Clinical History
Probable malignant tumour of the left gingiva.
Imaging Findings
This patient presents with a 3 cm
lesion of the left retromolar trigone
Discussion
After Gd DOTA injection (1c,1d), the natural contrast
between the tumour (hyposignal) and the surrounding fat
tissues (hypersignal) is partly cancelled owing to tumour
enhancement. So the pre-contrast T1 sequence (1a,1b) or an
adequately fat-suppressed sequence are necessary.
The fat suppression slices (2a,2b) allow to better
visualise the tumour lying in a fat area. In addition,
abnormalities of the bone marrow are shown.
In this case, there is a hypersignal into the ascending
branch of the mandible, suspect of tumour invasion.
No involvement of the masticator space is seen.
Differential Diagnosis List
SCC of the left retromolar trigone
Final Diagnosis
SCC of the left retromolar trigone