Congenital intrarenal teratoma arising from a horseshoe kidney

Distinct features of teratoid Wilms tumor

“…Moreover, the clinical and histologic description of this case resembles a previously described stromal tumor (fetal rhabdomyomatous nephroblastoma) [23], but with prominent adipose tissue and osteoid formation. Imaging studies of our patients were similar to those reported in the literature, with areas of fat attenuation and calcification, features that can also be seen in another rare tumor, intrarenal teratoma [24]. Likewise, similar to other reported cases, histology of our cases showed a mixture of mature squamous and mucus-producing columnar epithelium and a prominent component of mature or maturing adipose tissue.…”

A rare case of intrarenal teratoma in a 6-month-old male

“…Teratomas of the kidney are rare tumors. Only 16 cases of intrarenal teratoma in children, including this case have been reported to our knowledge 1–15. Ten cases have been reported in adults.…”

Immature teratoma of kidney in a 5-month-old child

“…12 Wilms' tumor originates from mesodermal metanephrogenic blastema and can consist of both ectodermal and mesodermal tissue giving a similar appearance to a teratoma. 13 To diagnose a renal teratoma, the primary tumor should be unequivocally of renal origin and the tumor should exhibit unequivocal heterotopic organogenesis. 14 In our case, there were no blastemal element and both criteria proposed by Beck with 14 were fulfilled.…”