engleski

PARANASAL SINUS CYST AND ETHMOID HAEMATOMA IN HORSE – A CASE REPORT

Paranasal sinus cysts are the second most common cause of secondary sinusitis in horses. The most common clinical signs are dyspnoea, facial swelling, epiphora and nasal discharge. The diagnosis is made by confirming the presence of a yellow, viscous, translucent and odourless fluid obtained via sinus centesis. Radiography, endoscopy and CT scanning can provide additional data, useful for treatment planning and prognosis. A 12-year-old Warmblood mare was admitted with a five-month history of epistaxis and facial swelling. At admission, a swollen area of 5x3 cm in size proximal of crista facialis was obvious together with epiphora and blepharospasm in the right eye. A strong stertor could be heard during rest. A sinus centesis revealed the presence of a large volume of yellow, viscous fluid. Cytology findings showed a high number of neutrophils with protein precipitation. Radiography discovered osteolytic processes with complete shading of maxillary and frontal sinuses and a mild deviation of the nasal septum. Endoscopic findings included a constriction of ventral nasal meatus of the affected side. Standing surgery was attempted, but due to her temper, the surgery had to be performed in general anaesthesia. A frontonasal flap was performed and a cyst with a yellow, smooth surface was observed. The cyst was stretching through all ipsilateral sinuses and it was not possible to differentiate between sinus compartments. The majority of the cyst content was removed and a Foley catheter was placed into the sinus cavity. Before recovery, PCV was 27%. The mare died during recovery due to hypovolemic shock. Histopathology of the cyst material revealed the aetiology of a progressive ethmoid haematoma. Paranasal sinus cyst is a progressive disease that requires surgical intervention. In the present case, an earlier diagnosis and surgical procedure in standing sedation could have had a different outcome. Paranasal sinus cyst is a diagnosis that is not to be overlooked in cases of secondary sinusitis.

Paranasal sinus cyst, Ethmoid haematoma, Horse

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