A rare disease, also referred to as an orphan disease, is any disease that affects a small percentage of the population.

罕见病，也被称为孤儿病，指那些仅在极少数人群身上发生的疾病。

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Pigmented Villonodular Synovitis is a benign orphan disease with trend of local infiltration. Its clinical manifestation is atypical.

色素沉着绒毛结节性滑膜炎是一种良性的，但具有局部浸润倾向的罕见疾病，临床症状不典型。

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This study thoroughly examines the following markets: orphan diseases, Gaucher's Disease and Pulmonary Arterial Hypertension (PAH) markets in Europe.

该项研究通过调查以下市场：孤儿疾病，高歇病和欧洲的肺动脉高压（PAH）市场。

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An estimated 25 million people in the US alone collectively live with some sort of orphan disease.

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One reason to purse the unusual use is it is a so-called orphan disease afflicting only about 65, 000 Americans.

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Cumulatively, these orphan disease afflcit 25 million to 30 million people.

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