On CT scan, characteristic findings of mucoepidermoid carcinoma include: well-circumscribed masses, usually with cystic components (low-grade tumors), enhancements of solid components, and calcification. High-grade tumors have poorly defined margins, infiltrate locally, and appear solid.

• CT findings associated with mucoepidermoid carcinoma include:^[1]

• Well-circumscribed masses, usually with cystic components (low-grade tumors)
• Poorly defined margins, infiltrate locally and appear solid (high-grade tumors)

• Low-grade tumors were intraluminal homogeneous nodules or masses with or without obstructive change
• Some low-grade mucoepidermoid carcinoma are lobular heterogeneous masses containing multilobular cystic structures filled with low-attenuation fluid
• Multiple punctate or coarse calcifications.^[2]

• CT scanning and MRI are helpful in distinguishing an intraparotid deep-lobe tumor from a parapharyngeal space tumor and for evaluation of cervical lymph nodes for metastasis.^[2]

• Other CT findings associated with mucoepidermoid carcinoma include:

• Calcifications
• Enhancement of solid components^[3][4]