NCIt synonyms : Benign Neoplasm of Pyriform Sinus; Benign Pyriform Sinus Neoplasm; Benign Pyriform Fossa Tumor; Benign Neoplasm of the Pyriform Fossa; Benign Tumor of the Pyriform Fossa; Benign Tumor of the Pyriform Sinus; Benign Tumor of Pyriform Fossa; Benign Pyriform Sinus Tumor; Benign Tumor of Pyriform Sinus; Benign Neoplasm of the Pyriform Sinus; Benign Neoplasm of Pyriform Fossa;
NCIt definition : A neoplasm that arises from the pyriform sinus and is characterized by the absence
of atypical or malignant cytological and architectural features, and absence of invasive
features or metastatic potential.;