Massive juvenile polyposis of the stomach in a family with SMAD4 gene mutation

Maurizio Ponz de Leon, Monica Pedroni, Alessandra Viel, Claudio Luppi, Rita Conigliaro, Federica Domati, Giuseppina Rossi, Luca Reggiani Bonetti

Research output: Contribution to journalArticle

Abstract

Relatively little is known on the genotype-phenotype correlations between SMAD4 gene mutations, juvenile polyposis of the intestine and Hereditary Hemorrhagic Teleangectasia. We describe a family in which the proband (a 46-year old woman) had massive polyposis of the stomach—leading to surgery—with high-grade dysplasia at histology. Molecular analysis was carried out using Next Generation sequencing techniques with Miseq Illumina Platforms and a minimal coverage of 40 reads. In the proband, the analysis showed the presence of a truncating mutation in the SMAD4 gene (c.1213dupC, a variant previously associated with juvenile polyposis and Hereditary Hemorrhagic Teleangectasia). The same mutation was detected in two other members of the family (father and brother of the proband), who showed massive polypoid involvement of the stomach at gastroscopy. By taking the family history, subtle evidence of Hereditary Teleangectasia was found (nasal bleeding and arterovenous malformations) in the three gene carriers. Colonoscopy showed polyp occurrence in all three affected members with SMAD4 mutation, with prevalence of adenomatous lesions in one (father), of hamartomas in the brother, and of a mix of histological types in the proband. The main features of the family can be summarized as follows: (A) In hereditary juvenile polyposis, lesions of different histology can be detected at colonoscopy; (B) In the gene carriers of SMAD4 mutations, lesions of the stomach require careful surveillance and, when necessary, surgical interventions; (C) Signs and symptoms of Hereditary Hemorrhagic Teleangectasia should be suspected (and searched) in individuals with SMAD4 constitutional mutations.

Original languageEnglish
JournalFamilial Cancer
DOIs
Publication statusAccepted/In press - Jan 1 2018

Fingerprint

Mutation
Genes
Colonoscopy
Fathers
Siblings
Stomach
Histology
Gastroscopy
Epistaxis
Hamartoma
Genetic Association Studies
Polyps
Signs and Symptoms
Intestines
Juvenile polyposis syndrome

Keywords

  • Cancer
  • Colon
  • Hamartoma
  • Polyps
  • Rectum
  • SMAD4
  • Tumour

ASJC Scopus subject areas

  • Genetics
  • Oncology
  • Genetics(clinical)
  • Cancer Research

Cite this

de Leon, M. P., Pedroni, M., Viel, A., Luppi, C., Conigliaro, R., Domati, F., ... Bonetti, L. R. (Accepted/In press). Massive juvenile polyposis of the stomach in a family with SMAD4 gene mutation. Familial Cancer. https://doi.org/10.1007/s10689-018-0100-8

Massive juvenile polyposis of the stomach in a family with SMAD4 gene mutation. / de Leon, Maurizio Ponz; Pedroni, Monica; Viel, Alessandra; Luppi, Claudio; Conigliaro, Rita; Domati, Federica; Rossi, Giuseppina; Bonetti, Luca Reggiani.

In: Familial Cancer, 01.01.2018.

Research output: Contribution to journalArticle

de Leon, MP, Pedroni, M, Viel, A, Luppi, C, Conigliaro, R, Domati, F, Rossi, G & Bonetti, LR 2018, 'Massive juvenile polyposis of the stomach in a family with SMAD4 gene mutation', Familial Cancer. https://doi.org/10.1007/s10689-018-0100-8
de Leon, Maurizio Ponz ; Pedroni, Monica ; Viel, Alessandra ; Luppi, Claudio ; Conigliaro, Rita ; Domati, Federica ; Rossi, Giuseppina ; Bonetti, Luca Reggiani. / Massive juvenile polyposis of the stomach in a family with SMAD4 gene mutation. In: Familial Cancer. 2018.
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