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罕有病 Rare Diseases

簡介 Introduction

「罕見疾病」(「罕病」)泛指患病率極低、人數極少的疾病,而「孤兒藥」   是指一些藥用產品用於診斷、防預、治療危及生命或十分嚴重的罕見疾病。目前全球已知的罕見疾病約 6,000 多種。不少罕病是由基因突變或遺傳的基因缺陷導致,患者於幼年時,甚至於嬰孩時發病,絕大部分罕病都會對患者的健康構成嚴重及長期的威脅,部份甚至會致殘及致命 (香港01, 2017) 。 根據世界衛生組織的標準,每 1 萬人中只有 6.5-10 個個案的疾病,便定為罕病;美國以每 1 萬人少於 7 個個案,定為罕病;歐盟以每 1 萬人少於 5 個個案,定為罕病;台灣以每 1 萬人少於 1 個個案,定為罕病 (Shafie, 2016) 。 香港每年均有罕病新增個案,較多人認識的罕見病類包括:黏多醣症、龐貝氏症、小兒神經系統皮膚及關節綜合炎症、馬凡氏綜合症、結節性硬化症、骨髓纖維化、小腦萎縮症、肌肉萎縮症、法布瑞氏症、高球氏症、先天性代謝缺陷、線粒體疾病等,部份屬基因遺傳病,個案數目雖然不多,但對患者構成嚴重健康威脅,並給照顧者帶來沉重負擔 (Lee, 2017) 。 香港擁有國際認可的公共衛生政策,以及高質素的醫療系統,然而對於罕病的防治及保障,卻遠遠落後於歐美及亞洲鄰近地區。香港政府現時未為罕病訂立清晰定義,亦未制訂相關醫療及支援政策 (張超雄 , 2017) 。社會大眾甚至部份醫護人員及社會工作者,對罕病的認知亦非常缺乏 (am730, 2017) 。有關討論包括罕有病的政策及醫療發展、罕有病病人及家人的需要、優生學及安樂死的討 論 (Grue, 2010) 。
Rare disease refers to an uncommon disease with a very low prevalence and affects fewer people in the population. Orphan medicinal products has been developed specifically for diagnosis, prevention and treatment for life-threatening or debilitating rare diseases. Currently, there are more than 6,000 rare diseases known worldwide. Numerous of rare disease onset on toddler age and cause fatal and long-term threats to their health due to genetic mutations or defects (香港01, 2017). According to the standard of the World Health Organization, rare disease is classified when it affects 6.5-10 in 10,000 of the general population. In United States, less than 7 in 10,000 in the population. As defined by the European Union, one that affects less than 5 in 10,000 in the population is defined as a rare disease where in Taiwan, those which only affects less than 1 in 10,000 fits its classification (Shafie, 2016) .   In Hong Kong, the number of rare diseases patients increases every year. These members suffers from mucopolysaccharidosis, Pompe disease, Chronic Infantile Cutaneous and Articular Syndrome, Marfan syndrome, tuberous sclerosis, Myelofibrosis, Spinocerebellar Atrophy, muscular atrophy, Fabry disease, Gaucher's disease, inborn error of metabolism, mitochondrial disease and etc.  Some of them are rare genetic diseases which cause serious health threats to patients and create a burden to their caregivers (Lee, 2017).  Health policy and system in Hong Kong are internationally recognized but its prevention and cure for rare diseases is far behind many countries in Occident and Asia. The Hong Kong government has not yet established the definition and recognition of rare disease as well as its medical support policy ( 張超雄 , 2017). For medical professionals, social worker and general public, they are unfamiliar with rare diseases (am730, 2017). Discussion on rare disease includes development of rare disease policy and medical support, needs of rare disease patients and their family as well as controversy over eugenics and euthanasia (Grue, 2010) .

作者/Author: Carmen K.M. Yau


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