In this paper, we propose a new computer aided detection (CAD) technique to utilize both global and local shape information of the colon wall for detection of colonic polyps. Firstly, the whole colon wall is extracted by our mixture-based image segmentation method. This method uses partial volume percentages to represent the distribution of different materials in each voxel, so it provides the ...

The capacity to spread beyond the limits of the tissue in which it was originated and to survive is the prerogative of malignant tumors, the feature at the basis of the concept of malignancy. In 90% of cases, a colon cancer originates from its dysplastic precursor, the adenomatous polyp; evidence that 60-70% of that cancer is localized in the distal colon suggests that environmental factors aff...

Colon cancer is the third leading class of cancer causing increased mortality in developed countries. A polyp is one type of lesion observed in a majority of colon cancer patients. Here, we report a microscopic Fourier transform infrared (FTIR) study of normal, adenomatous polyp and malignant cells from biopsies of 24 patients. The goal of our study was to differentiate an adenomatous polyp fro...

Fibroepithelial pharyngeal polyps are rare. We herein report a case of a 56-year-old Asian woman who presented with voice hoarseness and throat discomfort for several years because of a giant pharyngeal polyp. We resected the polyp under general anesthesia. It originated in the left hypopharyngeal wall. Postoperative recovery was uneventful. Her sore throat was diminished within 1 week after th...

Polypectomy-snare entrapment is a rare but serious complication of colonoscopy, frequently requiring surgical intervention. We report a case of polypectomysnare entrapment successfully treated using a novel endoscopic “zip-line” approach that, to our knowledge, has not been previously reported. A 35-year-old woman underwent a colonoscopy in our office-endoscopy suite, during which a 4 cm, broad...

Given a segmented CT scan data of the colon represented as a triangle mesh, our water-plane algorithm will detect polyp candidates. The water-plane method comprises of pouring water into a polyp protrusion from the outside of the colon and in raising the “water-plane” until it cannot be incremented any further without causing water leakage. The method starts at a vertex and uses average normal ...

The commonest pathologic diagnosis of large prolapsed polyps is leiomyoma. Benign or malignant adenomyomatous polyps follow. Adenomyotic cyst is a rare form of adenomyosis. To our knowledge, a recurrent prolapsed giant uterine polyp comprised of adenomyotic cysts and with different pathogenesis from the original polyp has not been reported in the literature. This case report describes a 29 year...

INTRODUCTION Several factors are used to stratify the probability of polyp recurrence. However, there are no studies correlating the location of the initial polyps and the recurrent ones. The aim of this study was to verify whether the polyp location at the surveillance colonoscopy was correlated with the location of the previously excised polyps at the baseline colonoscopy. METHODS A retrosp...

This chapter describes various techniques that can be employed to assist in the removal of colon polyps that are considered to be large or ‘difficult.’ Size alone is only one of the features that may cause some hesitation in making the decision to attempt polyp removal. Other factors that are related to the perceived level of difficulty are polyps that are flat and only slightly elevated above ...