Merino DF, Martín MP, López FP, Zafra VV, Salvador AE, et al. (2018) Advanced MRI Sequences (Diffusion and Perfusion): Its Value in Parotid Tumors. Int Arch Oral Maxillofac Surg 2:010.


© 2018 Merino DF, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

RESEARCH ARTICLE | OPEN ACCESS DOI: 10.23937/iaoms-2017/1710010

Advanced MRI Sequences (Diffusion and Perfusion): Its Value in Parotid Tumors

Merino Domingo F1*, Martín Medina P2, López Fernández P1, Zafra Vallejo V1, Salvador Álvarez E2, Gutiérrez Díaz R1, Sánchez Aniceto G1 and Ramos A2

1Oral and Maxillofacial Department, Hospital 12 de Octubre, Spain

2Radiological Department, Hospital 12 de Octubre, Spain



Tumors of salivary glands constitute 3% of neoplasms of the body. Clinical signs and symptoms usually occur in tumors at advance stages. Dynamic-contrast-enhanced and diffusion-weighted MR sequences have been described as useful diagnostic tools in other locations. Our goal is to evaluate the utility of these techniques for parotid tumors.

Material and methods

We retrospectively reviewed the Parotid tumors operated by our department whit Dynamic-contrast-enhanced and diffusion-weighted MR sequences between 2012 and 2015. We correlate the results with the final histopathological diagnosis.


From 44 parotid tumors studied, Warthin tumors were the most common (43%). They showed high enhancement and high washout in perfusion series, so as low ADC values. Pleomorphic adenomas (41%) are hyperintense tumors in T2, with moderate constant enhancement in perfusion and high Apparent Diffusion Coefficient values. It is not possible to establish consistent results for malignant tumors given their underrepresentation in this sample.


Advanced MRI techniques contribute to the differential diagnosis of parotid tumors. Perfusion is useful in diagnosis of Warthin tumors and Pleomorphic adenomas. There is greater overlap in other tumors, for which diffusion-weighted MR sequences can help in discriminating malignancies. Both malignancies and Warthins show low Apparent Diffusion Coefficient values.