<prompt> Most common cause of unilateral parotid swelling in a 27 yr old male is:Wahins tumorPleomorphic adenomaAdenocarcinomaHaemangioma  <response>: They are the commonest tumors of the parotid gland account for 60 of tumors in the Parotid. Ref: Robbins Basic Pathology, 5th Edition, Page 750; Bailey and Loves Sho Practice of Surgery, 22nd Edition, Page 475 and 23rd Edition, Page 659; CSDT, 11th Edition, Page 294. 