Adenomatoid odontogenic tumor (AOT)is an uncommon tumor of odontogenic origin with a relative frequency of 2.2 -7.1%. As the histogenesis of AOT is still uncertain, it is sometimes categorized as a hamartomatous lesion rather than a true neoplasm. We report a case of AOT in the right maxillary anterior region in a 20-year-old woman. The tumor showed some unusual and aggressive features that suggested it was a true neoplasm. (J Oral Sci 51, 155-159, 2009)

Solitary fibrous tumors (SFTs) are rare spindle cell neoplasms that originate from mesothelial-lined surfaces, mainly the pleura and peritoneum. SFT is a distinctive mesenchymal neoplasm of the pleura but can be found in extrapleural sites. The treatment of SFT is simple excision or wide local resection. This is the case study of a 14-year-old girl who presented with a large diffuse swelling in the left submandibular region, ultimately diagnosed with SFT and surgically excised.

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Peripheral odontogenic fIbroma (POF) is a rare odontogenic tumor. It resembles clinically with other peripheral exophytic lesions like pyogenic granuloma, peripheral ossifying fibroma, and peripheral giant cell granuloma. Hence, needs to be differentiated from such other lesions. Histopathological examination being the only diagnostic approach for peripheral odontogenic fibroma, which can provide a basis for treatment and prognosis evaluation. This case report presents a rare clinical case of a 14-year-old female patient with a palatal overgrowth along the maxillary incisors, which was diagnosed as peripheral odontogenic fibroma.