Monarch Disease Ontology entry MONDO_0009965 (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. Also known as: nephroblastomatosis - fetal ascites - macrosomia - Wilms tumor, nephroblastomatosis - foetal ascites - macrosomia - Wilms tumour, nephroblastomatosis, fetal ascites, macrosomia and Wilms tumor, nephroblastomatosis, foetal ascites, macrosomia and Wilms tumour, nephroblastomatosis-fetal ascites-macrosomia-Wilms tumor syndrome, nephroblastomatosis-fetal ascites-macrosomia-Wilms tumour syndrome, renal hamartomas, nephroblastomatosis and fetal gigantism, renal hamartomas, nephroblastomatosis and foetal gigantism.