A rare case of nasal osteoma in a dog: a case report

Abstract

A 35-month-old female German shepherd weighing 33.2 kg was referred to our department with a 10-month history of sneezing and left nasal swelling. On clinical examination, the dog showed deformity of the left nasal plane in the absence of any cutaneous lesions or nasal discharge, and presented with nasal snoring noises during both the inspiratory and expiratory phases. The patency of nasal cavities was evaluated using the cotton swab test, and was found to be preserved only on the right side. Endoscopic, radiographic and computed tomographic examination revealed an osteoproductive lesion that distorted the nasal, maxillar and frontal bones, completely occupying the left nasal cavity and frontal sinuses, resulting in destruction of the nasal septum and invasion of the contralateral nasal cavity. Five bioptic samples of the mass were collected from the cutaneous surface using a 9G Jamshidi bone marrow bioptic instrument. Histologically, the lesion consisted of a non-encapsulated, multilobulated mass composed of dense coalescing trabeculae of well-differentiated bone, which was lined by osteogenic cells. The morphology was suggestive of nasal osteoma. Due to the large size of the mass, evidenced by computed tomography, chronic systemic nonsteroidal anti-inflammatory treatment with carprofen was proposed instead of surgery. The description of this case is useful for veterinarians, who should consider osteoma as a possible differential diagnosis for nasal tumours.

Sinonasal neoplasms in 49 dogs: clinical, macroscopic, and histopathological aspects

“…The clinical signs described for the dogs in this study were mainly related to involvement in the upper respiratory tract, including partial or total obstruction of the nasal cavity, breathing difficulty, sneezing, presence of nasal discharge, and cough, being similar to that previously observed (Segal et al 1986, Rocha et al 2008, Cruz et al 2009, Gonçalves et al 2012, Galiazzo et al 2017. However, attention was drawn to the frequency of dogs with neurological signs related to when the neoplasm invaded the brain and adjacent tissues or when it was primary in the brain, as in the case of the three meningiomas observed.…”

Curative‐intent minimal ostectomy for canine oral osteoma

“…Two cases were treated with maxillectomy, two were marginally excised, two were debulked and two (orbital and nasal) were treated with non-steroidal anti-inflammatories. 5,6,12 A histological review describing the features of bone lesions has also been published. This paper reports additional five cases of canine osteoma.…”

“…It is suggested that local recurrence following incomplete excision is likely, and the reported gold standard treatment is removal with up to 2 cm margins. 4,5 Here, the authors describe the clinical presentation, diagnosis and histopathology of a mandibular and a maxillary osteoma treated with minimal ostectomy in two dogs using a high-speed burr and curettage, with no associated complications and no recurrence to date.…”

Standing excision of a paranasal osteoma in a 3‐year‐old Standardbred gelding

“…There are only 25 cases reported in the literature, all located within the skull apart from one in the proximal tibia 4 . Osteomas located outside the paranasal sinuses have been documented in other species including cattle, birds, dogs and sheep, although the prevalence is still extremely low 5–8 . In horses, clinical signs often include unilateral nasal discharge, bony malformation and obstruction of airflow 1,3,9,10 .…”

“…4 Osteomas located outside the paranasal sinuses have been documented in other species including cattle, birds, dogs and sheep, although the prevalence is still extremely low. [5][6][7][8] In horses, clinical signs often include unilateral nasal discharge, bony malformation and obstruction of airflow. 1,3,9,10 Other less commonly described clinical signs include exophthalmos, ocular distortion and facial swelling, 1 which can ultimately lead to interference with prehension, mastication and deglutition of food.…”