What condition could result from untreated bacterial sinusitis?

Untreated bacterial sinusitis can lead to meningitis due to the proximity of the sinuses to the brain. The infection can spread from the sinus cavities through the skull base into the central nervous system. Meningitis is characterized by inflammation of the protective membranes (meninges) surrounding the brain and spinal cord, and it can result from direct extension of infection from the sinuses.

The anatomical relationship between the sinuses, particularly the ethmoid and sphenoid sinuses, and the brain makes them vulnerable to such complications if the sinus infection is severe and left untreated. Symptoms of meningitis may include fever, headache, neck stiffness, and altered mental status, and it is a serious condition that requires prompt medical intervention.

While osteomyelitis, retinal detachment, and thyroiditis represent different medical conditions, they are not direct complications of bacterial sinusitis. Osteomyelitis is an infection of bone and can occur in various locations but is not a typical consequence of sinus infections. Retinal detachment is related to eye health and does not have a direct connection to sinus infections. Thyroiditis is inflammation of the thyroid gland and is also independent of sinus conditions.