False-positive and false-negative results of USFNA and USCNB in salivary gland tumors
| Biopsy Results | Final Pathologies |
|---|---|
| USFNA | |
| False-negative | |
| Warthin tumor | Mucoepidermoid carcinoma |
| Pleomorphic adenoma | Mucoepidermoid carcinoma |
| Pleomorphic adenoma | Mucoepidermoid carcinoma |
| Pleomorphic adenoma | Carcinoma ex pleomorphic adenoma |
| Basal cell adenoma | Basal cell adenocarcinoma |
| False-positive | |
| Squamous cell carcinoma | Warthin tumor with squamous metaplasia |
| Acinic cell carcinoma | Oncocytoma |
| Acinic cell carcinoma | Oncocytoma |
| USCNB | |
| False-negative | |
| Pleomorphic adenoma | Epithelial-myoepithelial carcinoma |
| Pleomorphic adenoma | Carcinoma ex pleomorphic adenoma |
| Pleomorphic adenoma | Carcinoma ex pleomorphic adenoma |
| Basal cell adenoma | Basal cell adenocarcinoma |
| False-positive | |
| Low-grade mucoepidermoid carcinoma | Pleomorphic adenoma |