conclusion we constructed and validated a ct colonography phantom with correct density allowing performance of reproducible experiments. materials and methods we found 15 different phantom designs by literature search and compared their advantages and disadvantages based on their description and images. we tested various materials for density and mechanical properties and constructed a phantom ...

aim : the aim of this study was to report the anatomical location and histologic type of colorectal polyps in a large series of iranian patients that attended for colonoscopy. background : polyps that develop through the adenoma-carcinoma pathway are considered neoplastic and may eventually progress to invasive carcinomas. in addition polyps can develop with no neoplastic potential. these neopl...

INTRODUCTION Despite their histological resemblance to colorectal adenocarcinoma, there is some information about the molecular events involved in the pathogenesis of intestinal-type sinonasal adenocarcinomas (ITACs). To evaluate the possible role of TNF-related apoptosis-inducing ligand (TRAIL) gene defects in ITAC, by investigating the immunohistochemical expression of TRAIL gene product in a...

INTRODUCTION Osteoma is a benign tumour, composed of mature compact or cancellous bone, which can arise in any facial bone. Among the paranasal sinuses, the frontal and ethmoid sinuses are most frequently involved. Osteoma grows very slowly and small lesions are often not symptomatic. On the other hand, sometimes patients present with symptoms such as sinusitis, headache or ophtalmologic manife...

The clinical features of 23 cases of fronto-ethmoidal meningoencephalocele are described in two South East Asian populations. The clinical, embryological, and epidemiological evidence may support an early teratogenic insult in the aetiology of this congenital defect.

nasal polyposis is an inflammatory condition of unknown etiology that involves nasal and sinus mucous membrane. these polyps can impair a person’s quality of life by nasal obstruction, recurrent sinusitis, persistent postnasal drainage, hyposmia, anosmia, changes in sense of taste and even bony destruction. it has been shown that chronic inflammation causes a reactive hyperplasia of the intrana...

Introduction: Paranasal sinuses mucoceles are benign, epithelial lined, mucus filled lesions, causing destruction of the adjacent sinus walls, and with further gradual extension to structures, serious morbidities mortalities may occur. Objective: To emphasize on efficacy endonasal endoscopic marsupialization in treatment paranasal mucoceles. Method: Retrospective descriptive study mucocele case...