TR-Dizin İndeksli Yayınlar Koleksiyonu
Permanent URI for this collectionhttps://hdl.handle.net/11727/4808
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Item Histopathological Changes of Neoadjuvant Chemoradiation and Relation with the Pre-Treatment Tumor Stage in Rectal Carcinoma(2017) Ozgun, Gonca; Atalay, Fatma Oz; Ugras, Nesrin; Yerci, OmerObjective: Neoadjuvant chemoradiotherapy has considered one of the standard treatment modalities for locally advanced rectal cancers. Chemoradiotherapy has a variety of different effects and responses on tumor, tumor bed and peritumoral tissues. The purpose of the present study was to evaluate the stromal responses in tumor bed between the different treatment modalities and different clinical T stages. Methods: Fifty-seven consecutive patients with median age of 62.4 years were treated for rectal adenocarcinoma between January 2005 and July 2012 in Uludag University Medical Faculty. Twenty-three of the patients were treated with neoadjuvant chemoradiation therapy and following surgery, 34 patients treated with surgery only. Results: When we compared the stromal responses in the tumor bed between the two different treatment modalities, the amount of fibrosis and intensity of inflammatory cell infiltration were found considerably marked. The existence of calcification, hemosiderin-laden macrophages and mucin lakes were found also significant marked. There was no difference found in between the patients with different clinical stages which were received neoadjuvant CRT. Conclusion: The stromal response in the tumor bed increases with the neoadjuvant chemoradiotherapy but the excess of the response doesn't have any relation with the clinical T stage.Item A Retrospective Evaluation of the Epithelial Changes/Lesions and Neoplasms of the Gallbladder in Turkey and a Review of the Existing Sampling Methods: A Multicentre Study(2018) Ozgun, Gonca; Esendaglı, Guldal; Akarca, F. Goknur; Balci, Serdar; Argon, Asuman; Sengiz Erhan, Selma; Turhan, Nesrin; Ince Zengin, Neslihan; Hallac Keser, Sevinc; Celik, Betul; Bulut, Tangul; Abdullazade, Samir; Erden, Esra; Savas, Berna; Bostan, Temmuz; Sagol, Ozgul; Aysal Agalar, Anil; Kepil, Nuray; Karslioglu, Yildirim; Gunal, Armagan; Markoc, Fatma; Saka, Burcu; Ozdamar, Sukru Oguz; Bahadir, Burak; Kaymaz, Esin; Isik, Emre; Ayhan, Semin; Tuncel, Deniz; Ozguven Yilmaz, Banu; Celik, Sevinc; Karabacak, Tuba; Erbarut Seven, Ipek; Ataizi Celikel, Cigdem; Gucin, Zuhal; Ekinci, Ozgur; Akyol, Gulen; 28984336Objective: As there is continuing disagreement among the observers on the differential diagnosis between the epithelial changes/lesions and neoplasms of the gallbladder, this multicentre study was planned in order to assess the rate of the epithelial gallbladder lesions in Turkey and to propose microscopy and macroscopy protocols. Material and Method: With the participation of 22 institutions around Turkey that were included in the Hepato-Pancreato-Biliary Study Group, 89,324 cholecystectomy specimens sampled from 2003 to 2016 were retrospectively evaluated. The numbers of adenocarcinomas, dysplasias, intracholecystic neoplasms/adenomas, intestinal metaplasias and reactive atypia were identified with the review of pathology reports and the regional and countrywide incidence rates were presented in percentages. Results: Epithelial changes/lesions were reported in 6% of cholecystectomy materials. Of these epithelial lesions, 7% were reported as adenocarcinoma, 0.9% as high-grade dysplasia, 4% as low-grade dysplasia, 7.8% as reactive/regenerative atypia, 1.7% as neoplastic polyp, and 15.6% as intestinal metaplasia. The remaining lesions (63%) primarily included non-neoplastic polypoids/hyperplastic lesions and antral/pyloric metaplasia. There were also differences between pathology laboratories. Conclusion: The major causes of the difference in reporting these epithelial changes/lesions and neoplasms include the differences related to the institute's oncological surgery frequency, sampling protocols, geographical dissimilarities, and differences in the diagnoses/interpretations of the pathologists. It seems that the diagnosis may change if new sections are taken from the specimen when any epithelial abnormality is seen during microscopic examination of the cholecystectomy materials.Item Long-term and Perioperative Outcomes of Laparoscopic and Open Surgery for Rectal Cancer(2018) Aydin, Huseyin Onur; Ekici, Yahya; Karakayali, Feza Yarbug; Tezcaner, Tugan; Ozgun, Gonca; Yildirim, Sedat; Moray, GokhanObjectives: The necessity of comparing oncologic results with the use of minimally invasive surgery in rectal cancer has arisen. The aim of the present study was to evaluate the treatment approach in rectal cancer and to compare the outcomes of laparoscopic and open surgery. Methods: Patients who underwent surgery for rectal carcinoma between January 2006 and January 2016 in our institution were evaluated. The results were compared between the two groups according to open or laparoscopic surgery. Clinical characteristics, preoperative and postoperative results, pathological examination results, and disease-free survival rates were compared after the surgical procedure. Results: A total of 121 patients were included in the study. Of the patients, 50 underwent open, and 71 underwent laparoscopic surgery. The median follow-up times were 56.75 months in the open surgery group and 55.2 months in the laparoscopic surgery group. Pathological examination revealed similar numbers of lymph nodes in both groups (p>0.05). The duration of hospital stay was statistically significantly lower in the open surgery group than in the laparoscopic group (p<0.05). The rates of disease-free survival were 74% in the open surgery group and 82.5% in the laparoscopic group, and no statistically significant difference was found (p>0.05). Conclusion: There was no significant difference in complication and recurrence between laparoscopic and open surgery for rectal cancer in our study. The duration of hospital stay of patients was statistically significantly lower in the laparoscopic group than in the open surgery group. Laparoscopic or open surgical options could be preferred according to the clinical suitability of the patient, experience of the surgeon, and resources of the center in rectal cancer treatment.