Two-stage optical system for colorectal polyp assessments.

Background And Aims: Macroscopic real-time evaluations of the histopathology and degree of invasion of colorectal polyps help to select the most suitable endoscopic treatment method. Dual-focus (DF) narrow-band imaging (NBI) is a new imaging enhancement system that uses digital and optical methods to enhance the view of blood vessels on mucosal surfaces. However, the superiority of this technique over standard imaging techniques has not been previously reported.

Evaluation of magnetic scope navigation in screening endoscopic examination of colorectal cancer.

Background: Colorectal cancer is the most common cancer in Europe. Early diagnosis and treatment gives the patient a chance for complete recovery. Screening colonoscopies in the symptom-free patients are currently performed on a wide scale.

Gender-related differences in repopulation and early tumor response to preoperative radiotherapy in rectal cancer patients.

Purpose: Inhibition of tumor proliferation rate based on bromodeoxyuridine labelling index (BrdUrdLI), S-phase fraction (SPF) and MIB-1 labelling index (MIB-1 LI) as an early rectal cancer response to preoperative radiotherapy (RT).

Methods And Materials: A total of 122 patients qualified either for short RT (5 Gy/fraction/5 days) and surgery about 1 week after RT (schedule I) or for short RT and a 4-week interval before surgery (schedule II). Tumor samples were taken twice from each patient: before RT and at the time of surgery.

Bromodeoxyuridine labeling index as an indicator of early tumor response to preoperative radiotherapy in patients with rectal cancer.

Purpose: Assessment of tumor proliferation rate using Bromodeoxyuridine labeling index (BrdUrdLI) as a possible predictor of rectal cancer response to preoperative radiotherapy (RT).

Methods And Material: Ninety-two patients were qualified either to short RT (5 Gy/fraction/5 days) and surgery about 1 week after RT (schedule I), or to short RT and 4-5 weeks interval before surgery (schedule II). Tumor samples were taken twice from each patient: before RT and at the time of surgery.

[Age as a prognostic factor in colorectal cancer treatment].

Aging of the population leads to increasing the numbers of patients requiring surgical interventions. Though highest incidence of colorectal cancer occurs in the age range between 60-70 years, the incidence of colorectal cancer in the age group below 40 years has been also increasing. In this age group the course of the disease and prognosis are different than in the patients over 60 years of age.