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,SUBLINGUAL
MINOR SALIVARY GLANDS
NUMEROUS SCATTERED THROUGHOUT UPPER AERODIGESTIVE TRACT.
SALIVARY GLAND PATHOLOGIES
BENIGN NON NEOPLASTIC
BENIGN NEOPLASTIC
MALIGNANT.

3. INTRODUCTION ULTRASOUND CT MRI
Cheaper, widely available
fine-needle aspiration (FNA) and biopsy. CT
Radio- dense calculi
MRI
Superficial /deep parts and the facial nerve .
To evaluate minor salivary gland disease
Perineural spread or skull base involvement of tumor
Deep spaces involvement for surgical assessment .
Thin slices (3D FIESTA) – ducts can be studied .

4. AIM
To 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 Disease
84 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), and
extension into neighbouring structures,
perineural spread,
Lymphadenopathy.
Christe C. Waldherr R. Hallett P. Zbaeren H. Thoeny
AJNR 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 disease
5 Excluded as follow up was not available
MRI 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 region
AXIAL– T1, T2, T2 FS,DIFFUSION,CISS,GRADIENT .
CORONAL STIR
SAGITTAL T2 weighted images

9. RESULTS

10. PAROTID PATHOLOGY

11. SUBMANDIBULAR GLAND PATHOLOGY

12. BENIGN NON NEOPLASTIC
PAROTITIS
PAROTID CYST
AVM OF PAROTID
BILATERAL PAROTID MICROABSCESSES
RECURRENT SIALADENITIS
BENIGN NEOPLASTIC
PLEOMORPHIC ADENOMA
SUBMANDIBULAR LIPOMA
HAEMANGIOENDOTHELIOMA

13. DIAGNOSIS
MRI
FINAL
Parotitis 10
Pleomorphic adenoma 3 2
Parotid cyst 1
AVM of parotid
Lymphoma
Haemangioendothelioma
Recurrent sialadenitis
Bilateral parotid microabscesses
Submandibular lipoma

15. DISCUSSION

16. 24 YEAR MALE WITH PAROTITIS
Diffusely enlarged superficial and deep lobes of parotid
T 1 hypointense
T2 hyperintense

17. 45 YEAR OLD MALE WITH
PAROTID CYST
Well Circumscribed
T1 hypointense
T2 hyperintense lesion

18. solid and cystic components. T1 isointense to muscles T2 hyperintense
23 YEAR OLD FEMALE WITH HAEMANGIOENDOTHELIOMA
well defined lesion
solid and cystic components.
T1 isointense to muscles
T2 hyperintense

19. Well circumscribed T1 hypointense T2 hyperintense mass smooth margins
38 YEAR OLD MALE WITH
PLEOMORPHIC ADENOMA
Well circumscribed
T1 hypointense
T2 hyperintense mass
smooth margins

20. 52 YEAR OLD FEMALE WITH
SUBMANDIBULAR LIPOMA
Well circumscribed
T1 Hyperintense
T2 Hyperintense
Saturates on fat saturated sequences

21. CORRELATION
Christie 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. CONCLUSION
There 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.