Presentation on theme: "USEFULNESS OF MRI IN THE DIAGNOSIS OF SALIVARY GLAND PATHOLOGIES"— Presentation transcript:
1 USEFULNESS OF MRI IN THE DIAGNOSIS OF SALIVARY GLAND PATHOLOGIES Abstract id : Iria-1099
2 INTRODUCTION MAJOR SALIVARY GLAND MINOR SALIVARY GLANDS -PAROTID,SUBMANDIBULAR,SUBLINGUALMINOR SALIVARY GLANDSNUMEROUS SCATTERED THROUGHOUT UPPER AERODIGESTIVE TRACT.SALIVARY GLAND PATHOLOGIESBENIGN NON NEOPLASTICBENIGN NEOPLASTICMALIGNANT.
3 INTRODUCTION ULTRASOUND CT MRI Cheaper, widely availablefine-needle aspiration (FNA) and biopsy.CTRadio- dense calculiMRISuperficial /deep parts and the facial nerve .To evaluate minor salivary gland diseasePerineural spread or skull base involvement of tumorDeep spaces involvement for surgical assessment .Thin slices (3D FIESTA) – ducts can be studied .
4 AIMTo assess the usefulness of MRI in the diagnosis of salivary gland pathologies.
5 84 pts with parotid gland tumors were studied. REVIEW OF LITERATURE MR Imaging of Parotid Tumors: Typical Lesion Characteristics in MR Imaging Improve Discrimination between Benign and Malignant Disease84 pts with parotid gland tumors were studied.Histology was available for all tumors.MR imaging parameters analyzed were:signal intensity,contrast enhancement,lesion margins (well-defined versus ill-defined),lesion location (deep/superficial lobe),growth pattern (focal, multifocal, or diffuse), andextension into neighbouring structures,perineural spread,Lymphadenopathy.Christe C. Waldherr R. Hallett P. Zbaeren H. ThoenyAJNR Am J Neuroradiol 32:1202–07 Aug 2011
6 Low signal intensity on T2-weighted images and postcontrast ill-defined margins of a parotid tumor are highly suggestive of malignancy.
7 MATERIALS AND METHODS Prospective study, May 2013- Oct 2014 24 Patients with suspected salivary gland disease5 Excluded as follow up was not availableMRI findings correlated with clinical follow up (10) and surgical/ histopathological diagnosis(9) in 19 pts
8 TECHNIQUE Procedure – Head first, Head neck coil, Scan covers salivary gland and neck regionAXIAL– T1, T2, T2 FS,DIFFUSION,CISS,GRADIENT .CORONAL STIRSAGITTAL T2 weighted images
16 24 YEAR MALE WITH PAROTITIS Diffusely enlarged superficial and deep lobes of parotidT 1 hypointenseT2 hyperintense
17 45 YEAR OLD MALE WITHPAROTID CYSTWell CircumscribedT1 hypointenseT2 hyperintense lesion
18 solid and cystic components. T1 isointense to muscles T2 hyperintense 23 YEAR OLD FEMALE WITH HAEMANGIOENDOTHELIOMAwell defined lesionsolid and cystic components.T1 isointense to musclesT2 hyperintense
19 Well circumscribed T1 hypointense T2 hyperintense mass smooth margins 38 YEAR OLD MALE WITHPLEOMORPHIC ADENOMAWell circumscribedT1 hypointenseT2 hyperintense masssmooth margins
20 52 YEAR OLD FEMALE WITHSUBMANDIBULAR LIPOMAWell circumscribedT1 HyperintenseT2 HyperintenseSaturates on fat saturated sequences
21 CORRELATIONChristie et al found 70% accuracy in diagnosing benign parotid lesions and 36% in malignant lesions.Our study showed an accuracy of 95% in diagnosing salivary gland pathologies.
22 CONCLUSIONThere are certain MRI characteristics for each of the common salivary gland pathologies which helps in the exact diagnosis.MRI showed an accuracy of 95% in diagnosis of salivary gland pathologies.Hence MRI is an extremely useful in the diagnosis of salivary gland pathologies.