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Enea D, Dray X, Guillerm E, Guilloux A, Yver M, Cervera P, Svrcek M. Inflammatory/juvenile-like polyps in neurofibromatosis type 1 associated with epithelial dysplasia. Virchows Arch 2024; 484:865-868. [PMID: 38396165 DOI: 10.1007/s00428-024-03769-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 02/10/2024] [Accepted: 02/13/2024] [Indexed: 02/25/2024]
Abstract
The term "juvenile-like (inflammatory/hyperplastic) mucosal polyps" (JLIHMP) has been recently introduced to describe a spectrum of polypoid lesions in patients with neurofibromatosis type 1 (NF-1). Due to the scarce number of reported cases and histopathological similarities with entities such as sporadic/syndromic juvenile polyps or inflammatory fibroid polyps, this entity remains a subject of debate. We describe herein a case of multiple JLIHMPs in a patient with NF-1, and we document the presence of low-grade dysplasia within one of these polyps.
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Affiliation(s)
- Diana Enea
- Department of Pathology, Saint-Antoine Hospital, AP-HP, Sorbonne Université, Paris, France.
| | - Xavier Dray
- Centre for Digestive Endoscopy, Saint-Antoine Hospital, AP-HP, Sorbonne Université, Paris, France
| | - Erell Guillerm
- Department of Genetics, Pitié-Salpêtrière Hospital, AP-HP, Sorbonne Université, Paris, France
| | - Antoine Guilloux
- Centre for Digestive Endoscopy, Saint-Antoine Hospital, AP-HP, Sorbonne Université, Paris, France
| | - Matthieu Yver
- Department of Pathology, Saint-Antoine Hospital, AP-HP, Sorbonne Université, Paris, France
| | - Pascale Cervera
- Department of Pathology, Saint-Antoine Hospital, AP-HP, Sorbonne Université, Paris, France
| | - Magali Svrcek
- Department of Pathology, Saint-Antoine Hospital, AP-HP, Sorbonne Université, Paris, France
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Kanaan C, Cotteret S, Khneisser P, Soufan R, Bani MA, Burtin P, Sourrouille I, Ducreux M, Al Ghuzlan A, Scoazec JY. NF1-Associated Inflammatory Polyp of the Colon: First Report of a Sporadic Case. Int J Surg Pathol 2022; 30:823-827. [PMID: 35257620 DOI: 10.1177/10668969221085819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
"Juvenile-like (hyperplastic/inflammatory) mucosal polyp" is a term proposed for rare benign mesenchymal lesions of the gastro-intestinal tract so far reported only in patients with type 1 neurofibromatosis (NF1). We report here a first sporadic case of NF1-associated mucosal inflammatory polyp of the colon. The diagnosis was made in a 53-year old female patient with a large polypoid tumor of the cecum. The lesion was predominantly mucosal, made of fibroblast-like cells associated with inflammatory infiltrates rich in eosinophils and containing entrapped, distorted epithelial glands, responsible for the juvenile-like appearance. Whole exome sequencing showed a pathogenic variant of NF1. The patient had no evidence of NF1; no NF1 mutation was detected in normal tissues. Our observation may support the existence of juvenile-like inflammatory polyps associated with NF1 alterations, either germline or somatic. This justifies to test NF1 in difficult-to-classify gastrointestinal mesenchymal tumors.
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Affiliation(s)
- Christina Kanaan
- Gustave Roussy Cancer Campus, Département de Biologie et Pathologie Médicales, Service de Pathologie morphologique, Villejuif, France
| | - Sophie Cotteret
- Gustave Roussy Cancer Campus, Département de Biologie et Pathologie Médicales, Service de Génétique des Tumeurs, Villejuif, France
| | - Pierre Khneisser
- Gustave Roussy Cancer Campus, Département de Biologie et Pathologie Médicales, Service de Pathologie morphologique, Villejuif, France
| | - Ranya Soufan
- Gustave Roussy Cancer Campus, Département de Biologie et Pathologie Médicales, Service de Pathologie morphologique, Villejuif, France
| | - Mohamed-Amine Bani
- Gustave Roussy Cancer Campus, Département de Biologie et Pathologie Médicales, Service de Pathologie morphologique, Villejuif, France
| | - Pascal Burtin
- Gustave Roussy Cancer Campus, Département d'Oncologie médicale, Service d'Oncologie digestive, Villejuif, France
| | - Isabelle Sourrouille
- Gustave Roussy Cancer Campus, Département de Chirurgie, Service de Chirurgie digestive, Villejuif, France
| | - Michel Ducreux
- Gustave Roussy Cancer Campus, Département d'Oncologie médicale, Service d'Oncologie digestive, Villejuif, France.,Université Paris Saclay, Faculté de Médecine de Bicêtre, Le Kremlin-Bicêtre, France
| | - Abir Al Ghuzlan
- Gustave Roussy Cancer Campus, Département de Biologie et Pathologie Médicales, Service de Pathologie morphologique, Villejuif, France
| | - Jean-Yves Scoazec
- Gustave Roussy Cancer Campus, Département de Biologie et Pathologie Médicales, Service de Pathologie morphologique, Villejuif, France.,Université Paris Saclay, Faculté de Médecine de Bicêtre, Le Kremlin-Bicêtre, France
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