THIRD TRIMESTER PRENATAL DIAGNOSIS OF CLASSIC CONGENITAL MESOBLASTIC NEPHROMA

A CASE STUDY

Abstract

INTRODUCTION: Congenital mesoblastic nephroma is the main cause of kidney tumors in the first year of life, often associated with polyhydramnios, preterm birth, and neonatal hypertension. CASE REPORT: In this paper, we report a case of volumetric enlargement of the left kidney with gastric bubble compression in a fetus at 38 weeks and 5 days, suggestive of renal tumor. With the interruption of pregnancy, surgical treatment was performed and a classic variant congenital mesoblastic nephroma was confirmed. DISCUSSION: Despite the difficulty in diagnosis, congenital mesoblastic nephroma can be suspected even in the prenatal period through the identification of a solid, unilateral, encapsulated mass, with homogeneous echogenicity and located in the renal fossa on ultrasound. Usually, the treatment of this type of tumor is surgical and the prognosis is usually good, especially if the tumor is of the classic histological subtype. CONCLUSION: A rare disease that can lead to adverse pregnancy outcomes during pregnancy, it is concluded that congenital mesoblastic nephroma, despite ultrasound suspicion during the prenatal period, is difficult to diagnose and is only confirmed in the postnatal period, with surgery treatment and anatomopathological study.