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. 2004 Feb;12(2):87-92.
doi: 10.1038/sj.ejhg.5201044.

Prevalence of lysosomal storage diseases in Portugal

Rui Pinto  1 , Carla Caseiro, Manuela Lemos, Lurdes Lopes, Augusta Fontes, Helena Ribeiro, Eugénia Pinto, Elisabete Silva, Sónia Rocha, Ana Marcão, Isaura Ribeiro, Lúcia Lacerda, Gil Ribeiro, Olga Amaral, M C Sá Miranda
Affiliations

Prevalence of lysosomal storage diseases in Portugal

Rui Pinto et al. Eur J Hum Genet. 2004 Feb.

Abstract

Lysosomal storage diseases (LSDs) are a group of inherited metabolic disorders individually considered as rare, and few data on its prevalence has been reported in the literature. The overall birth prevalence of the 29 different LSDs studied in the Portuguese population was calculated to be 25/100000 live births, twice the prevalence previously described in Australia and in The Netherlands. The comparison of the prevalence profile of the LSDs presenting a prevalence higher than 0.5/100000 in the Portuguese, Dutch and Australian populations showed, in the Portuguese, the existence of a higher prevalence of GM2 gangliosidoses (B variant), mucolipidoses (II and III), Niemman-Pick type C and metachromatic leukodystrophy (MLD), and a lower prevalence of Pompe and Fabry. The highest prevalence value for a single LSD is the one of GM2 gangliosidoses (B variant), corresponding to 3/100000, a value which is significantly higher than the prevalence of the most frequent LSD in Dutch, Pompe disease (2/100000) and Australians, Gaucher's disease (GD) (1.8/100000). It is worth noting that the highest prevalence of GM2 gangliosidoses found in the Portuguese is mainly due to the existence of a unique subtype, the rare juvenile B1 variant.

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