<prompt> Answer this question truthfullyWhat is the significance of a mucoepidermoid carcinoma in a CT scan?  <response>: <reason> 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: Well-circumscribed masses, usually with cystic components low-grade tumors Poorly defined margins, infiltrate locally and appear solid high-grade tumorsLow-grade tumors were intralumina l 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. 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. Other CT findings associated with mucoepidermoid carcinoma include:Calcifications Enhancement of solid components 