Malignant Pyriform Fossa Neoplasm

**Semantic type:** Neoplastic Process

**Definition:** A primary or metastatic malignant neoplasm that affects the pyriform sinus.

**Synonyms:** - Malignant Neoplasm of Pyriform Fossa - Malignant Neoplasm of Pyriform Sinus - Malignant Neoplasm of the Pyriform Fossa - Malignant Neoplasm of the Pyriform Sinus - Malignant Pyriform Fossa Tumor - Malignant Pyriform Sinus Neoplasm - Malignant Pyriform Sinus Tumor - Malignant Tumor of Pyriform Fossa - Malignant Tumor of Pyriform Sinus - Malignant Tumor of the Pyriform Fossa - Malignant Tumor of the Pyriform Sinus - Malignant neoplasm of pyriform sinus