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Table 1 Causes of non-immunological hydrops fetalis and their relative frequency [17]

From: Lysosomal storage disorder in non-immunological hydrops fetalis (NIHF) - more common than assumed? Report of four cases with transient NIHF and a review of the literature

Category Relative frequency%
cardiovascular 21.7
hematologic 10.4
infections 6.7
thoracic 6
lymphatic dysplasia 5.7
placental 5.6
syndromic 4.4
miscellaneous 3.7
urinary tract malformation 2.3
inborn errors of metabolism 1.1
extrathoracic 0.7
gastrointestinal 0.5
idiopathic 17.8