Osteoblastoma of the maxillary sinus is rare. CT assessment must be as precise as possible to avoid confusion with another tumour. The diagnosis can only be confirmed by histological examination. This case report is completed by a review of the literature with description of the main differential diagnoses.
Retropharyngeal liposarcoma is a rare tumour. The authors report the first case of a dedifferentiated histological subtype in this site. A review of the literature completes this case report by providing a description of prognostic factors and the various treatments.
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