Abstract Background Congenital mesoblastic nephromas mainly present as asymptomatic abdominal masses. but some present hematuria. hypertension or hypercalcemia. Neonatal dyspnea in an early-birth neonate due to rapid tumor growth is reported here for the first time. https://lecoureures.shop/product-category/ski-de-fond-equipement-skis-enfant-classic/