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Tauziède-Espariat A, Sievers P, Larousserie F, Benzakoun J, Guillemot D, Pierron G, Duchesne M, Uro-Coste E, Roux A, Vasiljevic A, Fenouil T, Meyronet D, Mokhtari K, Polivka M, Rousseau A, Bost-Bezeaud F, Akoury S, Pallud J, Benevello C, Hasty L, Gareton A, Lechapt E, Chrétien F, Blauwblomme T, Beccaria K, Puget S, Sahm F, Varlet P. An integrative histopathological and epigenetic characterization of primary intracranial mesenchymal tumors, FET:CREB-fused broadening the spectrum of tumor entities in comparison with their soft tissue counterparts. Brain Pathol 2021; 32:e13010. [PMID: 34314078 PMCID: PMC8713527 DOI: 10.1111/bpa.13010] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 06/24/2021] [Accepted: 07/06/2021] [Indexed: 12/11/2022] Open
Abstract
FET:CREB fusions have been described in a variety of tumors from various phenotypes. Recently, these fusion transcripts were reported in intracranial tumors, variably named intracranial mesenchymal myxoid tumors or angiomatoid fibrous histiocytomas. Controversy remains concerning the terminology for these tumors. Here, we report 11 cases of central nervous system mesenchymal tumors with proven FET:CREB fusion. Most DNA methylation profiles were not classifiable using the Heidelberg Brain Tumor or Sarcoma Classifier (v11b4/v12.2). However, by using unsupervised t‐SNE and hierarchical clustering analyses, six of the cases constituted a distinct cluster. The remaining four tumors showed no obvious relation to any of the other referenced classes but were close to the clusters of extra‐CNS angiomatoid fibrous histiocytomas (n = 1), clear cell sarcomas (n = 1), or solitary fibrous tumors (n = 2). Our findings confirm that intracranial FET:CREB‐fused tumors do not represent a single molecular tumor entity, although most samples clustered close to each other, indicating the existence of a distinct epigenetic group that could potentially be partially masked by the low number of cases included. Further analyses are needed to characterize intracranial FET:CREB fused‐defined tumors in more detail.
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Affiliation(s)
- Arnault Tauziède-Espariat
- Department of Neuropathology, GHU Paris-Psychiatrie et Neurosciences, Sainte-Anne Hospital, Paris, France.,Institut de Psychiatrie et Neurosciences de Paris (IPNP), UMR S1266, INSERM, IMA-BRAIN, Paris, France
| | - Philipp Sievers
- Department of Neuropathology, Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany.,Clinical Cooperation Unit Neuropathology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Frédérique Larousserie
- Department of Pathology, Cochin Hospital, AP-HP Paris, Université de Paris, Paris, France
| | - Joseph Benzakoun
- Institut de Psychiatrie et Neurosciences de Paris (IPNP), UMR S1266, INSERM, IMA-BRAIN, Paris, France.,Department of Radiology, GHU Paris-Psychiatrie et Neurosciences, Sainte-Anne Hospital, Paris, France
| | - Delphine Guillemot
- Paris-Sciences-Lettres, Institut Curie Research Center, INSERM U830, Paris, France.,Laboratory of Somatic Genetics, Institut Curie Hospital, Paris, France
| | - Gaëlle Pierron
- Paris-Sciences-Lettres, Institut Curie Research Center, INSERM U830, Paris, France.,Laboratory of Somatic Genetics, Institut Curie Hospital, Paris, France
| | - Mathilde Duchesne
- Department of Pathology, Dupuytren University Hospital, Limoges, France
| | - Emmanuelle Uro-Coste
- Department of Pathology, Toulouse University Hospital, Toulouse, France.,Cancer Research Center of Toulouse (CRCT), INSERM U1037, Toulouse, France.,Toulouse III, Université Paul Sabatier, Toulouse, France
| | - Alexandre Roux
- Institut de Psychiatrie et Neurosciences de Paris (IPNP), UMR S1266, INSERM, IMA-BRAIN, Paris, France.,Department of Neurosurgery, GHU Paris-Psychiatrie et Neurosciences, Sainte-Anne Hospital, Paris, France
| | - Alexandre Vasiljevic
- Department of Pathology and Neuropathology, GHE, Hospices civils de Lyon, France
| | - Tanguy Fenouil
- Department of Pathology and Neuropathology, GHE, Hospices civils de Lyon, France
| | - David Meyronet
- Department of Pathology and Neuropathology, GHE, Hospices civils de Lyon, France
| | - Karima Mokhtari
- Department of Neuropathology, Pitié-Salpêtrière Hospital, AP-HP Paris, Paris, France
| | - Marc Polivka
- Department of Pathology, Lariboisière Hospital, AP-HP Paris, Paris, France
| | | | | | - Samir Akoury
- Department of Neurosurgery, Hospital of French Polynesia, Tahiti, France
| | - Johan Pallud
- Institut de Psychiatrie et Neurosciences de Paris (IPNP), UMR S1266, INSERM, IMA-BRAIN, Paris, France.,Department of Neurosurgery, GHU Paris-Psychiatrie et Neurosciences, Sainte-Anne Hospital, Paris, France
| | - Chiara Benevello
- Department of Neurosurgery, GHU Paris-Psychiatrie et Neurosciences, Sainte-Anne Hospital, Paris, France
| | - Lauren Hasty
- Department of Neuropathology, GHU Paris-Psychiatrie et Neurosciences, Sainte-Anne Hospital, Paris, France
| | - Albane Gareton
- Department of Neuropathology, GHU Paris-Psychiatrie et Neurosciences, Sainte-Anne Hospital, Paris, France
| | - Emmanuèle Lechapt
- Department of Neuropathology, GHU Paris-Psychiatrie et Neurosciences, Sainte-Anne Hospital, Paris, France
| | - Fabrice Chrétien
- Department of Neuropathology, GHU Paris-Psychiatrie et Neurosciences, Sainte-Anne Hospital, Paris, France
| | - Thomas Blauwblomme
- Department of Paediatric Neurosurgery, Necker Hospital, APHP, Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Kévin Beccaria
- Department of Paediatric Neurosurgery, Necker Hospital, APHP, Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Stéphanie Puget
- Department of Paediatric Neurosurgery, Necker Hospital, APHP, Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Felix Sahm
- Department of Neuropathology, Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany.,Clinical Cooperation Unit Neuropathology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany.,Hopp Children's Cancer Center Heidelberg (KiTZ, Heidelberg, Germany
| | - Pascale Varlet
- Department of Neuropathology, GHU Paris-Psychiatrie et Neurosciences, Sainte-Anne Hospital, Paris, France.,Institut de Psychiatrie et Neurosciences de Paris (IPNP), UMR S1266, INSERM, IMA-BRAIN, Paris, France
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Rodrigues RM, Fernandes AGDO, de Oliveira SP, Camisasca DR, Marques AA, Lourenço SDQC. Solitary fibrous tumor of the floor of the mouth. J Clin Exp Dent 2017; 9:e1153-e1157. [PMID: 29075420 PMCID: PMC5650220 DOI: 10.4317/jced.53492] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 05/20/2017] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND A solitary fibrous tumor (SFT) of the oral cavity is an extremely rare entity. Its diagnosis is complicated because of its diverse morphology and similarity to other mesenchymal diseases. CASE REPORT A rare case of SFT involving floor of the mouth is presented. The tumor was well circumscribed and almost spherical, measuring approximately 3 cm in diameter. Patient was submitted to biopsy and histopathologic examination showed a tumor composed of spindle to epithelioid cells showing pale to eosinophilic cytoplasm, oval or elongated nuclei with inconspicuous nucleoli. Tumor cells showed strong positivity for CD34, vimentin and Bcl-2. SFTs may present as a diagnostic challenge. The patient was followed for 8 years without recurrences. RESULTS SFT is an uncommon disease in maxillofacial region; however it should be considered in the differential diagnosis of spindle cell neoplasms with oral manifestation. Only a few cases have been reported in the floor of mouth. We describe a new case of SFT arising at this location. Key words:Solitary fibrous tumors, mouth floor, oral diagnosis.
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Affiliation(s)
| | | | - Silvia-Paula de Oliveira
- DDS, PhD in Oral Pathology dentist of the Federal University of Rio de Janeiro (UFRJ), University Hospital Clementino Fraga Filho (HUCFF) and Brazilian Central Army Odontoclinic
| | - Danielle-Resende Camisasca
- DDS, PhD in oral Pathology, Department of Pathology, Dental School, Fluminense Federal University (UFF), Nova Friburgo, RJ, Brazil; Interim Professor at Espirito Santo Federal University (UFES)
| | - André-Aguiar Marques
- DDS, MSc in Oral Pathology dentist of the Fluminense Federal University (UFF), Maxillofacial surgeon in the local Hospital of Itaguaí/RJ, Dentist Maxillofacial of Brazilian Army
| | - Simone-de Queiroz Chaves Lourenço
- DDS, PhD in oral Pathology, Department of Oral Pathology, Professor in Odontology Graduate Program, Fluminense Federal University (UFF), Niterói, Brazil
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