Sinonasal Inverted Papilloma Showing a Misleading Finding on Magnetic Resonance Imaging.
Yuki NumanoKazuhiro NomuraMitsuru SugawaraTomotaka HemmiJun SuzukiRisako KakutaYukio KatoriPublished in: Ear, nose, & throat journal (2022)
Sinonasal inverted papilloma (IP) is the most common benign tumor in sinonasal cavities. Treatment involves excising the whole tumor, so it is essential to evaluate the extent of the tumor by preoperative radiographic findings. Magnetic resonance imaging (MRI) is superior to computed tomography (CT) for determining a tumor's location as MRI can discern the difference between mucus and IP. We herein report a 51-year-old man with sinonasal IP treated with endoscopic sinus surgery (ESS). Preoperative MRI showed findings resembling a convoluted cerebriform pattern on T2-weighted imaging, but this site was not enhanced by intravenous gadolinium at all. We preoperatively suspected that this site was not part of the tumor but rather the accumulation of mucus, and indeed, we found no tumor at this site when we performed the surgery. This patient is a valuable example of misleading findings of IP on T2-weighted imaging and underscores the importance of contrast-enhanced T1-weighted imaging to determine the extent of IP.
Keyphrases
- contrast enhanced
- magnetic resonance imaging
- computed tomography
- diffusion weighted
- magnetic resonance
- diffusion weighted imaging
- dual energy
- high resolution
- positron emission tomography
- minimally invasive
- patients undergoing
- coronary artery bypass
- acute coronary syndrome
- photodynamic therapy
- high dose
- low dose
- ultrasound guided
- percutaneous coronary intervention
- mass spectrometry