<unk>  is a type of benign<unk>  of the salivary glands.  It is also known as benign papillary cystadenoma lymphomatosum.  Its etiology is unknown, but there is a strong association with the cigarette smoking.  Smokers are at 8 times greater risk of developing<unk>  than the general population.<unk>  arises from salivary gland epithelium, which are secretory cells of the salivary gland. On gross pathology, cystic and multicentric appearance are characteristic findings of<unk> . On microscopic histopathological analysis, papillae, fibrous capsule, and cystic spaces are characteristic findings of<unk> .<unk>  must be differentiated from salivary gland cysts, salivary gland lymphoma, and salivary gland cancer. The prevalence of<unk>  is estimated to be 2000 to 2500 cases annually.<unk>  commonly affects elderly patients greater than 60 years old. Males are more commonly affected with<unk>  than females. The male to female ratio ranges from 2.6:1 to 10:1. The most potent risk factor in the development of<unk>  is smoking. Other risk factors include irradiation, Epstein-Barr virus, and alcohol. If left untreated, few patients with<unk>  may progress to develop facial paralysis. Common complications of<unk>  include squamous cell carcinoma and facial paralysis. Prognosis is generally good. The most common symptoms of<unk>  include swollen salivary gland, lump near the back of the lower jaw, jaw pain, the sensation of pressure, facial nerve paralysis, tinnitus, impaired hearing, earache, etc. X-ray, computed tomography (CT) scan and magnetic resonance imaging (MRI) may help diagnosis. Surgery is the mainstay of treatment for<unk> . As a benign<unk> , the prognosis of<unk>  is good.
Warthin's tumor
Krukenberg tumor
Ameloblastoma
Brown tumor
Caroli's disease
Pineocytoma
Neuroma
PEComa