title: Hydramnios associated with congenital mesoblastic nephroma: case report.
abstract: A case is reported of hydramnios due to excessive fetal urine production associated with congenital mesoblastic nephroma. Rapid growth of a right renal tumor and excessive fetal urine production were detected by measuring the size of the tumor and hourly fetal urine production during the development of hydramnios between 28-34 weeks of gestation. A female infant weighing 2200 g was born at 34 weeks' gestation. She lost 18% of her birth weight in the first 48 hours because of neonatal polyuria. Right nephrectomy and ureterectomy were performed 2 days after birth. After the operation, the neonatal polyuria improved dramatically. The right renal tumor was identified histologically as a mesoblastic nephroma. The importance is stressed of early and correct antenatal diagnosis of a renal tumor and precise estimation of urine production for postnatal management of hemodynamic change in cases of mesoblastic nephroma.
authors.affiliation: Department of Obstetrics and Gynecology, Osaka University Medical School, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Ohmichi
authors.forename: K
authors.initials: K
authors.lastname: Tasaka
authors.forename: N
authors.initials: N
authors.lastname: Sugita
authors.forename: S
authors.initials: S
authors.lastname: Kamata
authors.forename: T
authors.initials: T
authors.lastname: Hasegawa
authors.forename: O
authors.initials: O
authors.lastname: Tanizawa
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007680:Kidney Neoplasms / Q000151:congenital*; D006831:Polyhydramnios / Q000209:etiology*; D011247:Pregnancy; D014556:Urine; D009396:Wilms Tumor / Q000151:congenital*