2024年10月10日 · Sinonasal polyposis refers to the presence of multiple benign polyps in the nasal cavity and paranasal sinuses. Sinonasal polyposis is most commonly encountered in adults and rare in children. Polyps are the most common expansile lesions of the nasal cavity 8. Conditions known to be associated with polyps include 10:

2009年2月25日 · There is bilateral opacification of the nasal cavities, usually a sign of an inflammatory process or polyps. Note the concentric lamellated appearance of alternating hyper- and hypodensity in the maxillary sinusses. The hyperdensity is due to inspissated secretions and fungal elements.

MRI can detect CRS, including key abnormalities such as mucosal swelling, mucopyoceles, nasal polyps, and medial maxillary sinus wall deformation . The better differentiation of soft tissue by MRI allows for the determination of specific structural abnormalities of the paranasal sinuses that may otherwise not be differentiated by CT [ 59 ].

Features are suggestive of benign sinonasal polyposis on top of chronic sinusitis. Contrast-enhanced MRI helps to differentiate it from probable malignant sinonasal tumors.

2017年5月14日 · Nasal Polyposis. Nasal polyps arise from any portion of the nasal mucosa or paranasal sinuses as the end result of various sinonasal disease processes. The most common mucosal polyps are benign nasal cavity inflammatory lesions that arise from the mucosa of the nasal cavity or the paranasal sinuses often at the outflow tract of the sinuses.

Since the complete characterization of nasal polyps on CT or MR images is very challenging, we provide a critical review of the best imaging methods and essential reporting elements used to assess nasal polyps.

2010年1月1日 · Radiology plays several crucial roles in the evaluation of chronic rhinosinusitis (CRS) patients with nasal polyposis (NP), including establishing the diagnosis, evaluating progression of disease, surgical planning, and monitoring for recurrence.

2024年4月12日 · Polyps appear as hypodense, soft-tissue masses which obliterate the nasal cavity. Hyperdensity suggests increased protein content or fungal infection. They may cause bone thinning but not bony destruction. MRI. Polyps are typically hypointense on T1-weighted images and hyperintense on T2-weighted images. Diagnosis

2024年12月9日 · Initial imaging frequently involves computed tomography or cone beam computed tomography (CBCT) to evaluate the bony anatomy of the nasal cavity and surrounding sinuses, while magnetic resonance imaging (MRI) is typically used for detailed assessment of soft tissues and to aid in differential diagnosis when the findings are inconclusive.

Forty patients with SAP confirmed pathologically were retrospectively reviewed. Of the 40 patients undergoing MR imaging, 39 had postcontrast T1WI; 30, DCE MR imaging; and 17, DWI. The image features assessed included the location, shape, margin, size, signal intensity, and enhancement pattern on DCE MR imaging and ADC maps.