At the floor of the mouth, various types of pathological lesions may arise. Their diagnosis and differentiation are of significant clinical importance due to different course of the disease and treatment methods. This article presents a case of a 17-year-old female patient who has been diagnosed with a dermoid cyst by accident. Differential diagnosis due to a similar morphology of the lesion involved mainly a ranula. A complete resection of the lesion was performed. Histopathological examination showed a dermoid cyst, which is a rare lesion in this location.
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