FGF10 Signaling differences between type I pleuropulmonary blastoma and congenital cystic adenomatoid malformation.

Abstract

BACKGROUND:

Type I pleuropulmonary blastoma (PPB) and congenital cystic adenomatoid malformation of the lung (CCAM) are cystic lung diseases of childhood. Their clinical and radiological presentations are often similar, and pathologic discrimination remains difficult in many cases. As a consequence, type I PPB and CCAM are frequently confused, leading to delayed adequate management for type I PPB. Recent studies have suggested a role for fibroblast growth factor (FGF) 10 signal pathway in CCAM pathogenesis. The objective of our study was to determine whether FGF10 signaling differs between CCAM and type I PPB.

METHODS:

Immunohistochemical studies were performed for expression of FGF10, its receptor FGFR2b, and its inhibitor sonic hedgehog (SHH) in focal type I PPB (n=6), CCAM type I (n=7), CCAM type II (n=7), and control lungs (n=5).

RESULTS:

FGF10, FGFR2b, and SHH expressions differed markedly between type I PPB and both types of CCAM. Type I and type II CCAM cystic walls expressed FGF10, FGFR2b, and SHH, whereas staining was absent or poor in type I PBB cystic walls. Expression of FGF10, FGFR2b, and SHH did not differ between CCAM cystic walls and control airway walls.

CONCLUSIONS:

These findings show that immunohistochemistry with FGF10, FGFR2b, or SHH could be useful in differentiating CCAM from type I PPB, when a child presents with a focal cystic lung lesion. The absence of strong expression of FGF10, FGFR2b, and/or SHH makes the diagnosis of CCAM very doubtful.

• Authors: Guillaume Lezmi, Virginie Verkarre, Naziha Khen-Dunlop, Shamila Vibhushan, Alice Hadchouel, Caroline Rambaud, Marie-Christine Copin, Jean-Luc Rittie, Alexandra Benachi, Jean-Christophe Fournet, Christophe Delacourt
• Journal: Orphanet journal of rare diseases (Orphanet J Rare Dis) Vol. 8 Pg. 130 (Sep 03 2013) ISSN: 1750-1172 [Electronic] England
• PMID: 24004862 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• FGF10 protein, human
• Fibroblast Growth Factor 10
• Hedgehog Proteins
• SHH protein, human
• Receptor, Fibroblast Growth Factor, Type 2

Topics

• Cystic Adenomatoid Malformation of Lung, Congenital (genetics, metabolism)
• Female
• Fibroblast Growth Factor 10 (genetics, metabolism)
• Hedgehog Proteins (genetics, metabolism)
• Humans
• Immunohistochemistry
• Infant
• Infant, Newborn
• Male
• Pulmonary Blastoma (genetics, metabolism)
• Receptor, Fibroblast Growth Factor, Type 2 (genetics, metabolism)