From: A prospective study on the microbiological examination of secretions from the paranasal sinuses in horses in health and disease
Aetiology
Number of cases
Dental sinusitis
26
Primary sinusitis
14
Paranasal sinus cyst
2
Progressive ethmoidal haematoma
Traumatic sinusitis
Conchal necrosis
1
Malignant neoplasia
3
Total
50