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Renal-hepatic-pancreatic dysplasia: a syndrome reconsidered
Insights
This study details renal, hepatic, and pancreatic dysplasia in infants, a rare condition affecting multiple organs. These findings highlight the complex interplay of genetic and developmental factors in severe congenital malformations.
Area of Science:
- Pediatric Pathology
- Developmental Biology
- Medical Genetics
Background:
- Ivemark syndrome, characterized by renal, hepatic, and pancreatic dysplasia, is a rare congenital disorder.
- Understanding the specific pathological features is crucial for diagnosis and management.
Observation:
- Five infants presented with a combination of cystic renal dysplasia, biliary dysgenesis with ductal abnormalities, and pancreatic fibrosis/cysts.
- Progressive biliary changes were observed in serial liver biopsies, evolving from bile duct paucity to dysgenesis.
- Intrahepatic ductal dilatation, consistent with Caroli disease, was noted in four cases.
Findings:
- The renal malformation included cystic dysplasia with deficient nephron differentiation and glomerular cysts.
- Hepatic abnormalities featured enlarged portal areas with elongated biliary profiles and fibrosis.
- Pancreatic changes involved fibrosis, cysts, and reduced parenchymal tissue.
Implications:
- Clinical manifestations include renal insufficiency, chronic jaundice, and insulin-dependent diabetes mellitus.
- While similar organ abnormalities occur in other syndromes, isolated renal-hepatic-pancreatic dysplasia may not represent a single homogeneous entity.
- Further research is needed to elucidate the etiology and potential therapeutic targets for this complex condition.
Abstract:
Five infants, three dying neonatally and two later in the first year of life, had renal, hepatic, and pancreatic dysplasia, a combination of abnormalities first described by Ivemark et al [1959]. The renal malformation consisted of cystic dysplasia, with abnormally differentiated ducts, deficient nephron differentiation, and glomerular cysts. The hepatic abnormality consisted of enlarged portal areas containing numerous elongated biliary "profiles," with a tendency to perilobular fibrosis. Serial liver biopsies in one child with cholestasis from birth showed a progression from bile duct paucity at 1 1/2 wk to typical biliary "dysgenesis" at 7 mo. Four of the five children had intrahepatic ductal dilatation, diagnosed ante mortem in the two older children as Caroli disease. The pancreatic abnormality consisted of fibrosis and cysts, with a diminution of parenchymal tissue. The clinical and functional reflection of these abnormalities in the two children surviving the newborn period included renal insufficiency, chronic jaundice, and insulin-dependent diabetes mellitus. Similar renal, hepatic, and pancreatic abnormalities occur in other syndromes, including trisomy 9, Meckel syndrome, Jeune, Saldino-Noonan, and Elejalde types of chondrodysplasia, and glutaric aciduria II. After exclusion of identifiable syndromes, the remaining cases of renal-hepatic-pancreatic dysplasia do not necessarily constitute a homogeneous group.