Report and follow-up on two new patients with congenital mesoblastic nephroma.

"Declarations Ethics approval and consent to participateWritten informed consent was obtained from parents at admission of their newborns. The study was approved by the Mother and Child Department of the University of Palermo, ethics committee Palermo 1 (Palermo, Italy). All procedures performed in this report were in accordance with the ethical standards of the institutional and national research committee, and with the 1964 Helsinki declaration and its later amendments, or comparable ethical standards. Consent for publicationWritten informed consent was obtained from patients’ parents for publication of this case report and accompanying images. Competing interestsThe authors declare that they have no competing interests. Competing interests The authors declare that they have no competing interests."

"Funding No funding was granted for this research."