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Congress: ECR24
Poster Number: C-13340
Type: EPOS Radiologist (educational)
Authorblock: A. P. Steorobaneanu, S. Neveu, M. Becker; Geneva/CH
Disclosures:
Ariadna Patricia Steorobaneanu: Nothing to disclose
Sophie Neveu: Nothing to disclose
Minerva Becker: Nothing to disclose
Keywords: Ear / Nose / Throat, Head and neck, Salivary glands, MR, Diagnostic procedure, Neoplasia
Learning objectives The aims of this educational poster are: to discuss key features of multiparametric MRI in salivary gland tumours (SGTs), to show how to combine morphologic sequences with diffusion-weighted imaging (DWI) and dynamic contrast enhanced imaging (DCE-MRI) for an accurate diagnosis to illustrate tricky cases where a combined MRI and ultrasound guided fine needle aspiration cytology (USFNAC) approach is necessary.
Read more Background Benign and malignant salivary tumours (SGTs) have overlapping clinical, radiologic, and pathologic features. Characterisation of SGTs and precise depiction of deep tumour spread play a key role for treatment planning, surgery being the first therapeutic option in most cases. Therefore, the radiological characteristics of SGTs can help to solve diagnostic dilemmas in many situations thus contributing to adequate therapeutic approaches.Ultrasound (US) is often used as the initial imaging method in many institutions. Besides its low specificity for the distinction between...
Read more Findings and procedure details MRI PROTOCOLThe recommended multiparametric MRI protocols must include the following: Unenhanced T1 and T2 without fat saturation (FS). The purpose is to assess lesion borders, tumour homo/heterogeneity and signal compared to the surrounding tissues. DWI with 2 b-values (0; 1000 s/mm2) or 3 b-values (0; 500; 1000 s/mm2) and with calculation of an apparent diffusion coefficient (ADC in mm2/s) map. The purpose is to assess tumour cellularity. Assessment is done visually or quantitatively. Quantitative measurements require Region of Interest (ROI) positioning on...
Read more Conclusion Radiologists must be aware of and actively search for “red flags” of SGTs on multiparametric MRI to avoid missing malignancy, which drastically changes the therapeutic approach. Correlation with US and US-FNAC is useful, increasing the diagnostic accuracy in non-typical MRI cases.
Read more References Åžahin, M. M., Çayönü, M., CILIZ, D. S., Tuna, E. E. Ü., DÄ°NÇ, A. S. K., BoynueÄŸri, S., ERYILMAZ, A. (2019). Magnetic Resonance Imaging versus Fine Needle Aspiration Biopsy in the Differential Diagnosis of Neoplastic Parotid Gland Lesions. ENT Updates, 9(1), 38-43. Gökçe, Erkan, and Murat Beyhan. “Advanced magnetic resonance imaging findings in salivary gland tumors.” World journal of radiology  14,8 (2022): 256-271. Coudert, H., Mirafzal, S., Dissard, A., Boyer, L., & Montoriol, P. F. (2021). Multiparametric magnetic resonance imaging of parotid tumors: A systematic...
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