Objectives: The objective of this study was to analyze the frequency and distribution of odontogenic tumors (OTs) in the Cappadocia region of Turkey, and to compare the findings with those reported in the literature. Study Design: The records of the Oral and Maxillofacial Surgery and Pathology Departments at Erciyes University, with histologic diagnosis of odontogenic tumors (based on the World Health Organization classification, 2005), over a 12-year period, were analyzed. The relative frequency of different types of tumors was also analyzed and compared with the literature. Results: OTs in the present study constituted 2.74% of all the 7,942 registered biopsies. A total of 218 cases of OTs were collected and reviewed. Of these, (94.04%) were benign and (5.96%) were malignant. The mandible was the most commonly affected anatomic location, with 170 cases (77.9%). Ameloblastoma with a predilection for the posterior mandible was the most frequent odontogenic tumor (30.28%), followed by keratocystic odontogenic tumor (19.5%), odontoma (13.4%), and odontogenic myxoma (8.5%). Conclusions: OTs are rare neoplasms and appear to show geographic variations in the world. In Cappadocia, Turkey, they are more common in the mandible, with ameloblastoma followed by keratocystic odontogenic tumors with the incidences observed in the present study being similar to those of previous studies from Asia and Africa, and in contrast to those reported from American countries. Key words:Odontogenic tumors, WHO classification, prevalence, jaws.

Objective: To evaluate the histopathological results of cases who presented with an eyelid mass and underwent mass excision. Methods:The histopathological results of 107 cases, who underwent eyelid mass excision between May 2011 and March 2014 were retrospectively analyzed. Age and sex, mass localization, operative technique, and histopathological results were recorded.Results: Of 107 subjects included in the study, 61 were male and 46 were female, with a mean age of 49.44±19.81 years. The distribution of benign eyelid tumors were as follows: 37 (37.8%) squamous papillomas, 19 (19.4%) intradermal nevus, 9 (9.2%) seborrheic keratosis, 7 (7.1%) epidermal inclusion cyst, 6 (6.1%) inflammatory lesions, 5 (5.1%) suderiferous cysts, 5 (5.1%) capillary hemangiomas, 3 (3.1%) xanthelasma, 3 (3.1%) fibromas, 1 (1.0%) moll gland cyst, 1 (1.0%) chondroid syringoma, 1 (1.0%) dermoid cyst, and 1 (1.0%) actinic keratosis. Malignant eyelid tumors included 8 (88.9%) cases of basal cell carcinomas and 1 (11.1%) squamous cell carcinoma. Conclusion:In this study squamous papilloma was the most common benign eyelid tumor followed by intradermal nevus. Basal cell carcinoma was the most common malignant eyelid tumor followed by squamous cell carcinoma.

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Objectives: The present study was aimed at advancing the understanding of the pathogenesis of cherubism by presenting a case study based on history, physical examination, typical radiological features, molecular and histopathological laboratory tests and a review of the literature. Study Design: This study began with a 7-year-old boy who was referred due to mandibular overgrowth. A panoramic radiograph revealed multilocular radiolucent lesions of the upper/lower jaws suggestive of cherubism. Overall, a total of four family members were tested for SH3BP2 mutations, namely two siblings and their parents. Both siblings had been clinically diagnosed with cherubism; however, the parents were clinically normal. Peripheral blood was collected from all participants and genomic DNA sequencing was carried out. Results: A missense mutation was found in the two affected siblings and their asymptomatic mother. The mutation was a 1244 G>A transversion which resulted in an amino acid substitution from arginine to glutamine (p.Arg415Gln) in exon 9. Conclusions: The present study emphasized the importance of further clinical and molecular investigation even when only a single case of cherubism is identified within a family. Genotype-phenotype association studies in individuals with cherubism are necessary to provide important insights into the molecular mechanisms associated with this disease. Key words:Cherubism, mandible, maxilla, SH3BP2, gene analysis, CBCT.

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