Oral squamous cell carcinoma in patients twenty years of age or younger--review and analysis of 186 reported cases.

To review the literature on reported cases of squamous cell carcinoma (SCC) of the oral cavity in patients twenty-years-of-age or younger. All well-documented cases of oral SCC in patients twenty-years-of-age or less, published between 1936 and 2012, were collected and the clinicopathologic features were evaluated. Primary cases of oral SCC were selected. Age, gender, intra-oral subsite were recorded. A total of 88 articles describing 186 cases were included. The group of otherwise healthy patients had a mean age of 14.08years (range newborn-20years), the m:f ratio was 1.36; the oral subsites were the tongue, gingiva, and lower lip. A second group of patients who have disorders that predispose to cancer development, such as xeroderma pigmentosum, Fanconi's anemia, and a history of bone marrow transplant, had a mean age of 13.17years (range 5-20years); the m:f ratio was 1.23; the oral subsite was mainly the tongue. There was a slight difference between otherwise healthy patients and patients with predisposing systemic factors, but this difference was not statistically significant. It contrast to adults, there is only a weak predilection for males (m:f ratio of 1.23-1.36). In the young population SCC occurs most frequently in the tongue, followed by gingiva and lips. Unlike in adults, SCC is very uncommon in the floor of mouth. Oral SCC may, indeed, occur in patients younger than 20years and clinicians should take cognizance of this. Periodical examination of the oral cavity of young patients is recommended in cases of systemic diseases that predispose to cancer development such as xeroderma pigmentosum, Fanconi's anemia, and a history of bone marrow transplant.