RESUMEN
Objectives: the purpose of this study was to determine the frequency of all odontogenic cysts [OCs] along with age range, gender distribution, and the site of involvement over a 10-year period [March 2001 to March 2011] and to compare these data with findings from other surveys
Methods: the archives of departments of oral and maxillofacial pathology from Shahid Beheshti and Tehran University of Medical Sciences were retrieved and analyzed for demographic data such as age, gender, location and histopathological diagnosis of OCs
Results: of the 8,563 biopsy samples that were received, 1,518 [17.7%] were diagnosed as OCs. Radicular cyst was the most common diagnosis [33.2%], followed by dentigerous cysts [24.1%], and odontogenic keratocysts [18.6%]. OC occurred 59.3%, 40.6% in male and female respectively. Mandibular involvement was 62.4% while in maxilla was 37.6%
Conclusion: our study provided demographic data on a large series in Iran, a Southwest Asian country. In our study, radicular cysts, the most common OC, had a lower frequency compared to that reported in most other studies. On the other hand, calcifying OCs seem to be more prevalent in the Iranian population compared to other populations male to female to female ratio was 1.45:1
RESUMEN
Nucleolar organizing regions [NORs] are loops of rDNA, which in humans, occur on the short arms of five acrocentric chromosomes, namely, 13, 14, 15, 21, and 22. NORs are usually demonstrated by binding their associated proteins [NORAPs] to silver [Ag+] ions. The reaction is called AgNORs. It has been determined that the number and the size of NORs are related to the proliferative activity and grade of malignancy. The purpose of this study was to determine the value of AgNOR method in assessment of the grade of malignancy in non-Hodgkin's lymphoma [NHL] of the head and neck. Forty-one cases of paraffin embedded specimens of NHL, classified by the working formulation system, were selected and then examined by the AgNOR method. AgNORs were enumerated for all 41 cases of NHL [Standard Crocker]. The mean AgNORs in 11 cases of low-grade, 15 cases of intermediate-grade and 15 cases of high-grade NHL was 1.66 [SEM = 0.098], 2.52 [SEM = 0.084], and 5.19 [SEM = 0.11], respectively. Through the analysis of variance and multiple comparison, a significant difference was found between the three groups of NHL [P < 0.0001]. AgNORs is a reliable method, which could be used in grading of NHL in the head and neck area