Figure 10.

Mucosal melanoma of the oral cavity. Axial FDG PET-CT images of the face. (a) At initial diagnosis there is a large, moderately hypermetabolic mass centered in the left submandibular space, medial and lateral to the left mandible (white arrow). There are also multiple involved partially cystic lymph nodes (white arrow). (b) At follow-up on treatment 3 months later, there is progressive enlargement of the mass in the left oral cavity (white arrowhead) and persistent nodal disease (white arrow).