Tumors in Tight Spots

Question: A 65 year old male is referred to you for progressive exertional dyspnea and mild dysphagia. He notes symptoms for 3 years that have gradually become more troublesome. Prior treatment for presumed asthma was not beneficial. Laryngoscopy reveals normal vocal fold mobility with fullness in the postcricoid region.  A laryngeal CT is obtained that reveals an expansile, lytic lesion of the cricoid cartilage.  What is the most likely diagnosis?

    [Answer will be posted with next week's new question]

Answer to last week's question, "Water from the Ear" (January 15, 2017)

C, 60%.