NCIt definition : An aggressive variant of squamous cell carcinoma that arises from the pyriform sinus
or supraglottic area. It is characterized by the presence of small malignant cells
with hyperchromatic nuclei and scant amount of cytoplasm forming lobules with peripheral
palisading. Comedonecrosis may be present. An in situ or invasive keratinizing squamous
cell carcinoma component is always present. Signs and symptoms include hoarseness,
dysphagia, pain, and neck mass.;