CASE PRESENTATION: Case 1: A 57 y/o female with recently diagnosed hypothyroidism presented with worsening SOB, stridor and dysphagia for 6 weeks. CT scan showed a lower neck soft tissue mass encasing and invading the subglottic larynx, trachea and esophagus and large cervicothoracic region mass. Biopsy showed mantle cell lymphoma and she underwent a thyroid isthmusectomy and tracheostomy. She completed 3 rounds of chemotherapy and her tracheostomy was removed 2 months later. She was doing well until 3 months later when she developed worsening stridor and SOB. On admission she had loud inspiratory stridor, expiratory wheezing and decreased air movement bilaterally. CT neck showed decrease in the size of the infiltrative mass involving the thyroid gland and 50% focal narrowing of the subglottic airway. Bronchoscopy showed 60% tracheal occlusion by an endobronchial mass. The mass was debulked using cautery knife and cryoprobe. Balloon dilation was then performed. The end result was less than 10% tracheal stenosis. She experienced significant improvement in her dyspnea and stridor. Pathology from the tracheal mass again revealed high grade, large B cell, malignant mantle cell lymphoma. Case 2: An 85 y/o male with COPD presented with weight loss and progressive dysphagia for 2 months. CT chest revealed a 2.5cm tracheal mass extending into the mediastinum, causing at least 50% narrowing of the trachea and consolidation of right middle lobe. On admission he developed acute respiratory failure from upper airway obstruction and was intubated. Bronchoscopy revealed a large polypoid tracheal mass found 5cm from the carina, causing 80% obstruction. The endobronchial component was removed using endoscopic electrosurgery. The histopathology was consistent with malignant large B cell follicular lymphoma. The patient was successfully extubated.