Characteristics and results of treatment of patients treated surgically with colorectal cancer in old and senile age.

Colorectal cancer (CC) in Poland is the type of cancer with the highest dynamics of disease growth and is epidemiologically related to age. The analysis involved 353 patients operated on due to CC in senile and old age and compared with younger patients. It was found that people at this age are more often diagnosed with CC They were more often women, the patients did not differ in the stage of cancer, while they were significantly more often qualified for surgery due to urgent indications. In patients with colonic cancer, the resectability and radicality of the procedures in comparison with patients with rectal cancer was significantly higher, while there were more complications and deaths in the 30-day follow-up in this group. The overall survival in senile and old age was significantly worse. In the first year of follow-up after surgical treatment of patients in this group, complications and deaths were more frequently observed. However, in patients who survived 12 months after the operation, the overall survival rate did not significantly differ.

Mitogenomic differences between the normal and tumor cells of colorectal cancer patients.

So far, a reliable spectrum of mitochondrial DNA mutations in colorectal cancer cells is still unknown, and neither is their significance in carcinogenesis. Indeed, it remains debatable whether mtDNA mutations are "drivers" or "passengers" of colorectal carcinogenesis. Thus, we analyzed 200 mitogenomes from normal and cancer tissues of 100 colorectal cancer patients. Minority variant mutations were detected at the 1% level. We showed that somatic mutations frequently occur in colorectal cancer cells (75%) and are randomly distributed across the mitochondrial genome. Mutational signatures of somatic mitogenome mutations suggest that they might arise through nucleotide deamination due to oxidative stress. The majority of somatic mutations localized within the coding region (in positions not known from the human phylogeny) and was potentially pathogenic to cell metabolism. Further analysis suggested that the relaxation of negative selection in the mitogenomes of colorectal cancer cells may allow accumulation of somatic mutations. Thus, a shift in glucose metabolism from oxidative phosphorylation to glycolysis may create advantageous conditions for accumulation of mtDNA mutations. Considering the fact that the presence of somatic mtDNA mutations was not associated with any clinicopathological features, we suggested that mtDNA somatic mutations are "passengers" rather than the cause of colorectal carcinogenesis.

The fecal occult blood test as a tool for improved outpatient qualification for colonoscopy. A single-center experience and 10-year follow-up survey.

PURPOSE: Colonoscopy is not widely and easily available in all countries, even for symptomatic patients. This is one of the causes of tumors not being diagnosed until an advanced stage. The aim of this study was to estimate the efficacy of the fecal occult blood test (FOBT) in the diagnostic work-up of outpatients referred to a colorectal unit due to indistinct abdominal symptoms. PATIENTS/METHODS: Among 10418 consecutive symptomatic individuals referred to the outpatient clinic, an immunochemical FOBT (Hem-Check 1®) was recommended for 9432 patients with indistinct symptoms as a tool for qualifying them for colonoscopy. All the subjects were treated according to their diagnosis and followed-up for the next 10 years. RESULTS: Colorectal cancer (CRC) was diagnosed in 535 individuals: 393/986 (39.9%) among patients with red-flag symptoms, and 142/951 (14.9%) of individuals with indistinct symptoms and a positive FOBT. In the latter group, less-advanced tumors, classed as such using Dukes' classification, were twice as common and more advanced CRC occurred twice as seldom than in the former. Cancer recurrence-free and overall survival periods after surgical treatment for CRC were significantly longer in patients with indistinct symptoms who qualified for diagnostic procedures on the basis of a positive FOBT. CONCLUSIONS: Patients with symptoms suggesting organic colon disease had a worse prognosis compared to individuals with non-specific symptoms. If bowel endoscopy is not widely and easily available, qualification for colonoscopy on the basis of alarm symptoms and a positive FOBT seems to be an effective strategy in early CRC diagnosis.

Intestinal stoma in patients with colorectal cancer from the perspective of 20-year period of clinical observation.

INTRODUCTION: Intestinal stoma is a procedure most often performed in patients with colorectal cancer. AIM: To identify the percentage of patients with colorectal cancer in which the intestinal stoma was performed. MATERIAL AND METHODS: We retrospectively analysed 443 patients treated during a 20-year period (1994-2013) due to colorectal cancer, in which the intestinal stoma was made during the first surgical intervention. RESULTS: In the second analysed decade, a significant decrease in the percentage of created stomas, definitive stomas in particular, was observed. Stomas were made significantly more often in patients with a tumour located in the rectum, the left half of the colon, and in patients undergoing urgent surgeries. An increased incidence of intestinal stomas was associated with a higher severity of illness and higher proportion of unresectable and non-radical procedures. The definitive stomas were significantly more often made in men and in patients with tumours located in the rectum, whereas temporary stomas were created significantly more often in patients undergoing urgent operations. CONCLUSIONS: In the last decade (2004-2013) the number of intestinal stomas in patients operated due to colorectal cancer was significantly reduced.

Heteroplasmic substitutions in the entire mitochondrial genomes of human colon cells detected by ultra-deep 454 sequencing.

Mitochondrial DNA (mtDNA) heteroplasmy has been widely described from clinical, evolutionary and analytical points of view. Historically, the majority of studies have been based on Sanger sequencing. However, next-generation sequencing technologies are now being used for heteroplasmy analysis. Ultra-deep sequencing approaches provide increased sensitivity for detecting minority variants. However, a phylogenetic a posteriori analysis revealed that most of the next-generation sequencing data published to date suffers from shortcomings. Because implementation of new technologies in clinical, population, or forensic studies requires proper verification, in this paper we present a direct comparison of ultra-deep 454 and Sanger sequencing for the detection of heteroplasmy in complete mitochondrial genomes of normal colon cells. The spectrum of heteroplasmic mutations is discussed against the background of mitochondrial DNA variability in human populations.

Colorectal cancer with intestinal perforation - a retrospective analysis of treatment outcomes.

AIM OF THE STUDY: Colorectal cancer (CRC) is one of the leading cause of death in European population. It progresses without any symptoms in the early stages or those clinical symptoms are very discrete. The aim of this study was a retrospective analysis of treatment outcomes in patients with colorectal cancer complicated with intestinal perforation. MATERIAL AND METHODS: A retrospective analysis of patients urgently operated upon in our Division of General Surgery, because of large intestine perforation, from February 1993 to February 2013 has been made. Results were compared with a group of patients undergoing the elective surgery for colorectal cancer in the same time and Division. RESULTS: Intestinal perforation occurred more often in males (6.52% vs. 6.03%), patients with mucous component in histopathological examination (9.09% vs. 6.01%) and with clinicaly advanced CRC. Patients treated because of perforation had a five-fold higher 30 day mortality rate (9.09% vs. 1.83%), however long-term survival did not differ significantly in both groups. After resectional surgery in 874 patients an intestinal anastomosis was made. Anastomotic leakage was present in 23 (2.6%) patients. This complication occurred six-fold more frequently in a group of patients operated upon because of intestinal perforation (12.20% vs. 2.16%). CONCLUSIONS: In patients with CRC complicated with perforation of the colon in a 30-day observation significantly higher rate of complications and mortality was shown, whereas there was no difference in distant survival rates.

Usefulness of CEA concentration measurement and classic colonoscopy in follow-up after radical treatment of colorectal cancer.

UNLABELLED: There is always a certain rate of recurrence after radical treatment for cancer and to get on it an early detection of disease set back is crucial. MATERIAL AND METHODS: Medical data of patients operated on for primarily detected colorectal cancer in years 1993-2002 was retrospectively reviewed. Usefulness of follow-up means such as physical examination, or CEA and endoscopic surveillance was analyzed. All mentioned above were applied to scheduled follow-up (in 3, 6 and 12 month intervals following an operation and annually after that by the year 5). RESULTS: Complete and reliable data was obtained from 340 out of 502 follow-up intended subjects (67.7%). Elevated CEA was the most frequent predictor of recurrence within non-symptomatic subjects meeting follow-up appointments (60%). The cancer set back diagnosed by means of either physical or endoscopic examinations was the case only in one out of five patients (20.75% and 18.87% respectively). Clinical onset of recurrence making patients meet an unscheduled appointment was found increasing relative risk of nothing-but-palliative option either for them with local set back, or meta-static spread. Relative risk of onset of meta-chronous colonic cancer was significantly higher in patients being affected by synchronous advanced adenoma at time of surgery compared to those with one-fold changes. CONCLUSIONS: CEA scheduled follow-up after treatment for colorectal cancer CRC seems adequate to provide a good outcome of treatment for recurrent tumors. CRC patients presenting with synchronous advanced adenomas at time of surgery are probably to be under more intensive endoscopic surveillance.

Knowledge of symptoms and diagnostic possibilities of cancer diseases.

INTRODUCTION: The aim of the present study was to analyse patients' knowledge in the field of neoplastic prophylaxis. MATERIAL AND METHODS: The research was carried out between 2007 and 2008 in the Provincial Hospital in Bydgoszcz (i.e. general surgery, gynaecology and obstetrics, urology, breast surgery and thoracic surgery). Altogether 300 patients (of whom 250 were hospitalized) as well as 50 healthy subjects forming the control group were invited to participate in the study. A proprietary questionnaire containing eight multiple choice and another twelve open-ended questions was used for the purpose of the study. RESULTS: Prostate and lung cancer patients were more aware of their diseases compared to the control group, but the differences were not significant (p = 0.85 and p = 0.53 respectively). In the field of screening the patients' knowledge, it was significantly higher in breast cancer subjects (p = 0.0008) while there was no difference compared to the control group in the remaining groups of cancer patients (i.e. colorectal, prostate or uterus cancer). Those most aware of their condition were patients from small towns (below 50,000), while subjects living in villages were the least aware. CONCLUSIONS: Patients showed the greatest amount of knowledge regarding breast cancer and the least amount regarding prostate cancer. Oncological awareness in cancer patients was found to be related to variables such as education, age and residence. No difference was found between patients and controls, comparing their knowledge of disease symptoms as well as screening possibilities.

[Evaluation of usefulness of faecal occult blood test. Prospective screening study in patients with colorectal neoplasia]. / Ocena przydatnosci pomiaru testu na krew utajona w kale. Prospektywne badanie przesiewowe u chorych na nowotwory jelita grubego.

UNLABELLED: High incidence of colorectal cancer (CRC), good treatment outcome in case of surgery performed at an early stage of the disease, and a simple, low cost and quick diagnostic test, encourage the common use of screening for CRC. The aim of the study was to examine the efficacy of immunochromatographic faecal occult blood (FOB) testing in screening for early colorectal cancer. MATERIAL AND METHODS: A total of 346 subjects with abdominal symptoms of unclear etiology were included to the study. Patients with diagnosed CRC, clinical symptoms suggesting CRC or those with family history of CRC were excluded from the study. All subjects had FOB testing done. All were subjected to sigmoidoscopy, no matter what the result of the screening test was. The sensitivity and specificity of the screening test for CRC was evaluated. RESULTS: The total of 342 subjects aged 29-68 years (median 59 yrs), including 189 (58%) females and 153 (42%) males, were eventually qualified for the study. Colorectal pathology was found in 117 subjects (34.6%). Out of 62 patients with positive tests, 55 (89%) had a colorectal disorder diagnosed during sigmoidoscopy. The results were false positive in 7 cases. Colorectal neoplasia was recognized in 33 cases. These were neoplastic polyps (23) and adenocarcinoma (10). The great majority of neoplastic conditions were found in FOB positive subjects. The sensitivity of the test was 90%, while its specificity reached 84%. Diagnostic accuracy was 84%. Positive and negative predictive values were 15% and 99% respectively. CONCLUSIONS: FOB testing appears highly sensitive and specific for colorectal cancer in patients with unclear abdominal symptoms.