Differential Diagnosis for Bumps Inside Nose that Go External
- Single most likely diagnosis
- Nasal polyps: These are soft, painless, noncancerous growths on the lining of the nasal passages or sinuses. They can protrude into the nasal cavity and sometimes can be seen externally, especially if they are large. Justification: Common condition, often presents with nasal obstruction, loss of smell, and visible masses.
- Other Likely diagnoses
- Rhinophyma (a form of rosacea): Characterized by a large, red, bumpy, or bulbous nose. It can appear as bumps that are both internal and external due to the inflammation and enlargement of the sebaceous glands. Justification: Common in adults, especially those with a history of rosacea.
- Nasal papillomas: These are benign growths that can occur inside the nose and, in some cases, may protrude externally. Justification: Less common but can cause similar symptoms to nasal polyps.
- Allergic reactions or contact dermatitis: Can cause bumps or swelling inside and around the nose. Justification: Common and can be caused by a variety of allergens or irritants.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Squamous cell carcinoma or basal cell carcinoma: Although rare, these types of skin cancers can present as bumps inside the nose that grow externally. Justification: Potentially life-threatening if not diagnosed and treated early.
- Invasive fungal sinusitis: A rare but serious condition that can cause destruction of the nasal and sinus tissues, presenting with masses or bumps. Justification: Highly dangerous, especially in immunocompromised patients, requiring prompt diagnosis and treatment.
- Wegener's granulomatosis (Granulomatosis with Polyangiitis): A rare autoimmune disorder that can cause inflammation of the blood vessels and present with nasal masses or bumps. Justification: Serious condition that can lead to significant morbidity and mortality if not treated.
- Rare diagnoses
- Nasal glioma: A rare, benign tumor that can present as a mass in the nose. Justification: Extremely rare, usually present at birth or in early childhood.
- Dermoid cysts: Can occur in the nose and may appear as bumps or masses. Justification: Rare, congenital condition that may not be immediately apparent.
- Rhinoscleroma: A chronic granulomatous infection that can cause nasal masses. Justification: Rare in many parts of the world, more common in certain endemic areas.