What are the causes of bilateral maxillary sinusitis?

Differential Diagnosis for Inflammation of Bilateral Maxillary Sinuses

• Single most likely diagnosis + Chronic rhinosinusitis: This is the most common cause of bilateral maxillary sinus inflammation, often resulting from a combination of factors including allergies, environmental irritants, and anatomical issues.
• Other Likely diagnoses + Acute rhinosinusitis: Typically caused by viral or bacterial infections, this condition can lead to inflammation of the maxillary sinuses and is often accompanied by symptoms such as facial pain, nasal congestion, and purulent discharge. + Allergic fungal sinusitis: An allergic reaction to fungi in the sinuses can cause chronic inflammation and is more likely to affect both maxillary sinuses. + Vasomotor rhinitis: Although primarily affecting the nasal passages, vasomotor rhinitis can lead to secondary sinusitis due to chronic nasal congestion and irritation.
• Do Not Miss diagnoses + Wegener's granulomatosis (Granulomatosis with Polyangiitis): A rare autoimmune disorder that can cause destructive inflammation of the sinuses, among other symptoms. It's crucial to diagnose early due to its potential for severe complications. + Sarcoidosis: An autoimmune disease that can affect multiple parts of the body, including the sinuses, leading to granulomatous inflammation. It's essential to consider due to its systemic implications. + Invasive fungal sinusitis: Especially in immunocompromised patients, this condition can be life-threatening and requires prompt diagnosis and treatment.
• Rare diagnoses + Churg-Strauss syndrome (Eosinophilic Granulomatosis with Polyangiitis): A rare autoimmune condition characterized by asthma, eosinophilia, and vasculitis, which can involve the sinuses. + Sinus histiocytosis with massive lymphadenopathy (Rosai-Dorfman disease): A rare and benign condition that can cause sinus inflammation among other symptoms. + Cystic fibrosis: Although more commonly associated with respiratory and pancreatic issues, cystic fibrosis can lead to chronic sinusitis due to the abnormal mucus production.