Utility of apparent diffusion coefficient in characterization of different sinonasal pathologies.

Background: Sinonasal lesions are a heterogeneous group of lesions that span from a tumor to tumor-like nature. Characterization of such cases preoperatively can improve the surgical control and the overall outcome of these patients.

Objective: In this prospective study, we aimed at evaluation of the role of apparent diffusion coefficient (ADC) in the differentiation between benign and malignant sinonasal lesions.

Diffusion-weighted MRI in diagnosing thyroid cartilage invasion in laryngeal carcinoma.

The diagnosis of thyroid cartilage invasion in patients presenting with laryngeal carcinoma is essential for pre-therapeutic staging. Compared to CT, diffusion-weighted magnetic resonance imaging (MRI) has a similar ability to define the interface between fat and tumor, but is superior for assessing muscle and cartilage invasion. Diffusion-weighted MRI may be indicated if there are equivocal findings in the CT, including possible cartilage invasion.