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Mandibular Osteoma in a Haflinger Mare: Clinical and Pathological Features
Raffaella Maggi1, Douglas Mudimba2, Giuseppe Marruchella3
1Veterinary Practitioner, Via Cassia 929, Rome, Italy.
Journal of Equine Veterinary Science
|June 18, 2022
Summary
A slowly growing mandibular mass in a Haflinger mare was diagnosed as an osteoma. Surgical excision for this benign bone tumor offers a good prognosis.
Area of Science:
- Veterinary Pathology
- Equine Medicine
Background:
- Osteomas are benign bone tumors that can occur in horses, often affecting the paranasal sinuses and mandible.
- Distinguishing osteomas from other bone lesions like ossifying fibroma and fibrous dysplasia is crucial for accurate diagnosis and treatment.
Observation:
- An 11-year-old Haflinger mare presented with a slow-growing, pedunculated, firm mass on the ventral mandible.
- Radiography revealed a radiopaque, multi-lobular, mushroom-like lesion arising from the mandibular cortex without medullary cavity involvement.
Findings:
- Microscopic examination showed bone trabeculae covered by periosteum-like connective tissue.
- Clinical, imaging, and pathological features supported a diagnosis of mandibular osteoma.
- Pedunculated lesions arising from the bone surface are highly suggestive of osteoma.
Implications:
- Mandibular osteomas in horses, though rare, are treatable with surgical excision.
- Complete removal is essential for a favorable prognosis, with outcomes dependent on lesion size and location.
- Accurate diagnosis is vital to differentiate from other neoplastic and non-neoplastic bone conditions.
