Epithelial-myoepithelial carcinoma (EMCa) is a rare malignant tumour that typically arises in a salivary gland and consists of both an epithelial and myoepithelial component. They are predominantly found in the parotid glandand represent approximately 1% of salivary gland tumours.Intermed. mag.High mag. Epithelial-myoepithelial carcinoma (EMCa) is a rare malignant tumour that typically arises in a salivary gland and consists of both an epithelial and myoepithelial component. They are predominantly found in the parotid glandand represent approximately 1% of salivary gland tumours. EMCas are diagnosed by examination of tissue, e.g. a biopsy.