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Description

Key Feature Summary for Mucous gland adenoma:  
• Rare benign proximal endobronchial tumor   
 • Airway obstruction symptoms common 
• Exophytic, mucoid endobronchial nodules
 • Cystic, acinar, tubular architecture   
• Bland mucous cell lining, no atypia 
• Positive for keratin, EMA, and CEA; low Ki-67 proliferation index
• Main differential diagnosis: mucoepidermoid carcinoma, mucinous adenocarcinoma 
• Cured by complete resection