Publications by authors named "Changhwan Cho"
Background: The purpose of the present study was to investigate risk factors associated with local recurrence in patients with locally advanced rectal cancer who received preoperative chemoradiotherapy in combination with total mesorectal excision (TME).
Methods: Rectal cancer patients who were treated with neoadjuvant chemoradiation with TME were studied. We compared 26 patients who developed local recurrence with 119 recurrence-free patients during the follow-up period.
Objective: This study was designed to determine whether the number of lymph nodes retrieved influence staging and survival in patients with stage II and III rectal cancer that undergo tumor-specific mesorectal excision.
Summary Background Data: The prognostic impact of the retrieved nodes has been emphasized in patients with colorectal cancer, but few studies have focused on patients with rectal cancer.
Methods: A total of 900 patients who underwent tumor-specific mesorectal excision with curative intent and adjuvant chemoradiation therapy for stage II and III rectal cancer from January 1989 to December 2006 were analyzed.
Background: We aimed to assess factors associated with the number of nodes retrieved and the impact of the number of lymph nodes in rectal cancer patients who underwent neoadjuvant chemoradiation with radical surgery.
Methods: A total of 258 patients were enrolled. Lymph nodes were retrieved from specimens using a manual dissection technique.
Background: This study was designed to evaluate the operative safety and long-term oncologic outcomes of sphincter-preserving surgery based on sharp mesorectal excision for rectal cancer.
Methods: Between January 1989 and June 2004, 931 patients underwent sphincter-preserving surgery based on sharp mesorectal excision. The operative safety and oncologic outcomes were assessed for the periods of 1989-1996 (n = 208) and 1997-2004 (n = 723).
Background: In patients undergoing total mesorectal excision (TME), the clinical variables most relevant to anastomotic recurrence have not been identified. We evaluated factors associated with anastomotic recurrence in patients undergoing TME and the impact of a reduced distal margin on anastomotic recurrence.
Methods: Thirty-eight patients with anastomotic recurrence were compared with 876 patients who received curative rectal cancer surgery.
Landfill gases could be vented through a layer of landfill cover soil that could serve as a biofilter to oxidize methane to carbon dioxide and water. Properly managed landfill cover soil layers may reduce atmospheric CH4 emissions from landfills. In the present study, the effects of earthworm cast and powdered activated carbon (PAC) on the CH4 removal capacity of the landfill cover soil was investigated.
View Article and Find Full Text PDFPurpose: The authors investigated the correlation between visual field defects detected by automated perimetry and the thickness of the retinal nerve fiber layer measured with optical coherence tomography, and examined whether there is a decrease in retinal nerve fiber layer thickness in the apparently normal hemifield of glaucomatous eyes.
Patients And Methods: Forty-one patients with glaucoma and 41 normal control subjects were included in this study. Statistical correlations between the sum of the total deviation of 37 stimuli of each hemifield and the ratio of decrease in retinal nerve fiber layer thickness were evaluated.