Incidence of hereditary amyloidosis and autoinflammatory diseases in Sweden: endemic and imported diseases

BMC Medical Genetics

Kristina Sundquist²  Jan Sundquist²  Asta Försti¹  Xinjun Li¹  Kari Hemminki¹ 

[1] Center for Primary Health Care Research, Lund University/Region Skåne, Malmö, Sweden;Stanford Prevention Research Center, Stanford University School of Medicine, Stanford, CA, USA

关键词: Mutation;    Periodic fever syndrome;    Heritable amyloidosis;    Hospitalization;   

Others  :  1122654
DOI  :  10.1186/1471-2350-14-88

 received in 2013-01-17, accepted in 2013-08-26,  发布年份 2013

【 摘 要 】

Background

Amyloidoses are a heterogeneous group of progressive diseases caused by tissue deposition of misfolded proteins. According to the International Classification of Diseases, hereditary amyloidosis is divided into neuropathic and non-neuropathic forms. In Sweden, neuropathic heredofamilial amyloidosis has been identified as familial amyloidotic polyneuropathy (FAP), a fatal disease that is treated by liver transplantation. The non-neuropathic form includes familial autoinflammatory diseases. As no incidence data on these hereditary diseases are available and as even diagnostic data on non-neuropathic forms are lacking we determined the incidence of these diseases and characterized non-neuropathic conditions.

Methods

Patients were identified using data from the Swedish Hospital Discharge Register and from the Outpatient Register for 2001 through 2008. All patients discharged with hereditary amyloidosis diagnoses were included and standardized incidence rates were calculated.

Results

Non-neuropathic disease was diagnosed in 210 patients, with an incidence of 2.83 per million. FAP was diagnosed in 221 patients, with an incidence of 2.02 per million. Two northern provinces that are home to 5% of the Swedish population accounted for 77% of FAP cases; the incidence in one of them, West Bothnia, was 100 times that in the rest of Sweden. Approximately 98% of non-neuropathic disease patients were immigrants, most of whom were from the Eastern Mediterranean area. Young Syrian descendants had the highest incidence rate, which was over 500-fold higher than that in individuals with Swedish parents. Even the early onset of these conditions identified them as familial autoinflammatory diseases.

Conclusions

FAP cases were highly concentrated in the two northernmost provinces. Non-neuropathic familial autoinflammatory diseases were of early-onset and immigrant origin most likely related to periodic fever syndromes. Paradoxically, FAP has remained endemic, in spite of population movements within the country, while familial autoinflammatory diseases, with an incidence exceeding that of FAP, were brought into the country as a result of immigration mainly from the Eastern Mediterranean area.

【 授权许可】

   
2013 Hemminki et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

Figure 2.

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