Abstract
A 47-year-old woman presented with a left jaw lesion prevailing for over 10 years, without painful symptomatology, and with a histopathologic report of odontogenic keratocysts. Extraoral examination did not reveal abnormalities. Intraoral examination showed signs of a previous treatment in the left retromolar region, performed at another service. Computed tomography of the face revealed a hypodense, well-delimited, unilocular lesion in the left mandible body and angle. A conservative surgical treatment was performed, with total enucleation of the lesion, using methylene blue as a bone marker for peripheral osteotomy. Microscopic analysis revealed a thin fibrous wall without inflammatory infiltrate, an epithelial lining composed of a uniform layer of stratified squamous epithelium, and luminal surface showing corrugated parakeratotic flattened epithelial cells. The basal epithelial layer was composed of a palisade layer of colloidal or columnar epithelial cells. The patient is in a 12-month follow-up, with no lesion recurrence.
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