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- Title
MR imaging of squamous cell carcinoma of the floor of the mouth. Appearance of the sublingual and submandibular glands.
- Authors
Murakami, R.; Baba, Y.; Nishimura, R.; Baba, T.; Nakauraa, T.; Ishikawa, T.; Takahashi, M.; Nakaura, T
- Abstract
<bold>Purpose: </bold>To determine the diagnostic value of MR imaging for tumors of the floor of the mouth and the effects of the tumors on the sublingual and submandibular glands.<bold>Material and Methods: </bold>Thirty-seven patients with proven squamous cell carcinoma of the floor of the mouth underwent MR imaging, including unenhanced T1-weighted, T2-weighted, dynamic, and contrast-enhanced T1-weighted images. The appearance of the tumor and the sublingual and submandibular glands was assessed qualitatively and quantitatively.<bold>Results: </bold>All tumors demonstrated replacement of the normal signal intensity in the adjacent sublingual gland. Twenty-one patients (57%) had abnormal signal intensity of the submandibular gland without tumor invasion, presumably secondary to submandibular duct obstruction by the tumor. Unenhanced T1-weighted images provided high contrast between tumor and sublingual gland. Tumors limited within the gland were well detected on unenhanced T1-weighted images. Large tumors extending beyond the gland were well delineated on dynamic images, but no better than on T2-weighted images.<bold>Conclusion: </bold>At MR imaging for tumor of the floor of the mouth, one must carefully evaluate the appearance of the sublingual and submandibular glands. Contrast-enhanced studies are unnecessary when the tumor is limited within the sublingual gland on precontrast MR images.
- Subjects
MAGNETIC resonance imaging; SQUAMOUS cell carcinoma; DIAGNOSIS; MOUTH tumors; MOUTH floor; SUBLINGUAL gland; SUBMANDIBULAR gland; CONTRAST media
- Publication
Acta Radiologica, 1999, Vol 40, Issue 3, p276
- ISSN
0284-1851
- Publication type
journal article
- DOI
10.3109/02841859909175554