Prenatal diagnosis of mesoblastic nephroma: A case report

When an abdominal mass is demonstrated on prenatal ultrasonography, the differential diagnosis includes adrenal tumors, ovarian cysts, bowel obstruction, and renal tumors. A 34-year-old pregnant women was referred to our hospital evaluation of a fetal abdominal mass in the left renal fossa. A solid, round, mass on left renal area was noted; the adrenal gland was visualized on the same side. Thus, we suspected an abdominal tumor of renal origin. After birth, a 6.6×4.4 cm round mass replacing the left kidney was demonstrated on ultrasonography and computed tomography. The neonate underwent a left nephrectomy at 9 days of life and confirmed a mesoblastic nephroma. The neonate was well discharged 11 days post-operatively. We report the case with a brief review of the literature.