Renal immature teratoma: A rare entity; A case report and literature review

Abstract

Teratomas are neoplasms commonly arising from the gonads. Kidney is one of the rare sites of origin of the tumor. Immature intra renal teratoma is even more rare and to date only 4 cases have been reported in the literature. We report a rare case of renal immature teratoma diagnosed in a 6 months old female patient, discuss its pathology and review relevant literature.

Renal teratoma: Literature review and case report

“…Renal teratomas are rare, with few cases published in the literature, and 30 cases have been described so far. 3 , 4 For a tumor to be considered renal teratoma, Beckwith suggested that at least two criteria must be present: first, the neoplasm must be unequivocally of renal origin. For this, the entire lesion must be inside the renal capsule and the hypothesis of metastasis must be ruled out; second, the tumor must have elements from other germinal leaflets that clearly try to form other organs.…”

“…Small round and blue cell tumor including teratoid Wilm's, metanephric adenoma, lymphoma, peripheral neuroectodermal tumor and rhabdomyosarcoma are possible and the correct histological diagnoses is crucial for the treatment and prognosis. 4 , 5 …”

“…The migration capacity of the germ cells provides a plausible explanation for the occurrence of teratoma in several anatomical site. 1 , 2 , 3 , 4 …”