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