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Biomedical subjects

J Skokowski

Publications and source records attributed to J Skokowski.

At least 19 recordsLinked to original sources
PubMed2006

Blue-dye intraoperative sentinel lymph node mapping in early non-small cell lung cancer.

AIMS: The blue-dye staining method of sentinel lymph node identification in lung cancer patients has been scarcely reported. The study was designed to assess the sensitivity, accuracy and negative predictive value (NPV) of intraoperative sentinel lymph node mapping in patients with non-small cell lung cancer by means of staining with colloid or water solution of blue dye. PATIENTS AND METHODS: One hundred and ten patients with clinically confirmed NO non-small cell lung cancer were enrolled into prospective study of intraoperative sentinel node identification. Four quadrants of the peritumoral tissue were injected with 4 ml of blue dye. After complete lymphadenectomy, all resected lymph nodes were examined with conventional hematoxylin-eosine staining. All negative sentinel nodes were searched for metastatic deposits with both serial sections and immunohistochemistry for cytokeratines. RESULTS: The blue-dye technique was characterized by unacceptably low sentinel node identification rate (IR) and low sensitivity (27% and 67% respectively). No significant differences were found in either the sensitivity or NPV among the colloid or water solutions of the blue dye applied. Although patent blue (colloid) was superior to water solution of methylene blue in identifying sentinel lymph node (identification rate 36% and 22% respectively) the sensitivity and NPV were lower (63% and 80% for patent blue and 75% and 92% for methylene blue respectively). CONCLUSION: The blue-dye staining method of sentinel node identification in non-small cell lung cancer patients is inadequate and should not be recommended for clinical use.

Adult↗
PubMed2005

Clinical significance of apoptotic index in non-small cell lung cancer: correlation with p53, mdm2, pRb and p21WAF1/CIP1 protein expression.

PURPOSE: The aim of this study was to assess the prognostic relevance of apoptotic index (AI), considered alone or together with expression of several proteins controlling G1 check point (p53, mdm2, pRb and p21WAF1/CIP1) in non-small cell lung cancer (NSCLC) patients. METHODS: Study group included 50 NSCLC patients who underwent curative pulmonary resection. Apoptosis was detected with the use of TUNEL technique and AI was defined as the number of apoptotic cells per 1,000 tumor cells. The expression of p53, mdm2, pRb and p21WAF1/CIP1 was assessed immunohistochemically. RESULTS: The mean and median AI calculated for all 50 patients was 14 and 9, respectively. Patients with lower (<14) and higher (> or =14) AI constituted 35 (70%) and 15 (30%) of cases, respectively. AI was not correlated with patient clinical characteristics, and expression of p53, pRb and p21WAF1/CIP1 . However, lower AI was correlated with over-expression of mdm2 protein (P=0.04). Median survival for patients with lower and higher AI was 43 months and 22 months, respectively, and 5-year survival probability-60 and 25%, respectively (P=0.03). In multivariate analysis, the only variable associated with shortened survival was AI (P=0.03, HR=2.9, 95% CI 1.95-3.86). CONCLUSIONS: These results suggest that AI correlates with mdm2 protein expression and influences survival in NSCLC.

Aged↗
PubMed2005

Lung function in patients operated for chronic pleural empyema.

OBJECTIVES: To evaluate lung function after lung decortication in patients operated for chronic pleural empyema. METHODS AND MATERIALS: To determine the lung function after lung decortication in 20 men (71.4%) and 8 women (28.6%) a prospective evaluation of blood gases, spirometry, lung perfusion, ventilation, and alveolar permeability were performed 28 weeks (15-60 weeks) after the operation. RESULTS: Median lung perfusion on the affected side was 45.2% (26.1-55.3%) in 13 right and 36% (13.8-47.2%) in 15 left empyemas, and was within normal limits in 4/28 cases. The mean lung ventilation was 44.4% (21.5-54%) and 37% (18.9-50.6%) in patients affected on the right or left side, respectively. Ventilation perfusion inequality occurred in 22 patients (78.6%). Dynamic ventilation scintigraphy revealed impairment of epithelial integrity in 10 cases (35.7%). Individual analysis revealed that 15 patients (53.6%) showed a severe reduction in one of the examinations and 8 (28.6%) in more than one. CONCLUSIONS: Although the separate analysis of the different functional parameters revealed a mild reduction of lung function after decortication, in the majority of patients the impairment was more severe due to multilevel functional lung damage.

Adolescent↗
PubMed2005

The problem of pain evaluation in the process of nursing care in thoracosurgical patients and in general surgery.

Postoperative pain causes numerous disorders in systemic homeostasis. It may result in various complications prolonging the period of convalescence and making the rehabilitation difficult, or even being dangerous to life. A nurse becomes irreplaceable in the process of pain evaluation just after surgical procedures since the pain intensity constitutes the basis for later treatment decisions. The aim of the research is the evaluation of postoperative pain in patients after thoracic and abdominal surgical procedures. 50 thoracosurgical patients and 50 general surgical patients were involved in the research. Patients were selected at random. A visual-analogue scale was used for pain evaluation and the categorisation table was used for the evaluation of patients' self-care ability. Statistical analysis was performed by means of STATISTICA 6 package (StatSoft, Inc). The results prove that in thoracosurgical patients pain intensity is lower and there is no dependence on the operation performed, as in the case of patients after surgical procedures within the abdominal cavity. Statistically significant differences were observed between groups of patients and the analgesic drugs used as well as pain intensity. The evaluation of patients' self-care ability does not depend on the intensity of pain declared by patients.

Aged↗
PubMed2004

Overexpression of cathepsin B correlates with angiogenesis in colon adenocarcinoma.

Some studies have shown the influence of proteases and vascular density in colorectal primary tumors on spreading and on the course of colorectal cancer. In the present study we have analyzed the relationships between overexpression of cathepsin B protein and angiogenesis intensity in resected colon tumors and their impact on prognosis. It has been investigated in a series of 90 colon cancer patients. Immunohistochemistry was used to evaluate cathepsin B overexpression in cancer cells and to visualize microvessels with antibodies against von Willebrand factor. Overexpression of cathepsin B was observed if more than 50% of cancer cells in searched field showed immunoreactivity with antibody against cathepsin B. Intensity of angiogenesis was evaluated as a mean number of microvessels from three fields with highest vessel number. In 36 cases (40%) overexpression of cathepsin B was detected. Increased angiogenesis (above median 31 vessels per 0.785 mm2) correlated positively with cathepsin B overexpression (p=0.0006). Higher vascular density associated with the presence of metastases in regional lymph nodes (p=0.01). Overexpression of cathepsin B was observed more often in group of older people (age above median 65 years; p=0.005). According to univariate analysis metastases in regional lymph nodes (p=0.0007), increased angiogenesis (p=0.0085), and distant metastases (p=0.02) were the features potentially influencing prognosis. Multivariate analysis revealed independent prognostic value only in case of metastases in regional lymph nodes (p=0.013) and when distant metastases were present (p=0.021), but not when increased angiogenesis in primary colon adenocarcinoma was observed (p=0.078). In conclusion we can say that there is a close relationship between intensity of angiogenesis and overexpression of cathepsin B protein in cancer cells in resected colon adenocarcinoma.

Adenocarcinoma↗
PubMed2002

Prognostic relevance of proliferating cell nuclear antigen and p53 expression in non-small cell lung cancer.

Prognostic value of p53 and PCNA expression in non-small cell lung cancer (NSCLC) remains controversial. In this study we determined the relevance of these abnormalities in terms of overall survival and disease-free survival in 95 NSCLC patients who underwent curative pulmonary resection. Expression of p53 was found in 44 samples (45%), expression of PCNA-in 79 samples (83%), and expression of both markers-in 35 samples (36%). There was no relationship between expression of either protein and major clinicopathological characteristics. Median survival for patients with and without p53 expression was 36 and 33 months, respectively and 5-year survival probability-29 and 37%, respectively (P=0.73). Median survival for patients with and without PCNA expression was 36 and 27 months, respectively and 5-year survival probability-35 and 25%, respectively (P=0.60). There was no significant difference in overall survival between particular groups of patients with tumors carrying four possible p53/PCNA phenotypes. In multivariate analysis including patient age, sex, tumor stage, tumor type and differentiation, p53 and PCNA expression, the only variable important for survival was stage of disease. These results suggest the lack of prognostic relevance of p53 and PCNA expression in surgically treated NSCLC patients.

Adenocarcinoma↗
PubMed2001

Amplification of c-myc gene and overexpression of c-Myc protein in breast cancer and adjacent non-neoplastic tissue.

BACKGROUND: Deregulated c-Myc expression and alterations of c-myc oncogene have been reported to play an important role in breast cancer tumorigenesis. We examined the relationship between c-Myc protein level, amplification of c-myc oncogene and commonly used clinical and pathologic factors. METHODS: The studies were conducted on 94 ductal and lobular cancers. Amplification of c-Myc was assessed by the semiquantitative multiplex PCR assay. The amount of c-Myc protein was estimated by the densitometry analysis of Western blots. RESULTS: Amplification of c-Myc was found in 21% of examined cancers. There was no association of c-myc amplification with established risk factors. Overexpression of c-Myc protein without c-myc amplification was associated with negative status of axillary lymph node. The size of lobular carcinoma displaying overexpression of c-Myc and the normal copy number of c-myc gene was significantly smaller than the size of tumor with elevated c-Myc and amplification of c-myc gene (p < 0.01). Within tumors displaying overexpression of c-Myc protein and c-myc gene amplification the size of ductal carcinoma was smaller than the size of lobular carcinoma (p < 0.007). CONCLUSION: Data presented in this study suggest that alterations of c-myc gene and c-Myc protein level might be related to breast cancer progression. The prognostic utility of elevated level of c-Myc protein associated with normal status of c-myc gene for patients with lobular carcinoma requires further studies.

Breast↗
PubMed2001

Serum p53 antibodies in small cell lung cancer: the lack of prognostic relevance.

Prognostic relevance of serum p53 antibodies was assessed in 96 patients with microscopically proven small cell lung cancer (SCLC). The study group included 67 males and 29 females; mean age 58 years; range 35--86 years; 60 with limited disease (LD), and 36 with extensive disease (ED). The control group consisted of 41 patients with non-malignant diseases. The presence of p53 antibodies was assayed by the immunoenzymatic method (P53 ELISA kit, PharmaCell, France). Antibodies were present in 26 SCLC cases (27%); 15 (25%) in LD and 11 (31%) in ED. Antibodies were also found in one out of 41 control subjects (2%). There was no correlation between the level of antibodies and clinical characteristics of SCLC patients including age, gender and extent of disease. The median follow-up for the entire group was 30 months (range: 11--39 months). By the time of analysis, 78 patients (82%) had deceased. Median survival in SCLC patients with and without antibodies was 42 and 39 weeks, respectively (log rank, P=0.81). These results indicate the lack of clinical relevance of serum p53 antibodies in SCLC.

Adult↗
PubMed2001

Types and localisation of p53 gene mutations: a report on 332 non-small cell lung cancer patients.

Mutations of p53 suppressor gene are among the most common molecular abnormalities in human malignancies. We demonstrated earlier significant differences in mutational profiles between NSCLC patients from Poland and Spain. These differences were most probably related to ethnic and/or geographical factors. In the present study we analyzed the types and location of p53 gene mutations in a large group of 332 operated NSCLC patients from two institutions in Northern Poland. Within the last decades this region has been characterized by the highest incidence of lung cancer in Poland. We used both frozen and paraffin-embedded tumor samples and the screened region included exons from 5 to 8. A total of 96 samples (29%) were positive for p53 gene mutation. The proportion of mutations in particular exons was as follows: exon 5-33%, exon 6-22%, exon 7-16%, and exon 8-29%. Three 'hot spots' were located in codons 176,245 and 248. Evolutionary conserved domains were much more frequently affected than the regions outside domains. The majority of mutations (73%) were missense type, followed by null and silent mutations (21 and 6%, respectively). In all six silent mutations substituted was the third base in codon. There were no major differences in the types and locations of mutations between patients from the two institutions. This homogeneity, together with our earlier findings, may confirm the impact of ethnic and geographical factors on the mutational profile of p53 gene in NSCLC.

Aged↗
PubMed2000

Results of surgical treatment of non-small cell lung cancer: validation of the new postoperative pathologic TNM classification.

OBJECTIVE: Prognostic relevance of the current TNM stage grouping for lung cancer is still a matter of debate. METHODS: To validate the new pathologic TNM classification for non-small cell lung cancer, we analyzed the survival data of 586 patients who underwent complete pulmonary resection and pathologic staging at one institution. RESULTS: The current TNM stage grouping well reflected the long-term prognostic hierarchy. There was a good distinction between new substages IA and IB (5-year survivals of 66% and 53%, respectively). The subdivision of stage II led to an under-representation of stage IIA (6 patients [1.0%]), and therefore the appropriateness of this modification could not be verified. Five-year survival in the T3 N0 category (30%) was significantly better than that found in the new stage IIIA (15%). No difference was found between T3 N0 and T2 N1, the categories constituting new stage IIB. Within stage IIIA there was a significant survival difference between T3 N2 (6%) and the remaining T and N designations (18%). Moreover, the 5-year survival in the T3 N1 category (35%) was similar to that found in the new stage IIB (27%) and better than in any T N2 tumors (12%). CONCLUSION: Most of our findings confirmed prognostic relevance of the current pTNM stage grouping in patients with resectable non-small cell lung cancer. However, despite recent modifications, there is still a significant heterogeneity that flaws stage IIIA.

Adult↗
PubMed2000

[Prognostic value of P53 protein in cells of non-small cell lung cancer].

The aim of the study was to evaluate the prognostic relevance of p53 protein in non-small cell lung cancer. The 95 surgically treated patients were included (53 patients with squamous cell carcinoma, 29--with adenocarcinoma, 5--with large cell carcinoma, and 8--with mixed type). The protein was assessed immunohistochemically with the use of monoclonal antibodies DO7, DAKO. Positive staining was present in 44 patients. There was no survival difference between groups with and without protein (median survival--36 and 33 months, respectively; p = 0.86). In the multivariate analysis the only characteristics with prognostic impact in the entire group was stage of the disease. There was no correlation between the expression of p53 protein and disease-free survival. These results indicate that there is no prognostic relevance of p53 protein in non-small cell lung cancer.

Adult↗
PubMed2000

Application of mechanical and manual sutures enclosing the bronchus.

The mechanical suture was introduced into thoracic surgical procedures by Amonosow and Androsow, Soviet surgeons, in the late 50s. The aim of the paper is to compare the incidence of bronchopleural fistulae that develop after the mechanical suture has been applied in bronchus surgery with the corresponding figures for traditional manual sutures. In the period of January 1997-March 1999 a series of 524 anatomical lung parenchyma resections was performed at the Department of Thoracic Surgery, Medical Academy of Gdańsk. In 460 cases (87.8%) the indication for the procedure came from primary lung carcinoma, and in 64 cases (12.2%) from tuberculosis, hamartoma, arteriovenous fistula, inflammatory lesions, asperpilloma, and metastases to the lungs. Depending on the way the bronchus was surgically closed the patients were subgrouped as follows: group I comprised 209 subjects (40.6%) whose bronchus was closed with a mechanical TA Premium Auto Suture, and group II that embraced 306 subjects (59.4%) whose bronchus was closed with a manual PDS 3/0 or Maxon 3/0 suture. The bronchopleural fistula developed in 11 cases of which 5/216 (2.3%) had the bronchus stump closed with a mechanical suture, and 6/308 (2.0%) cases had it closed with a manual suture. Of 11 cases of bronchopleural fistula 10 cases were noted after pneumonectomy. After the right side pneumonectomy, one fistula was discovered following the application of mechanical suture and six fistulas were found when the manual suture was used. After the left side pneumonectomy, no fistulae were discovered when the manual suture was used, and 3 those found were exclusively present when the mechanical suture was applied.

Adult↗
PubMed1999

[[A case of primary tracheo-bronchial amyloidosis].

A case of tracheobronchial amyloidosis is described in a 39 year-old man. The diagnosis was established histologically by a bronchoscopic biopsy which revealed a diffuse infiltrative process in the tracheobronchial tree. Due to the symptoms of obstruction of the lower respiratory tract the patient was treated with Prednisone and Melphalan and with partial excision of amyloid deposits by bronchoscopy. Bronchoscopy although carrying a risk of bleeding is the procedure of choice in diagnosis and therapy of such cases.

Adult↗
PubMed1998

[Congenital esophago-tracheal fistula in an adult].

A 33 year old man with recurrent respiratory tract infections was admitted to surgery ward. During esophagoscopy and bronchoscopy--esophago-tracheal fistula was found. Diagnosis was confirmed by radiologic examination of esophagus. Surgical treatment was performed with good result.

Adult↗
PubMed1998

Myoid cells and neuroendocrine markers in myasthenic thymuses.

We have studied myoid cells in normal and myasthenic thymuses as well as in thymomas. For the presence of neuroendocrine markers-producing cells and identification of synaptophysin (Syn) the immunohistochemical method and immunoblot analysis were used. Myoid cells can be demonstrated in the thymus of myasthenic patients in high number. These cells occur in the vicinity of Hassall's bodies but also within them. Some regenerated Hassall's bodies displayed majority of myoid cells with their concentric arrangement around the centrally situated lacunar-like cell with nuclei of monocytogenic origin. Such phenomenon may suggest cooperation of myoid cells and their epithelial transitional forms with monocytogenic cells in various thymic hormone production. It is likely that myoid cells are the source of some thymic epithelial cells. According to some authors, thymomatous epithelial cells and skeletal muscle share a common epitope defined by a monoclonal antibody (mAb), whereas thymic epithelial cells possess acetylocholine receptor (AChR) on their surface. The epithelial cells of some thymomas express also desmin. In normal thymuses of children, Syn and chromogranin A (Chg A) were demonstrated in some cells of Hassall's bodies by immunohistochemical method. In addition, antibodies to Syn stained nerve structures surrounding the thymic blood vessels. In myasthenic thymuses, Syn expression was in cortical and medullary epithelial cells, in myoid cells and only scanty and focal in keratinized epithelial cells of Hassall's bodies. The epithelial cells of some thymomas also express Syn. In some thymuses of all groups investigated in this study Chg A was seen in single cells of Hassall's bodies and focally in cortical epithelial cells. Our results show that in normal thymuses of cardiac surgery patients and in the adult myasthenic thymuses antibody raised against Syn recognized protein with molecular weight of 48,000 but not normal (38,000) Syn. It remains to be elucidated if the overexpression of synaptophysin-like protein in myasthenic thymuses is a compensatory phenomenon to the defect in normal synaptic function.

Adult↗
PubMed1998

[Evaluation of the prognostic significance of P53 mutation in patients with non-small cell lung cancer].

Prognostic value of p53 gene mutation was determined in 95 radically operated non small cell lung cancer patients (78 males and 17 females, mean age 57.8 years). Study group included 62 cases of squamous cell carcinoma, 30--adenocarcinoma and 3--large cell carcinoma. There were 52 patients in stage I disease, 16--in stage II, 26--in stage IIIa and one--in stage IIIb. Paraffin-embedded samples of resected tumors were assayed for p53 mutations with the use of PCR/SSCP analysis. p53 mutation were present in 22 cases (23%). The median survival in patients with and without p53 mutations were 49 and 75 months (p = 0.46), respectively, and the five-year survival rate 53% and 50%, respectively. In stage I disease the median survival for patients with p53 mutation was 53 months and for those without mutations the median survival could not be determined as more then a half of them were alive. Median survival in stage II patients with and without mutations was 35 months and 44 months (p = 0.62), and in stage IIIA--9.5 months and 17 months, respectively (p = 0.37). The results of this study indicate that p53 gene mutation is not correlated with prognosis in non-small cell lung cancer patients.

Adult↗
PubMed1997

Decreased selenium concentration and glutathione peroxidase activity in blood and increase of these parameters in malignant tissue of lung cancer patients.

We studied the selenium (Se) concentration in whole blood and plasma, glutathione peroxidase (GSH-Px) activity in red blood cells and plasma, as well as both of these parameters in cancerous and tumor-free lung tissue of lung cancer patients. Blood samples were taken from 84 cancer patients and 61 healthy controls. Normal and neoplastic lung tissues were obtained from 57 patients at the time of surgery. Se concentrations in whole blood and plasma were lower by 23% (p < 0.001) in patients compared with controls. GSH-Px activity in red cells was lower by 20.2% (p < 0.004) and in plasma by 11.7% (p < 0.05) in patients than in the control group. On the other hand, the tumor Se level was higher by 66.6% (p < 0.0001) and GSH Px activity by 49.5% (p < 0.0001) than in adjacent tumor-free tissue. No differences in Se concentrations and GSH-Px activities were found between squamous cell carcinoma and adenocarcinoma nor among the clinical stages of the disease. In the whole blood and plasma of cancer patients significantly lower Se concentrations were found in smokers than in nonsmokers. Significantly lower Se concentrations were also found among cancer patients who were smokers compared with controls. These findings show that in the blood of cancer the antioxidant ability, as measured by Se and GSH-Px, is reduced significantly. The cause of increased Se and GSH-Px in the malignant part of the lung is not understood and requires further studies.

Adenocarcinoma↗