Squamous Odontogenic Tumor: A case report

Squamous odontogenic tumor (SOT) is a rare benign neoplasm with dental origin first described in 1975. Fewer than 40 cases had been reported till now. The SOT may have been originated from epithelial rests of Malassez, but it is suggested in some cases of embeded teeth they may arise from epithelial rests in dental follicle. The purpose of this case report is to show the rarity of this neoplasm and its importance in similarity with acanthomatous Ameloblastoma and well differentiated squamous cell carcinoma. Case Report: The patient is a fifty – four year old man who was referred to surgical department of Mashhad Dental school on July 26, 2003 with buccal expansion and tenderness in right premolars and first molar of mandible. He gave a history of swelling and tenderness at this site for twenty – two years. No significant finding was detected in his past medical history. In clinical examination, buccal expansion in right premolars and first molar of mandible and teeth mobility with moderate periodontitis were observed. Under local anesthesia partial biopsy of the lesion was taken. On microscopic examination, this lesion was diagnosed as SOT. Through next surgical procedure, exisional biopsy and bone curretage was performed (his anterior teeth were also extracted to his own will). Microscopic examination of exisional biopsy confirmed SOT. SOT is a rare neoplasm and this case is the first sample which identified from the beginning in Mashhad dental school up to now.