Epithelial-myoepithelial carcinoma of the parotid gland, unusual malignancy radiologically simulating a benign lesion: case report
1 Department of Radiology, Civil Hospital of Budrio, Italy
2 Department of Pathology, "S. Maria del Carmine" Hospital, Rovereto, Italy
3 Department of Radiology, "S. Maria del Carmine" Hospital, Rovereto, Italy
4 Department of Pathology, National Institute for Infectious Diseases "L. Spallanzani" IRCCS, Rome, Italy
5 Department of Oncology, "Istituto Dermopatico dell'Immacolata", Rome, Italy
6 Department of Radiology, "S. Salvatore" Hospital, L'aquila, Italy
7 Department of Radiology, Civil Hospital of Bentivoglio, Italy
International Seminars in Surgical Oncology 2007, 4:25 doi:10.1186/1477-7800-4-25Published: 16 October 2007
Ultrasound (US), Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) are widely used in the clinical diagnosis of parotid gland tumors and their efficacy in identifying benign lesions is well documented. However, problems arise when facing some malignant lesions. Only few cases of salivary gland low grade malignant tumors have been previously reported in the literature complete with the radiological features.
We here describe a case of epithelial-myoepithelial carcinoma (EMC) of the parotid gland, a low grade malignant tumor, with spread to an intraparotid lymph node and with CT and MRI findings mimicking a benign lesion.
All the images revealed sharply outlined profiles and a homogeneous enhancement of the nodule, suggesting a benign tumor and demonstrating that a radiological evaluation of the lesion alone may be unsatisfactory and misleading in the diagnosis of salivary gland tumours, especially in the case of low grade malignant tumors, such as EMC.