Mediastinal eosinophilic sclerosing fibroplasia associated with infection in a cat

Case summary A 7-year-old female spayed domestic shorthair cat presented with respiratory distress. Initial diagnostics revealed a large cystic mass in the mediastinum and moderate hyperglobulinaemia. Additional abnormalities were ruled out through thoracic and abdominal CT. The mass was surgically...

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Main Authors: Celia van Grieken, Nerea Cuesta, Mireia Fernandez
Format: Article
Language:English
Published: SAGE Publishing 2025-07-01
Series:Journal of Feline Medicine and Surgery Open Reports
Online Access:https://doi.org/10.1177/20551169251347945
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author Celia van Grieken
Nerea Cuesta
Mireia Fernandez
author_facet Celia van Grieken
Nerea Cuesta
Mireia Fernandez
author_sort Celia van Grieken
collection DOAJ
description Case summary A 7-year-old female spayed domestic shorthair cat presented with respiratory distress. Initial diagnostics revealed a large cystic mass in the mediastinum and moderate hyperglobulinaemia. Additional abnormalities were ruled out through thoracic and abdominal CT. The mass was surgically removed, and antibiotic treatment was started based on cytological findings of intralesional bacteria. Histopathology and microbiology confirmed a severe inflammatory reaction pattern compatible with feline eosinophilic sclerosing fibroplasia (FESF) associated with Staphylococcus aureus . After surgery and antibiotic therapy, clinical signs and related abnormalities fully resolved. At the time of writing, 24 months postoperatively, the patient shows no evidence of relapse. Relevance and novel information FESF, initially described as an inflammatory condition affecting the gastrointestinal tract, has also been anecdotally reported in other locations, including the retroperitoneum, retropharyngeal region and mediastinum. This report is the second to document a mediastinal presentation without concurrent abdominal involvement, and the first to achieve long-term remission without the use of immunosuppressants. It supports the hypothesis that FESF may represent a characteristic pattern of inflammation secondary to a range of triggers rather than a distinct disease process, indicating that treatment should probably target the specific underlying cause.
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spelling doaj-art-cfedb347ad7e4b44bd76b0db566b94212025-08-20T03:51:14ZengSAGE PublishingJournal of Feline Medicine and Surgery Open Reports2055-11692025-07-011110.1177/20551169251347945Mediastinal eosinophilic sclerosing fibroplasia associated with infection in a catCelia van Grieken0Nerea Cuesta1Mireia Fernandez2AniCura Glòries Hospital Veterinari, Barcelona, SpainIdexx Laboratory, Wetherby, United KingdomAniCura Glòries Hospital Veterinari, Barcelona, SpainCase summary A 7-year-old female spayed domestic shorthair cat presented with respiratory distress. Initial diagnostics revealed a large cystic mass in the mediastinum and moderate hyperglobulinaemia. Additional abnormalities were ruled out through thoracic and abdominal CT. The mass was surgically removed, and antibiotic treatment was started based on cytological findings of intralesional bacteria. Histopathology and microbiology confirmed a severe inflammatory reaction pattern compatible with feline eosinophilic sclerosing fibroplasia (FESF) associated with Staphylococcus aureus . After surgery and antibiotic therapy, clinical signs and related abnormalities fully resolved. At the time of writing, 24 months postoperatively, the patient shows no evidence of relapse. Relevance and novel information FESF, initially described as an inflammatory condition affecting the gastrointestinal tract, has also been anecdotally reported in other locations, including the retroperitoneum, retropharyngeal region and mediastinum. This report is the second to document a mediastinal presentation without concurrent abdominal involvement, and the first to achieve long-term remission without the use of immunosuppressants. It supports the hypothesis that FESF may represent a characteristic pattern of inflammation secondary to a range of triggers rather than a distinct disease process, indicating that treatment should probably target the specific underlying cause.https://doi.org/10.1177/20551169251347945
spellingShingle Celia van Grieken
Nerea Cuesta
Mireia Fernandez
Mediastinal eosinophilic sclerosing fibroplasia associated with infection in a cat
Journal of Feline Medicine and Surgery Open Reports
title Mediastinal eosinophilic sclerosing fibroplasia associated with infection in a cat
title_full Mediastinal eosinophilic sclerosing fibroplasia associated with infection in a cat
title_fullStr Mediastinal eosinophilic sclerosing fibroplasia associated with infection in a cat
title_full_unstemmed Mediastinal eosinophilic sclerosing fibroplasia associated with infection in a cat
title_short Mediastinal eosinophilic sclerosing fibroplasia associated with infection in a cat
title_sort mediastinal eosinophilic sclerosing fibroplasia associated with infection in a cat
url https://doi.org/10.1177/20551169251347945
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AT mireiafernandez mediastinaleosinophilicsclerosingfibroplasiaassociatedwithinfectioninacat