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Lip and oral cavity carcinoma
A carcinoma arising in the lip or oral cavity. Most oral cavity carcinomas are squamous cell carcinomas of the tongue, buccal mucosa, or gums. Less frequent morphologic variants include mucoepidermoid carcinoma and adenocarcinoma. Lip carcinomas are usually basal cell or squamous cell carcinomas. [from NCI]
In situ carcinoma
A malignant epithelial neoplasm which is confined to the epithelial layer without evidence of further tissue invasion. [from NCI]
Dysplasia
A usually neoplastic transformation of the cell, associated with altered architectural tissue patterns. The cellular changes include nuclear and cytoplasmic abnormalities. Molecular genetic abnormalities are also often found and, in some instances, may lead to cancer. [from NCI]
Precancerous condition
A pathological process with signs indicating it may become cancerous. Representative examples include leukoplakia, dysplastic nevus, actinic keratosis, xeroderma pigmentosum, and intraepithelial neoplasia. [from NCI]
Neoplasm of the oral cavity
A tumor (abnormal growth of tissue) of the oral cavity. [from HPO]
Oral cavity carcinoma in situ
A in situ carcinoma that involves the oral cavity. [from MONDO]
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