Peer-reviewed veterinary case report
Filly with nasal mass causing breathing trouble diagnosed by CT
By Smith, H L et al.·Published in Australian veterinary journal·2017·School of Veterinary Science, Australia·View original on PubMed →
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Original publication title: Maxillary unicystic ameloblastoma in a 6-week-old filly evaluated with computed tomography.
- Species:
- horse
Plain-English summary
A 6-week-old Thoroughbred filly was brought in because she had a noticeable mass over her right nasal passage, which was making it hard for her to breathe normally. X-rays and a CT scan showed that the mass was located near her baby teeth and was blocking her nasal cavity. Unfortunately, because of the filly's future as an athlete, surgery was not considered a good option, and her owners chose to euthanize her. The mass was diagnosed as a unicystic ameloblastoma, a type of tumor that can occur in the mouth.
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Abstract
CASE REPORT: A 6-week-old Thoroughbred filly was presented for evaluation of an expansile mass overlying the right nasal passage and causing respiratory stertor. On skull radiographs, there was a loculated, soft tissue-opaque mass identified dorsal to the right upper premolars and effacing the right nasal cavity. Computed tomography (CT) revealed a locally extensive mass with relatively benign characteristics located centrally on the tooth root apices of the deciduous second premolar (506). The mass extended axially into the right nasal cavity, occluding the meatuses and causing displacement of the nasal septum to the left. CLINICAL OUTCOME & SIGNIFICANCE: Surgical excision was not deemed feasible with an athletic future in mind and the owners elected to euthanase the filly. Histopathologically, the mass was consistent with unicystic ameloblastoma and was lined intermittently with palisading, columnar basal cells (ameloblast-like cells) overlying a zone containing stellate cells in loose stroma. To the authors' knowledge this is the first report of a CT scan of an equine ameloblastoma. Although histopathology was essential for definitive diagnosis, CT clearly defined the origin of the mass and identified its locally extensive, cystic nature, which enabled informed decisions to be made.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/28749026/