• Parotid gland- Parotid salivary gland is situated at the root of the ear lobe. The facial nerve which supplies the muscles of facial expression is under the gland. Among all the salivary glands, Parotid has the highest incidence of tumours. To diagnose parotid swellings, ultra sound scanning and fine needle aspiration biopsy helps. Sometimes CT and MRI scans are done to decide the depth of tumour and the spread to the surrounding tissue.