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Investigation of lysosomal storage diseases in nonimmune hydrops fetalis
Maira G Burin1, Ana P Scholz, Rejane Gus
1Medical Genetics Service, Hospital de Clínicas de Porto Alegre, Porto Alegre, RS, Brazil. mburin@hcpa.ufrgs.br
Objective:
To investigate lysosomal storage diseases (LSD) in cases of nonimmune hydrops fetalis (NIHF).
Methods:
Thirty-three cases of NIHF were investigated, 28 in the prenatal period and 5 in hydropic newborns. In addition to a general investigation for NIHF, specific enzymatic analyses for the detection of LSD were performed.
Results:
In our sample, we detected five patients (15%) with LSD, each patient having one of the following diseases: mucolipidosis, Niemann-Pick disease, galactosialidosis, sialidosis and mucopolysaccharidosis type IV A.
Conclusion:
Although LSDs are rare disorders as a group, they should be considered as a possible cause of NIHF, even in the absence of consanguinity or of a previous family history. By excluding the more frequent causes of NIHF, an LSD investigation assists in clarifying the etiology of many hydropic cases, making more appropriate genetic counseling for parents possible.
