Ectopic Immature Renal Tissue Associated with Lipomeningomyelocele and Enteric Duplication Cyst: A Report of Two Cases

Ectopic immature renal tissue (EIRT) is a lesion rarely described in the literature. It shows the components of a nephrogenic rest including the blastema, epithelia, and stroma. We report two cases of EIRT in a 3-year-old female and an 8 months male child, associated with lipomeningomyelocele and an enteric duplication cyst, respectively, along with detailed immunohistochemical profile. Though there are a few cases of EIRT associated with teratoma, only two cases of EIRT associated with lipomeningomyelocele have been described in the English literature. Moreover, extensive literature search did not reveal any previous case report where EIRT had been documented in an enteric duplication cyst.