RELIABILITY OF MRI IN MEASURING TONGUE TUMOUR THICKNESS: A 1.5T STUDY

Usman Bashir, Muhammad Usman Manzoor, Yasir Majeed, Rizwan Ullah Khan, Usman Hassan, Ahmed Murtaza, Khurram Aftab, Syed Raza Hussain, Arif Jamshed, Najam Uddin, Zia Salman Faruqui

Abstract


Background: Tongue tumour thickness has been shown to have a correlation with neck nodal
metastasis and hence patient survival. Current AJCC guidelines recommend inclusion of tongue tumour
thickness measurement in routine radiologic staging. Several studies have attempted to define the
accuracy of MRI in measuring tongue tumour thickness. The aim of our study was to compare tongue
tumour thickness measured at T2-weighted and STIR sequences with histologic tongue tumour
thickness. Methods: Twenty-eight consecutive patients of tongue cancer who had undergone
glossectomy were selected retrospectively. Tumours were measured in both STIR axial and T2-
weighted coronal images and compared with histologic tumour thickness on resected specimens.
Pearson’s analysis was performed to determine the degree of correlation. Paired samples t-test was also
used for comparison of mean tumour thicknesses measured on MRI with mean histologic tumour
thickness. Results: Pearson correlation analysis showed good correlation of tumour thickness measured
on MRI with actual histologic tumour thickness (R=0.876). Conclusion: MRI provides a satisfactory
prediction of tongue tumour thickness which in turn can be used to determine the need for elective neck
dissection in these patients.
Keywords: Lymphatic Metastasis, Magnetic Resonance Imaging/methods, Tongue Neoplasms

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