We compared clinicopathological characteristics of colorectal polyps, in order to investigate the hypothesis of neoplastic transformation of hyperplastic polyps. Of 4723 colonoscopies performed in our department over four years, 22 patients with 23 mixed hyperplastic polyps (MHAP) were found. These were compared with 61 patients with 86 hyperplastic polyps, 40 with 58 tubular adenomas and 27 wi...

Objectives. The utility of examining specimens from colorectal biopsies of polyps for nonneoplastic diseases is currently unknown. Our objectives were to characterize such additional diagnoses that could be rendered. Methods. We retrospectively and prospectively reviewed specimens from endoscopic biopsies of colorectal polyps obtained during routine screening or surveillance. Results. 17 of 168...

PURPOSE Because colonoscopy after colorectal cancer surgery is important for detecting synchronous or metachronous colorectal neoplasms, we designed this study to investigate, by using postoperative colonoscopy, the miss rate for and the location of polyps remaining after colorectal cancer surgery. METHODS In a prospectively-collected patient database, 264 patients were shown to have undergon...

BACKGROUND This study aimed to evaluate upper gastrointestinal polyps detected during esophago- gastroduodenoscopy tests. MATERIALS AND METHODS We conducted a retrospective analysis on data regarding 55,987 upper gastrointestinal endoscopy tests performed at the endoscopy unit of Istanbul Education and Research Hospital between January 2006 and June 2012. RESULTS A total of 66 upper gastroi...

OBJECTIVES The pathogenesis of sinonasal polyposis remains unclear, in spite of several investigative approaches. Antrochoanal polyps, a subgroup of sinonasal polyposis along with allergic- and chronic-inflammatory nasal polyps, mostly originate from the maxillary sinus and develop as a unilateral, pedunculated mass towards the nasopharynx. The human papillomavirus (HPV) is discussed as a possi...

Colorectal cancers associated with Lynch syndrome are characterized by deficient DNA mismatch repair (MMR) function. Our aim was to evaluate the prevalence of microsatellite instability (MSI) and loss of MMR protein expression in Lynch syndrome-associated polyps. Sixty-two colorectal polyps--37 adenomatous polyps, 23 hyperplastic polyps, and 2 sessile serrated polyps (SSP)--from 34 subjects wit...

UNLABELLED BACKGROUND, AIMS, AND PATIENTS: In a prospective follow up and intervention study of colorectal polyps, leaving all polyps less than 10 mm in situ for three years, analysis of redetection rate, growth, and new polyp formation was carried out in 116 patients undergoing annual colonoscopy. The findings in relation to growth and new polyp formation were applied to 58 subjects who receiv...

UNLABELLED Endoscopic polypectomy of colorectal polyps is a common procedure. However, endoscopic treatment of large polyps (those with a diameter exceeding 2 cm) remains questionable. There is a serious risk of colorectal carcinoma presence inside these lesions, which eventually would require surgical intervention. Apart from this fact endoscopic polypectomy of large polyps is connected with s...

BACKGROUND Hyperplastic polyps are common benign colorectal polyps, and are thought to have little association with malignant tumours in the colorectum. However, several reports suggest that some hyperplastic polyps may develop into colorectal neoplasms. AIM To clarify genetic alterations in colorectal hyperplastic polyps. METHODS Twenty eight colorectal polyps having serrated components we...

Background. Colorectal cancer mostly arises from the polyps of colon. The aim of our study was to examine the association of body mass index (BMI) and serum lipids with the colorectal polyps in old Chinese people. Methods. The risk of developing colorectal polyps was studied in 244 subjects (212 men and 32 women, 74.63 ± 11.63 years old) who underwent colonoscopy for the first time from January...