Multinodular hyperplastic pannephric nephroblastomatosis with tubular differentiation: A new morphologic variant

Jacinto J. Regalado, Maria M. Rodriguez, J. Bruce Beckwith

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We report a case of bilateral nephromegaly delected prenatally with oligohydramnios. Delivered at 35 weeks, this black male infant rapidly developed renal failure, requiring dialysis. He lived 3 1/2 months. The kidneys were three times normal size and diffusely multinodular, with hypoplastic calyces, no corticomedullary demarcation, and no pyramids. Histologically, they revealed hyperplastic embryonal rests composed of tubules and ducts with prominent branching. The nodular rests were intermixed with areas of mature parenchyma, which showed prominent oxalosis. By flow cytometry, rests were diploid, with an S-phase fraction of 25.9%. The proliferation ofembryonal collecting system analogs is attributed to excessively rapid and prolonged branching of the ureteric bud, dating from the fourth gestational month or earlier. This unique case may represent a new morphologic variant of universal nephroblastomatosis.

Original languageEnglish (US)
Pages (from-to)961-972
Number of pages12
JournalFetal and Pediatric Pathology
Volume16
Issue number6
DOIs
StatePublished - Dec 1 1996

Keywords

  • nephroblastomatosis
  • nephrogenic rest
  • nephromegaly
  • oligohydramnios
  • oxalosis
  • renal dialysis

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Pediatrics, Perinatology, and Child Health

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