lip and oral cavity squamous cell carcinoma (MONDO_0044710) is a squamous cell carcinoma arising from the lip or the oral cavity. The oral cavity squamous cell carcinoma usually arises from the buccal mucosa, tongue, or gums. It occurs predominantly in adults who use tobacco and alcohol and has a tendency to metastasize early to lymph nodes. Also known as: lip and oral cavity squamous cell cancer, lip/oral cavity squam. cell car..