Recurrent squamous odontogenic tumor: A case report

Objective Introduction: Squamous Odontogenic Tumor (SOT) is exceedingly rare benign odontogenic epithelial neoplasm. Recurrences are exceptional. The present case is the third report of recurrent SOT so far. Method Case report: A 50-year old female presented with a swelling in the mandible. Radiographic images disclosed a radiolucency in premolar area. Local excision was performed. Histopathological analysis revealed a squamous odontogenic tumor. Two recurrences arose at the same localisation, 1 and 4 years later, respectively. Histopathological pattern was in both recurrences identical to the primary tumor. Results Discussion: SOT is extremely rare tumor, around 45 cases having been reported to date. Most of them arose intraosseally, near the periodontal ligament. Recurrence has been described in two cases. The etiology and pathogenesis of the SOT are unknown. Differential diagnosis includes a variety of odontogenic cysts and desmoplastic ameloblastoma. The most important differential diagnosis is intraosseous squamous cell carcinoma (SCC). Conservative surgical procedures are considered adequate treatment for SOT. Conclusion The present case is, to our knowledge, the third report of the recurrent SOT. At least one case of SOT transformed into a carcinoma. Therefore, more extensive surgical excision and a long-term follow-up is essential for such lesions.