Congenital Mesoblastic Nephroma in a Newborn: Case Report

Abstract

Background: Congenital mesoblastic nephroma (CMN) is a rare mesenchymal renal tumor of the newborn. The objective of this study was to review the clinical particularities, paraclinical and therapeutic characteristics of this tumor. It is about a case report of pediatric patient admitted to a Pediatric Neonatal Reanimation, A. Harouchi Hospital, Ibn Rochd university Hospital centre, Casablanca. Results: We report the observation of a 4-day premature newborn who was hospitalized for exploration of an abdominal mass occupying the right flank since birth. Abdominal ultrasonography revealed a predominantly fleshy right solidocystic renal mass, a site of calcifications laminating the cortex, measuring 57x33x58, with minimal pyelocaliceal dilatation and diffuse infiltration of perrenal fat. The CT scan revealed a kidney increased in size, seat of a voluminous mass rather well limited, of tissue density, heterogeneous, seat of necrosis, realizing a sign of the spur, measuring 40x47x58mm. The diagnosis was confirmed by a kidney biopsy. Conclusion: Mesoblastic nephroma is considered a benign tumor. The diagnosis is discussed on the basis of clinical data, ultrasound and CT scan. Surgery is the primary treatment for NMC and is based on extended nephrectomy. Most patients with NMC have a favorable outcome, the overall prognosis is very good.