MedGen

A benign or malignant neoplasm that affects the parotid gland. Representative examples of benign neoplasms include Warthin tumor, monomorphic adenoma, and pleomorphic adenoma. Representative examples of malignant neoplasms include carcinoma, lymphoma, and sarcoma. [from NCI]

A neoplasm arising from the epithelium. It may be encapsulated or non-encapsulated but non-invasive. The neoplastic epithelial cells may or may not display cellular atypia or dysplasia. In the gastrointestinal tract, when dysplasia becomes severe it is sometimes called carcinoma in situ. Representative examples are pituitary gland adenoma, follicular adenoma of the thyroid gland, and adenomas (or adenomatous polyps) of the gastrointestinal tract. [from NCI]

An adenoma characterized by an oncocytic, often papillary, epithelial component, dense lymphoid stroma, and cystic spaces. It occurs primarily in the parotid gland, and is the second most common benign parotid salivary gland tumor. A strong association with smoking has been reported. It typically presents as a painless swelling in the lower portion of the parotid gland. [from NCI]

A rare tumor of salivary glands characterized by a benign, well-circumscribed, slow-growing, painless mass most commonly occurring in the parotid gland (but also the palate, submandibular gland, or nasal septal mucosa), histopathologically composed of epithelial and myoepithelial / stromal components. Possible signs and symptoms depend on the location of the tumor and include facial nerve weakness, mild dysphagia, or unilateral nasal obstruction. Recurrence rates are low, although tumor rupture and spillage have been reported. Malignant transformation may occur in a small percentage of cases. [from ORDO]

A malignant neoplasm composed of glandular epithelial clear cells. Various architectural patterns may be seen, including papillary, tubulocystic, and solid. [from NCI]

A tumor (abnormal growth of tissue) of the oral cavity. [from HPO]

A disease involving the parotid gland. [from MONDO]

A tumor (abnormal growth of tissue) of a salivary gland. [from HPO]

A neoplasm that arises from the parotid gland and is characterized by the absence of atypical or malignant cytological and architectural features, and absence of invasive features or metastatic potential. Representative examples include Warthin tumor, monomorphic adenoma, pleomorphic adenoma, and lipoma. [from NCI]

An adenoma characterized by the presence of papillary epithelial patterns. [from NCI]

A usually aggressive malignant epithelial neoplasm composed of cells with significant cytologic atypia and nuclear pleomorphism. [from NCI]

A primary or metastatic malignant neoplasm involving the parotid gland. Representative examples include carcinoma, malignant mixed tumor, and non-Hodgkin lymphoma. [from NCI]

A carcinoma that arises from a pleomorphic adenoma in the salivary glands. It usually originates in the parotid gland. Patients usually present with a history of a long-standing tumor mass which grew rapidly in the past few months. Patients with non-invasive or minimally invasive carcinoma have an excellent prognosis. In cases where there is invasion of the surrounding tissues, the clinical course is aggressive. [from NCI]

A carcinoma that arises from the parotid gland. It usually presents as a firm and painless mass. It is characterized by the presence of epidermoid cells, mucus producing cells, and cells of intermediate type. It usually spreads to pre-auricular lymph nodes. The majority of cases have a favorable outcome. [from NCI]

A rare neoplastic disease with the presence of a neoplasm located in the parotid, sublingual, submandibular and/or minor salivary glands. The disease presents with a wide spectrum of clinical features depending on the location, size and type of salivary gland involved, ranging from clinically asymptomatic, slow-growing, painless mass(es), that may or may not be fixed to underlying skin or muscles, to rapidly growing mass(es) associated with pain, facial weakness/nerve palsy, dysphagia, palatal/parapharyngeal fullness, nasal obstruction/bleeding, voice hoarseness/change, trismus, palate bone erosion, telangiectasia, mucosal/skin ulceration and/or cervical adenopathy. [from SNOMEDCT_US]