Polypoid adenosquamous carcinosarcoma of the epiglottis with blastomatous features.

A case is reported of polypoid adenosquamous carcinosarcoma with blastomatous features arising in the epiglottis. A 69-year-old man with hoarseness and sore throat was found to have a six cm pedunculated mass located on the epiglottis. Upon examination by light microscopy, it was found that the tumor was composed of not only well to poorly differentiated in situ and invasive squamous cell carcinoma but also adenocarcinoma with blastomatous features and a malignant primitive stroma, with features of undifferentiated sarcoma and focal chondrosarcomatous differentiation. To the best of our knowledge, this appears to be the second case of laryngeal adenosquamous carcinosarcoma with blastomatous features reported in the English literature and the third case in the world literature.