Abstract
Squamous cell carcinoma (SCC) represents the main malignancy of oral mucosa and lips and is the sixth most common cancer in the world. The tongue is the most common anatomical site. Microinvasive carcinoma is an early-stage, relatively thin tumor, without invasion of deep tissues. The objective of this work is to report a case of microinvasive SCC and present its clinical characteristics, emphasizing early diagnosis and clinical management. A 64-year-old male patient reported a "sore on the tongue that doesn't heal." The clinical examination demonstrated 2 white plaques on the lateral border of tongue associated with an erythematous area (atrophic). The diagnostic hypotheses were erosive lichen planus and lichenoid reaction. Incisional biopsies were performed, and histopathologic reports revealed microinvasive SCC. The patient was referred for treatment. Because microinvasive lesions tend to present clinically as premalignant lesions, accurate clinical examination is essential if misdiagnosis of early lesions is to be avoided.
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