A Case Report: Mucocele of the Sphenoid, Ethmoid and Frontal Sinuses Presenting with Proptosis, Visual Impairment and Diplopia

Mucocele of the paranasal sinus is accumulation of the mucoid secretion within the sinus caused by
obstruction of the sinus ostium. It is occasionally presents with proptosis, diplopia and visual
impairment. It is rarely presents with cerebral abscess or meningitis. It is more common in frontal
sinuses, less common in ethmoid sinuses and rare in sphenoid sinus, which constitutes less than 2%
of all paranasal sinuses mucocele. We report a case of paranasal sinus mucocele presented with
proptosis in right eye, diplopia, visual impairment and headache. Magnetic resonance imaging (MRI)
revealed a polyp in right anterior ethmoid sinus and nasal cavity resulted in mucocele of the sphenoid,
ethmoid and right frontal sinuses. Early diagnosis and timely management is of paramount importance
to prevent the intracranial and intraorbital extension and its complications. MRI is the best modality to
evaluate the extent of the mucocele. Contrast enhanced MRI is useful in differentiating mucocele from
Sino nasal tumours.