Sinonasal Undifferentiated Carcinoma in a Patient Previously Treated for an Intestinal-Type Adenocarcinoma: Metachronous Neoplasms or Recurrence of a Different Tumor Type?

Indian J Otolaryngol Head Neck Surg. 2019 Nov;71(Suppl 3):1779-1781. doi: 10.1007/s12070-017-1126-1. Epub 2017 Apr 20.

Abstract

A case of a sinonasal undifferentiated carcinoma occurring 2 years after a successfully surgically treated intestinal-type adenocarcinoma has never been reported. Treatment modality of paranasal sinus cancer strictly depends on histology so it is important to recognize a different tumor type in the follow-up of these patients.

Keywords: Endoscopic resection; Intestinal-type adenocarcinoma; Metachronous tumor; Paranasal sinus tumor; Sinunasal undifferentiated carcinoma.