Teenager with left throat pain and a left throat mass for 3 months

MRI of liposarcoma
Axial (above left) and sagittal (above right) TI MRI without contrast of the face shows a high signal intensity mass in the left pharyngeal and masticator and parotid spaces that is displacing the palatine tonsils and airway. Coronal T1 MRI with contrast with fat supression (below left) and without fat supression (below left) shows the mass to not enhance. The mass follows fat signal on all sequences.

The diagnosis was liposarcoma.