Introduction: Distant metastases of mucoepidermoid carcinoma (MEC) are reportedwith the most common sites being the soft tissue of skin, lung, liver, and bone. Wereport here a very rare case of MEC with multiple metastases to the kidney, adrenalgland, skull and gluteus maximus muscle.
Case report: A 63-year-old male patient presented with left-sided headache.
Radiologic evaluations including CT and MRI showed ill-defined soft tissue lesioninvolving the left infratemporal fossa and left sphenoid sinus, and multiple enlargedlymph nodes in neck and mediastinum. PET-CT demonstrated multiple hypermetaboliclesions in and around the left kidney, left adrenal gland, right ischium, right gluteusmaximus and skull base. These lesions were confirmed as MEC with multiplemetastases through biopsy.
Discussion: Only one case of metastasis to the skull has been previously reported,and moreover, there has not been a case of metastatic MEC to the kidney, adrenalgland and gluteus maximus muscle so far in the medical literature. It is important toacknowledge the possibility of every unusual MEC metastases, since the presence ofmetastasis has statistically significant influence on the survival of MEC.