Congenital ascites as a presenting sign of lysosomal storage disease.

Neonatal ascites is usually attributed to hematologic, genitourinary, gastrointestinal tract, or congenital heart disease. When these lesions have been excluded, metabolic storage disorders should be considered in the differential diagnosis. We report eight cases of neonatal ascites associated with different types of lysosomal storage disease: infantile sialidosis, Salla disease, GM1 gangliosidosis, and Gaucher disease. In each case there was a history of sibling of perinatal death resulting from the disease. In three cases the diagnosis of ascites was made in utero by ultrasound examination. These diseases are characterized by excretion in the fetal urine of abnormal catabolic products or by measurement of decreased activity of specific lysosomal hydrolases in cultured amniocytes. Thin-layer chromatography of the oligosaccharides in amniotic fluid may be indicated when a diagnosis of persistent fetal ascites has been established.