| Perlman syndrome is characterized principally by polyhydramnios, neonatal macrosomia, bilateral renal tumors (hamartomas with or without nephroblastomatosis), hypertrophy of the islets of Langerhans and facial dysmorphism. The facial dysmorphism is considered as characteristic with upsweeping anterior scalp hair, a depressed nasal bridge, hypotonic appearance with an open mouth, a prominent everted upper lip and mild micrognathia. Hyperinsulinism appears to be an important feature of this disease and may be a preventable cause of death. The syndrome appears to be inherited in an autosomal recessive manner. There is evidence the syndrome is caused by homozygous or compound heterozygous mutation in the DIS3L2 gene on chromosome 2q37. |
