Ameloblastomas are tumors of odontogenic epithelial origin. The term unicystic ameloblastoma is used to describe cystic lesions with clinico-radiographic features resembling an odontogenic cyst, but histologically showing the presence of ameloblastomatous epithelium lining part of the cyst cavity. A large majority of lesions are found in the mandible, and usually cause a painless swelling of th...

REVIEW OF THE LITERATURE The OKC is a clinically aggressive keratinizing epitheliallined cyst of the jaw. Phillipsen (1) first used the term ‘odontogenic keratocyst’, and it was described as a distinct entity by Shear in 1960 (2). Shear (2) and Pindborg and Hensen (3) subsequently documented its typical histological features. The majority of cysts grow slowly and asymptomatically at the expense...

OBJECTIVE To determine the distribution of odontogenic cysts diagnosed histologically over a period of 38 years in a Brazilian population according to age, gender and site affected and to compare these data with previously reported studies from other countries. STUDY DESIGN A total of 1019 cases of odontogenic cysts diagnosed between 1970 and 2007 were studied. Clinical features obtained from...

The pattern of distribution and expression of laminin and type IV collagen was studied in ten radicular cysts, ten dentigerous cysts and ten odontogenic keratocysts, by means of the streptavidin-biotin method. The purpose of this study was to investigate changes in the distribution of components of the basement membrane in an attempt to contribute to the understanding of the differences, as to ...

Primary epithelial tumours in the jaw are an interesting group in that they may be derived from the lining epithelium of the mouth or from that which has invaded the jaw during' the embryonic development of the teeth. The exact origin of these tumours is often debatable, their diagnosis radiologically and histologically not always easy, and their prognosis therefore in doubt. The morphological ...

peripheral calcifying cystic odontogenic tumor (pccot) is a rare odontogenic lesion, which represents about 1% of jaw cysts. here we report clinicopathologic, radiographic and ct scan images of a new case of recurrent large pccot located in mandibular gingiva in a 77-year-old male with history of a nodular mass in the same area, which had been completely excised 3 years ago. in reviewing the li...

Gorlin-Goltz syndrome is an infrequent multi-systemic disease which is characterized by multiple keratocysts in the jaws, calcification of falx cerebri, and basal cell carcinomas. We report a case of Gorlin-Goltz syndrome in a 23-year-old man with emphasis on image findings of keratocyctic odontogenic tumors (KCOTs) on panoramic radiograph, computed tomography, magnetic resonance (MR) imaging, ...

Giant cell tumor (GCT) of bone is a giant-cell-rich bony lesion associated with abundant multinucleated osteoclast-type giant cells. It is a primary neoplasm of bone with characteristic clinical, radiological, and pathological features. It is an expansive and lytic lesion without periosteal reaction and prominent peripheral sclerosis. Giant cells are also seen in other diseases like giant cell ...