<prompt> A Warthins tumour is:An adenolymphoma of parotid glandA pleomorphic adenoma of the parotidA carcinoma of the parotid.A carcinoma of submandibular salivary gland  <response>: Ans. is a i.e. An adenolymphoma of parotid gland Warthins tumourIt is also called papillary cystadenoma lymphomatosum because, histologically it consists of papillary cystic pattern with marked lymphoid component.Other important characteristics of Warthins tumour.2nd most common benign tumour of parotid gland Ist is pleomorphic adenomaThey are usually cysticTypically occur in 6th and 7th decadesMore common in malesBL in about 10Histological feature : -Consists of papillary cystic pattern with marked lymphoid component.Unlike all other neoplasms which form a cold spot the adenolymphoma produces a hot spot in a 99mTc - pertechnetate scan, so that a firm preoperative diagnosis is possible without biopsy. 