原发性是相对于继发性和转移性而言的。就是说，某种疾病最先发生于某个组织或者器官，对于该组织或者器官来说，该疾病就是原发的。举一例：原发性肝细胞癌，就是肝细胞首先出现癌变，而继发性肝癌，则是其他部位的癌症，随血流或者淋巴途径，转移到肝脏，原发部位在其他组织或者器官，而不是肝脏。
原发性 primary ; constitutional ; Idiopathic ; intrinsic
原发性高血压 [内科] Essential hypertension ; [内科] Primary hypertension ; EH ; hypertension
原发性震颤 ET ; essentialtrem
原发性肝癌 primary carcinoma of the liver ; primary liver cancer ; HCC ; PHC
原发性胆汁性肝硬化 PBC ; primrybilirycirrhosis ; primary bilary cirrhorb
原发性硬化性胆管炎 PSC ; primary sclerosing cholangitis ; primary sclerosing cholangitis,PSC
原发性肝细胞癌 HCC ; primary hepatocellular carcinoma ; Hepatocellular carcinoma ; primary liver carcinoma
原发性肺动脉高压 Primary Pulmonary Hypertension ; Primary Pulmonary Arterial Hypertension ; PPH ; Idiopathic pulmonary arterial hypertension
原发性开角型青光眼 POAG ; primary open-angle glaucoma ; primary open angle glaucoma ; primary open angleucom
原发性闭角型青光眼 primary angle-closure glaucoma ; PACG ; primary close-angle alaucoma ; Primary acute angle-closure glaucoma
Methods: The blood pressure of 89 clinic patients with essential hypertension was measured stochastically.
方法：对门诊就诊的89例原发性高血压患者随测血压。
参考来源 - 门诊高血压患者血压控制状况分析—《中国当代医药》—2009年第9期—龙源期刊网Conclusion:The existence of sleep disorders and nocturnal hypoxia events in patients with idiopathic epilepsy.
结论:原发性癫痫患者常伴有睡眠呼吸障碍及夜间低氧事件。
参考来源 - 90例原发性癫痫患者睡眠呼吸障碍及其相关事件分析·2,447,543篇论文数据，部分数据来源于NoteExpress
这些病人曾因原发性癌症做过手术，但是又有了继发性肿瘤迹象。
These patients had been operated on for the primary cancer but there was evidence of secondary tumours.
疱疹样溃疡类似于原发性齿龈口炎。
The herpetiform ulceration resembles primary herpetic gingivostomatitis.
目的是分析原发性小血管炎的临床表现和病理特点。
The objective was to analyze the clinical and pathological characteristics of primary small-vessel vasculitides.
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