Dental Tumour Mistaken for Sinusitis: How an Odontoma Can Cause Persistent Sinus Symptoms

Can a dental tumour cause sinusitis symptoms that won't go away?

Yes. An odontoma — a benign dental tumour made of tooth-forming tissue — can grow into the maxillary sinus and produce symptoms identical to a chronic sinus infection: facial pressure, nasal blockage, and persistent discharge. Because the dental origin is rarely suspected, patients often cycle through repeated antibiotic courses without relief. S.L. Raheja Hospital in Mumbai evaluates and treats odontogenic sinusitis through its Oral and Maxillofacial Surgery and ENT services, offering endoscopic removal when indicated.

What symptoms does an odontoma-related sinusitis cause?

Odontoma-related sinusitis produces symptoms that overlap almost entirely with conventional maxillary sinusitis, which is why it is so frequently misdiagnosed. Key features that should raise suspicion of a dental cause include:

• Unilateral symptoms — congestion, pressure, or discharge affecting only one side of the face
• Persistent or recurrent nasal discharge, often with an unpleasant odour
• Facial pain or pressure below the eye on the affected side
• Nasal blockage that does not improve with decongestants or nasal sprays
• A history of unerupted, delayed, or missing teeth on the same side
• Failure to respond to two or more standard antibiotic courses
• Occasional swelling of the upper jaw or cheek

Bilateral sinusitis is rarely caused by an odontoma. If your symptoms are strictly one-sided and treatment-resistant, a dental origin warrants investigation.

Why won't my chronic sinusitis go away — could a tooth be the cause?

Chronic sinusitis that fails to resolve with standard treatment is sometimes caused by an underlying dental or odontogenic condition rather than a primary sinus disease. The maxillary sinus sits directly above the upper back teeth, making it anatomically vulnerable to dental pathology.

Common dental causes of persistent sinusitis include:

• Odontoma — a benign tumour of tooth-forming (odontogenic) tissue that can expand into the sinus cavity
• Periapical abscess — infection at the root tip of an upper molar or premolar
• Failed or displaced dental implants
• Displaced tooth roots following extraction
• Dentigerous cysts associated with impacted teeth

In odontoma cases specifically, the mass physically obstructs sinus drainage, creates a reservoir for bacterial growth, and prevents the mucosal lining from healing — explaining why antibiotics alone cannot resolve the infection.

How is an odontoma diagnosed when sinusitis is suspected?

Diagnosing an odontoma as the cause of sinusitis requires imaging that covers both the dental structures and the sinus cavities. A standard sinus CT ordered by an ENT specialist may detect a calcified mass in the maxillary sinus, but definitive characterisation usually requires collaboration between ENT and oral and maxillofacial surgery teams.

A joint assessment by an ENT specialist and an oral and maxillofacial surgeon is the most reliable pathway to an accurate diagnosis.

How is odontogenic sinusitis treated — can endoscopic surgery cure it?

The definitive treatment for an odontoma causing sinusitis is surgical removal of the tumour combined with restoration of normal sinus drainage. Antibiotics alone cannot resolve the condition while the physical obstruction remains in place.

Treatment is typically delivered in two coordinated steps:

1. Endoscopic sinus surgery (FESS) — A functional endoscopic sinus surgery approach allows the surgeon to access the maxillary sinus through the nostril without external incisions, remove the odontoma, clear infected tissue, and widen the sinus drainage pathway.
2. Dental management — Any associated impacted teeth, cysts, or residual dental pathology are addressed by the oral and maxillofacial surgery team, either at the same operative sitting or as a planned second stage.

Following surgery, a short course of antibiotics and nasal saline irrigation supports mucosal healing. Most patients experience significant symptom relief once the obstructing mass is removed and drainage is restored.

When should you see a specialist for sinusitis that won't clear?

Seek specialist evaluation — from an ENT physician, an oral and maxillofacial surgeon, or both — if you experience any of the following:

• Sinusitis symptoms persisting for more than 12 weeks despite appropriate antibiotic treatment
• Two or more episodes of acute sinusitis within a 12-month period with incomplete resolution between episodes
• Symptoms that are strictly one-sided (unilateral facial pain, unilateral nasal discharge)
• A foul-smelling nasal discharge that does not improve with treatment
• A history of impacted, unerupted, or missing upper teeth on the affected side
• New symptoms such as eye swelling, visual changes, high fever, or severe headache — seek emergency care immediately

Early specialist review shortens the diagnostic pathway and prevents complications associated with untreated odontogenic sinusitis.

How does S.L. Raheja Hospital in Mumbai approach odontogenic sinusitis?

S.L. Raheja Hospital in Mumbai, located at Mahim West, provides a multidisciplinary pathway for patients with complex or treatment-resistant sinusitis. The hospital's ENT and Oral and Maxillofacial Surgery teams work in coordination to evaluate cases where a dental origin is suspected, arrange appropriate cross-sectional imaging, and plan endoscopic or combined surgical removal when an odontoma or other odontogenic pathology is confirmed.

Patients with associated conditions — such as diabetes, which can impair sinus mucosal healing and increase infection risk, or haematological conditions that affect surgical planning — benefit from the hospital's on-site specialist teams who contribute to pre-operative assessment and post-operative care.