Document Detail

MR imaging of benign and malignant lesions in the buccal space.
MedLine Citation:
PMID:  12424631     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: To evaluate MRI characteristics of buccal space lesions and to discuss the sensitivity of MRI in predicting malignancy of those lesions. METHODS: Thirty patients with malignant (n=7) or benign (n=23) lesions originating in the buccal space were reviewed retrospectively. MR images were assessed for the margins, internal architecture, signal intensity of lesions and their relation to the surrounding structures. RESULTS: Two cases of soft tissue sarcoma were shown as ill-defined masses with infiltration into adjacent muscles and bone. On the other hand, all tumors of minor salivary gland origin, whether malignant (n=4) or benign (n=2), were well-defined and confined within the buccal fat pad without infiltration into surrounding structures. All haemangiomas (n=9) had very high T2-weighted signal intensity. Three out of them contained signal voids on all sequences thought to represent phleboliths, a finding strongly suggestive of the diagnosis. Inflammatory lesions were characterized by the presence of edema in the surrounding fat. When ill-defined margins, infiltration into muscles and bone destruction were used as the criteria for the malignancy, only two out of seven malignant tumors were correctly diagnosed (sensitivity 29%). CONCLUSIONS: Although MR imaging was useful in demonstrating the extent of buccal space lesions, its diagnostic value in predicting malignancy was very limited. It was especially true for malignant tumors of minor salivary gland origin, which were typically seen as well-defined masses without infiltration into surrounding structures on MRI.
T Kurabayashi; M Ida; A Tetsumura; N Ohbayashi; M Yasumoto; T Sasaki
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Dento maxillo facial radiology     Volume:  31     ISSN:  0250-832X     ISO Abbreviation:  Dentomaxillofac Radiol     Publication Date:  2002 Nov 
Date Detail:
Created Date:  2002-11-08     Completed Date:  2003-04-15     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7609576     Medline TA:  Dentomaxillofac Radiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  344-9     Citation Subset:  D    
Oral and Maxillofacial Radiology, Graduate School, Tokyo Medical and Dental University, Japan.
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MeSH Terms
Adipose Tissue / pathology
Cheek / pathology*
Contrast Media
Edema / pathology
Facial Bones / pathology
Facial Muscles / pathology
Facial Neoplasms / diagnosis*,  pathology
Gadolinium DTPA / diagnostic use
Hemangioma / diagnosis,  pathology
Lithiasis / diagnosis
Magnetic Resonance Imaging*
Mouth Neoplasms / diagnosis*,  pathology
Neoplasm Invasiveness
Retrospective Studies
Salivary Gland Neoplasms / diagnosis,  pathology
Salivary Glands, Minor / pathology
Sarcoma / diagnosis,  pathology
Sensitivity and Specificity
Vascular Diseases / diagnosis
Reg. No./Substance:
0/Contrast Media; 80529-93-7/Gadolinium DTPA

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