Duplication cyst of the pylorus--a rare cause of gastric outlet obstruction in the newborn.

Duplication cysts of the pylorus are the rarest of alimentary tract duplications with very few reported cases. We present such a cyst in a neonate presenting with gastric outlet obstruction. We have also reviewed the literature and outlined the theories of origin, modes of presentation, diagnosis and the surgical procedures. Even though several modes of surgery have been described, it is best to individualize the surgical option in each case. The results depend on the nature and site of duplication, complications and the associated anomalies.

Extrarenal Wilms' tumour--a case report and review of literature.

Extra renal Wilm's tumour (EWT) is an exceedingly rare entity and needs to fulfill certain criteria. Of the 48 cases reported, only about 36 have been found to be convincingly proved. We present one more well proven case of EWT and have extensively reviewed the literature. The diagnostic, staging and management guidelines are discussed. Amongst the reported cases, the behaviour of the tumour appears to parallel that of similarly staged "intra renal" Wilm's tumour. Hence the staging and the management protocols of "intra renal" Wilm's tumour can well be applied to tumour of extra renal location albeit with some modifications.