• Journal of Veterinary Clinics
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• v.40 no.3
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• pp.209-214
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• 2023

A 3-year-old Thoroughbred gelding was referred to the Jeju National University Equine Hospital with prolonged unilateral nasal discharge for several months. A sinus cyst was suspected based on the history, symptoms, endoscopic findings, and radiographic results. Computed tomography (CT) scan revealed that the cyst (7.5 × 8.0 × 10.0 cm) was located between the rostral maxillary sinus and the frontal sinus, causing distortion and remodeling of the overlying bones, swelling of the overlying cutaneous tissues, and a slight deviation of the nasal septum. Standing surgery under sedation was decided to remove the cyst. A frontonasal bone flap was performed using an oscillating bone saw, and the cyst filled with pus was removed. To support the approach to the maxillary sinus, trephination was performed. The horse was treated with sinus lavage via catheterization, nebulization, antibiotics, and nonsteroidal anti-inflammatory drugs. The horse was discharged 18 days after the surgery without signs of any complication. This case showed that a CT scan could be a valuable tool for the diagnosis and subsequent surgical management of paranasal sinus cysts in horses. Also, the frontonasal bone flap was useful for exposing and removing the large-sized of cyst in the paranasal sinus.

• Nuclear Medicine and Molecular Imaging
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• v.42 no.5
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• pp.419-421
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• 2008

The false-positive FDG uptakes on head and neck areas are common due to benign lesion, iatrogenic and physiologic changes. The Schneiderian papilloma is uncommon benign tumor arising from the mucosa of the paranasal sinuses and nasal cavity. The findings of paranasal papilloma on conventional modality such as CT and MRI are non-specific and they could be confused with inflammatory polyp or retention cyst. Despite of benign tumor, the papilloma usually shows locally aggressive growth with malignant potential, therefore the FDG can be actively accumulated in this lesion. We describe the case of 18F-FDG PET/CT finding in a 77-year-old woman who demonstrates oncocytic papilloma in maxillary sinus.

• Journal of Rhinology
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• v.25 no.2
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• pp.108-113
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• 2018

Cholesterol granuloma is a disease in which cholesterol crystals act as a foreign substance in the surrounding tissues and cause granulomatous reaction and fibrosis within the chamber. It is found in various locations of the body, but the most common location is the temporal bone associated with middle ear disease. Because the disease is associated with breathing disturbance, it may also occur in the paranasal sinus. However, it has been rarely reported since its first report by Graham and Michaels in 1978. Recently, we experienced a case of cholesterol granuloma of the right maxillary sinus of a 63-year-old female patient without any nasal symptoms. We successfully managed this case with Caldwell-Luc operation. Also, we summarized the cases of cholesterol granuloma of the sinonasal region reported in Korea.