肝・胆道疾患 | +++ | |
肝癌 | ++ | ||
腎疾患 | ネフローゼ症候群 | ++ | +++ |
慢性腎不全 | +++ | ||
免疫異常 | 全身性エリテマトーデス | +++ | |
骨髄腫 | ++ | + | |
薬剤など | サイアザイド | + | + |
β遮断薬 | + | ||
シクロスポリン | + | ||
経口避妊薬 | +++ |
治療方針の原則 | カテゴリー | 脂質管理目標値(mg/dL) | |||||
リスク群 | LDL-C以外の主要危険因子 | LDL-C | HDL-C | TG | |||
一次予防 | まず生活習慣の改善を 行った後、薬物治療の 適応を考慮する | I | 低リスク群 | 0 | <160 | ≧40 | <150 |
II | 中リスク群 | 1~2 | <140 | ||||
III | 高リスク群 | 3以上 | <120 | ||||
二次予防 | 生活習慣の改善とともに 薬物治療を考慮する | 冠動脈疾患の既往 | <100 |
高中性脂肪血症 : 約 23,700 件 高トリグリセリド血症 : 約 23,900 件
高トリグリセリド血症の
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