From: The usefulness of routine histopathology of bilateral nasal polyps – a systematic review, meta-analysis, and cost evaluation
Unexpected Benign Diagnoses (N = 18):
Number of:
Inverted papilloma
16
Chronic invasive fungal sinusitis
1
Sinonasal sarcoidosis
Unexpected Malignant Diagnoses (N = 3):
Adenocarcinoma
2
Squamous cell carcinoma