background : stomach cancer is one of the most common malignancies worldwide. in iran, the mortality of stomach cancer is the first cause of death due to cancer in both sexes. this study was designed to estimate survival rate of stomach cancer at national level. methods : from the national cancer registry file, 3439 cases of stomach cancer that had telephone number and were diagnosed between ye...

PURPOSE Peripheral T-cell lymphoma, unspecified (PTCL-U) comprises histopathologically and clinically heterogeneous groups. The purpose of this study was to identify subgroups with distinct genetic, histopathologic, and prognostic features. EXPERIMENTAL DESIGN We used array comparative genomic hybridization (CGH) for high-resolution analysis of 51 PTCL-U patients and the array data for examin...

background and aims. well-differentiated chondrosarcoma and enchondroma are similar in histopathologic aspects; therefore, special methods should be used to make a distinction between these benign and malignant tumors. the aim of this study was to evaluate the efficacy of a histopathologic method in the long-term follow-up for differentiating these lesions. materials and methods. the medical re...

background there is evidence of a possible etiological role of human papillomaviruses (hpvs) in the development of colorectal cancer. loss of p53 tumor suppressor gene function has been found in many malignancies and it can occur in a variety of ways, including gene mutation and interaction with the e6 protein of oncogenic hpvs. the objective of this study was to determine the prevalence of hpv...

Numerous distinct neoplasms are encountered at the anterior cranial base. Management of these primary tumors and their locoregional recurrences are dictated by the histopathologic diagnosis. We present two unusual cases of extra-axial anterior cranial base malignancies with locoregional recurrence where the recurrent tumor encountered was of a distinct histopathologic type. While rare, this rep...

major salivary gland tumors are uncommon and the exact nature of these tumors is not obvious. this study was carried out to compare the histological results of intraoperative frozen sections against those of permanent reports for major salivary glands masses. one hundred thirty-nine patients with major salivary gland masses who were candidates for surgery underwent an intraoperative frozen sect...

PURPOSE To evaluate the classification of punctal stenosis based on the shape of the external punctum, clinical characteristics and histopathologic features. METHODS Patients who experienced tearing and were diagnosed with punctal stenosis were evaluated in this study. Punctal stenosis was classified according to the shape of the lower external punctum, which included membranous type, slit ty...