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Pancreatic Neoplasms: HELP
Articles by Z. Kala
Based on 7 articles published since 2010
(Why 7 articles?)
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Between 2010 and 2020, Z. Kala wrote the following 7 articles about Pancreatic Neoplasms.
 
+ Citations + Abstracts
1 Article Analysis of Blood Plasma MicroRNAs to Enable Identification of Patients with Pancreatic Ductal Adenocarcinoma Who Will Benefit from Surgical Resection 2019

Gablo N., A / Procházka, V / Hlavsa, J / Kiss, I / Srovnal, J / Kala, Z / Slabý, O. · ·Klin Onkol · Pubmed #31064193.

ABSTRACT: BACKGROUND: Pancreatic ductal adenocarcinoma (PDAC) is the most common malignancy of pancreas, characterized by extremely poor prognosis largely due to problem with early diagnosis and lack of progress in personalization of therapy. Of all available treatment strategies, radical surgical resection of the tumour in its early stage remains the only possibility how to reach long-term survival. However, even a technically perfect surgical resection may still not provide a survival benefit for all PDAC patients. Appropriate selection of patients for surgical resection is one the important medical needs in management of PDAC patients. MATERIAL AND METHODS: To this study we enrolled 24 PDAC patients who underwent surgical resection and preoperatively collected their blood plasma specimends. Patients were divided into to two prognostic groups according to their overall survival - 12 patients with poor prognosis (median overall survival 10 months) and 12 patients with good prognosis (median overall survival 25 months). Small RNA sequencing technology was applied to screen for microRNAs (miRNA) with differential levels between both PDAC patients group. cDNA libraries were prepared using QIAseq miRNA Library Kit (Qiaqen) and sequencing by NextSeq500 instrument (Illumina). RESULTS: When miRNA expression profiles of the PDAC patients from good and poor prognostic groups were compared, 61 miRNAs were identified to have significantly different plasma levels between the two groups (p < 0.05). A total of 21 miRNAs showed increased expression and 40 miRNAs showed decreased expression in a group of patients with poor prognosis compared to patients with good prognosis. CONCLUSION: This study demonstrated differences in miRNA expression profiles in preoperative plasma specimens of PDAC patients with short and long overall survival. Our observations indicate that after independent validations plasma miRNAs might become useful biomarkers for identification of PDAC patients having clinical benefit from surgical resection of the tumour. This work was supported by Czech Ministry of Health, grant No. 16-31314A. All rights reserved. The authors declare they have no potential confl icts of interest concerning drugs, products, or services used in the study. The Editorial Board declares that the manuscript met the ICMJE recommendation for biomedical papers. Submitted: 8. 3. 2019 Accepted: 9. 3. 2019.

2 Article IgG4 Sclerosing Cholangitis - an Inflammation Imitating Tumour of the Pancreas and Biliary Tract. 2019

Peňázová, P / Andrašina, T / Novotný, I / Trna, J / Hemmelová, B / Kunovsky, L / Procházka, V / Kala, Z. · ·Klin Onkol · Pubmed #30995856.

ABSTRACT: BACKGROUND: Immunoglobulin (Ig) G4 associated sclerosing cholangitis is a rare inflammatory disease of the biliary tract. Although it is a very progressive condition, it responds to steroid therapy. IgG4 associated sclerosing cholangitis can mimic pancreatic carcinoma, cholangiocarcinoma, and primary sclerosing cholangitis; therefore, it is very important to obtain a differential diagnosis. IgG4 sclerosing cholangitis is a biliary form of IgG4 related systemic disease, in which afflictions of more organs is afflictions of more organs are common, typically biliary form together with pancreatic one. Nonspecific symptoms are obstructive icterus, fatigue, and weight loss. Atypical imaging of the biliary tree and pancreas can be used to distinguish it from other diseases. Laboratory data show elevation of bilirubin, liver enzymes, IgG4 and total IgG concentrations. Sometimes IgE is also elevated with the eosinophilia, oncomarker CA 19-9 and autoimmune antibody is sometimes detected. CASE: This article presents a case of IgG4 sclerosing cholangitis and its related findings. The patient was intially referred for suspected pancreatic tumour, the presumed diagnosis was later changed to cholangiocarcinoma type 4 with concurrent autoimmune pancreatitis. Atypical imaging in cholangiography made us suspect IgG4 inflammation and the diagnostic process began. CONCLUSION: The diagnosis of this disease uses so called HISORt criteria. It is a very complex process in which the success of steroid therapy as a final step can be conclusive, as it was in our case. It is essential to exclude a malign neoplastic growth. The authors declare they have no potential confl icts of interest concerning drugs, products, or services used in the study. The Editorial Board declares that the manuscript met the ICMJE recommendation for biomedical papers. Submitted: 5. 12. 2018 Accepted: 10. 1. 2019.

3 Article Tumor grade as significant prognostic factor in pancreatic cancer: validation of a novel TNMG staging system. 2018

Hlavsa, J / Cecka, F / Zaruba, P / Zajak, J / Gurlich, R / Strnad, R / Pavlik, T / Kala, Z / Lovecek, M. ·Department of Surgery, University Hospital Brno Bohunice and Faculty of Medicine, Masaryk University, Brno, Czech Republic, Czech Republic · Department of Surgery, Faculty of Medicine in Hradec Kralove and University Hospital Hradec Kralove, Charles University, Hradec Kralove, Czech Republic · Department of Surgery, 2nd Faculty of Medicine of the Charles University and the Military University Hospital Prague, Charles University, Prague, Czech Republic · 3rd Department of Surgery, 1st Faculty of Medicine, Charles University in Prague and Motol University Hospital, Charles University, Prague, Czech Republic · Department of Surgery, University Hospital Kralovske Vinohrady, Charles University, Prague, Czech Republic · Institute of Biostatistics and Analysis, Faculty of Medicine and Faculty of Science, Masaryk University, Brno, Czech Republic · Surgery I, University Hospital Olomouc, Palacky University, Olomouc, Czech Republic ·Neoplasma · Pubmed #30064236.

ABSTRACT: Aim of the study was to asses the tumor grade prognostic value in the Czech pancreatic cancer patients and to evaluate the accuracy of TNMG prognostic model. Retrospective analysis of 431 pancreatic cancer patients undergoing pancreatic resection in seven Czech oncological centers between 2003 and 2013 was performed. The impact of tumor grade and the accuracy of TNMG prognostic model were evaluated. Lymph node status, tumor size, tumor stage and grade were proved as statistically significant survival predictors. The lower tumor differentiation (grade 3 and 4) was associated with poorer prognosis in all stages (stage I: HR 2.23 [1.14; 4.36, CI 95%] p=0.019, stage II: HR 3.09 [2.01; 4.77, CI 95%] p=0.001, stage III and IV: HR 3.52 [1.73; 7.18, CI 95%] p=0.001). Kaplan-Meier analysis verified statistically significant impact of new TNMG stages on survival after resection for pancreatic cancer (p=0.001). In conclusion, we can state that the tumor grade was confirmed as statistically significant prognostic factor in pancreatic cancer. Its incorporation into the current TNM classification enables more accurate prognosis prediction within particular clinical stages. That is why an inclusion of the grade to the standard TNM classification should be discussed.

4 Article Hedgehog pathway overexpression in pancreatic cancer is abrogated by new-generation taxoid SB-T-1216. 2017

Mohelnikova-Duchonova, B / Kocik, M / Duchonova, B / Brynychova, V / Oliverius, M / Hlavsa, J / Honsova, E / Mazanec, J / Kala, Z / Ojima, I / Hughes, D J / Doherty, J E / Murray, H A / Crockard, M A / Lemstrova, R / Soucek, P. ·Department of Toxicogenomics, National Institute of Public Health, Prague, Czech Republic. · Department of Oncology, Palacky University Medical School and Teaching Hospital, Olomouc, Czech Republic. · Department of Transplantation Surgery, Institute of Clinical and Experimental Medicine, Prague, Czech Republic. · Palacky University, Olomouc, Czech Republic. · Charles University in Prague, Prague, Czech Republic. · Department of Surgery, University Hospital and Medical Faculty, Masaryk University, Brno, Czech Republic. · Department of Clinical and Transplantation Pathology, Institute of Clinical and Experimental Medicine, Prague, Czech Republic. · Department of Pathology, University Hospital and Medical Faculty, Masaryk University, Brno, Czech Republic. · Institute of Chemical Biology and Drug Discovery, State University of New York at Stony Brook, Stony Brook, NY, USA. · Department of Physiology &Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin 2, Ireland. · Randox Laboratories, Crumlin, UK. ·Pharmacogenomics J · Pubmed #27573236.

ABSTRACT: The Hedgehog pathway is one of the major driver pathways in pancreatic ductal adenocarcinoma. This study investigated prognostic importance of Hedgehog signaling pathway in pancreatic cancer patients who underwent a radical resection. Tumors and adjacent non-neoplastic pancreatic tissues were obtained from 45 patients with histologically verified pancreatic cancer. The effect of experimental taxane chemotherapy on the expression of Hedgehog pathway was evaluated in vivo using a mouse xenograft model prepared using pancreatic cancer cell line Paca-44. Mice were treated by experimental Stony Brook Taxane SB-T-1216. The transcript profile of 34 Hedgehog pathway genes in patients and xenografts was assessed using quantitative PCR. The Hedgehog pathway was strongly overexpressed in pancreatic tumors and upregulation of SHH, IHH, HHAT and PTCH1 was associated with a trend toward decreased patient survival. No association of Hedgehog pathway expression with KRAS mutation status was found in tumors. Sonic hedgehog ligand was overexpressed, but all other downstream genes were downregulated by SB-T-1216 treatment in vivo. Suppression of HH pathway expression in vivo by taxane-based chemotherapy suggests a new mechanism of action for treatment of this aggressive tumor.

5 Article [Standardization of pancreatic cancer specimen pathological examination]. 2014

Hlavsa, J / Procházka, V / Mazanec, J / Hausnerová, J / Pavlík, T / Andrašina, T / Novotný, I / Penka, I / Kala, Z. · ·Rozhl Chir · Pubmed #24720716.

ABSTRACT: INTRODUCTION: The frequency of R1 resections for pancreatic cancer in studies where a non-standardized protocol of pathological evaluation of the specimen is used varies from 17 to 30%. The aim of our study is to apply the standardized (so-called Leeds) protocol of resected pancreatic specimen pathological examination, and to evaluate the frequency of R1 resections for pancreatic cancer using this new protocol. MATERIAL AND METHODS: Ninety-one patients who underwent pancreatoduodenectomy for pancreatic cancer were included in the study. This group was divided into two subgroups: patients examined by the Leeds protocol (n=20) and those examined by a non-standardized pathological protocol (n=71). The R1 resection rate was evaluated separately in each group. The positivity rate of every individual resection margin was specified in the Leeds protocol group. The correlation of R1 resection rate and "tumour - resection margin distance" parameter was evaluated. The tumour infiltration of peripancreatic adipose tissue was assessed in the non-standardized group. RESULTS: In the Leeds protocol subgroup, R1 and R0 resection rate was 60% (12/20) and 40% (8/20), respectively. Resection line positivity rates were as follows: dorsal 45% (9/20), ventral 35% (7/20), VMS 20% (4/20), cervical 20% (4/20), AMS 15% (3/20). The correlation between the tumour - resection line distance and R1 resection frequency was the following: direct infiltration 30% R1, tumour-resection margin border 0.5 mm 50% R1, 1mm 60%, 1.5 mm 75% R1, 2 mm 80% R1, >2 mm 80% R1. If the criterion of resection line positivity ( 1mm) was set, the R1 resection rate difference between the two groups was of statistical significance. In the subgroup where the non-standardized protocol was used (n=71), R1 resection was recorded in 25 (35.2%) patients. The main cancer-positive areas were peripancreatic adipose tissue in 26.8% (19/71) of cases, and VMS, AMS or retroperitoneal line in 8.5% (6/71), respectively. R0 resection was achieved in 46 (64.8%) patients. The statistically significant (p=0.046) difference in R0 and R1 resection rates was detected (Leeds protocol and non-standardized one: R0 40.0% vs. 64.8% and R1 60.0% vs. 35.2%, respectively) in the studied groups. CONCLUSION: The rate of R1 resections for pancreatic cancer increased in all studies, including ours, where the standardized (Leeds) protocol of pancreatic specimen pathological examination was used. The higher R1 resection rate when using the Leeds protocol is approaching to the local recurrence rate of pancreatic cancer. Therefore, the Leeds protocol can provide more realistic evaluation of local radicality of pancreatoduodenectomy and can also offer more accurate evaluation of the surgical and adjuvant therapy of pancreatic cancer.

6 Article [Radiofrequency ablation of pancreatic neuroendocrine tumor]. 2011

Hlavsa, J / Procházka, V / Kala, Z / Man, M / Andrasina, T / Cíhalová, M / Válek, V / Crha, M / Svobodová, I / Urbanová, L. ·Chirurgická klinika, LF MU a FN Brno-Bohunice. hlavsjan@seznam.cz ·Klin Onkol · Pubmed #21717790.

ABSTRACT: BACKGROUNDS: Pancreatic neuroendocrine tumors (PNETs) include a broad range of neoplasms spanning from relatively benign to malignant. Radical resection has been advocated as the only curative method. Debulking (R2) resection can be indicated for locally unresectable PNETs. Debulking surgery improves the quality of life and prolongs overall survival. The disadvantages of this approach include bleeding, pancreatic fistula and tumor spread. No alternative method that would eliminate these complications has been published yet. Considering the encouraging results of the studies describing radiofrequency ablation (RFA) of locally advanced pancreatic cancer, a question arises, whether it might be possible to use RFA as a R2 resection alternative in PNETs. CASE: A 73-year-old gentleman had been admitted due to abdominal pain and hyperglycaemic syndrome. Contrast-enhanced CT showed a tumor of pancreatic head invading portal vein (PV) and superior mesenteric vein (VMS). A surgery was indicated on the basis of EUS-guided FNAB that verified a PNET of uncertain biological behaviour. The surgery confirmed a locally advanced tumor of pancreatic head invading the PV and SMV. Due to the polymorbidity, radical pancreatoduodenectomy with SMV resection was not indicated. Because of the presence of symptoms, RFA of the PNET using ValleyLab generator with cooltip cluster electrode, was performed. Postoperative course was uneventful. Final immunohistochemical examination verified a well-differentiated grade 1 PNET. The patient was regularly monitored during a three-year follow-up. The quality of life was evaluated using standardized EORT QLQ-30 questionnaire. Pain was assessed by a ten-point visual analogue scale (VAS). Ablated area was evaluated annually by contrast-enhanced CT. Postoperatively, abdominal pain ceased (pain decrease from 2 to 0 on VAS). Insulin dose was reduced from 46 IU (international units) to 20 IU of Humulin-R per day. CT verified tumor regression according to RECIST (response evaluation criteria in solid tumors). During the three-year follow-up, no local progression or tumor dissemination was observed. CONCLUSION: We present the first case report of a patient with locally advanced symptomatic pancreatic neuroendocrine tumor successfully treated by intraoperative radiofrequency ablation. More clinical studies are needed to evaluate the clinical relevance of this cytoreductive method in the PNET indication.

7 Article Radical surgery for pancreatic malignancy in the elderly. 2010

Oliverius, M / Kala, Z / Varga, M / Gürlich, R / Lanska, V / Kubesova, H. ·Transplant Surgery Department, Institute for Clinical and Experimental Medicine, Prague, Czech Republic. maol@medicon.cz ·Pancreatology · Pubmed #20720452.

ABSTRACT: BACKGROUND: Improving life expectancy is associated with increasing incidence of pancreatic cancer. We reviewed morbidity and mortality in patients aged 65 years and older undergoing curative intent surgery in two centers in the Czech Republic. METHODS: Data were retrieved by retrospective analysis of the medical records over the period 2000-2007. In total, 60 patients were included. The mean age was 71 years (median 70 years; range 65-85 years). Most patients (43, 72%) underwent hemipancreatoduodenectomy, combined in 4 with portomesenterial vessel resection. Twelve patients (20%) had distal pancreatectomy and 5 patients (8%) total pancreatectomy. RESULTS: Overall morbidity was 28%. Only 10 patients (18%) developed serious surgical complications in terms of pancreatic leak (5, 8%), biliary leak (2, 3%), and intra-abdominal inflammatory collection (4, 7%). Four patients (6.6%) died within 30 days. The 1-year survival was 62.8%. CONCLUSION: We can conclude that age per se is not a contraindication to surgery. Patient's overall general condition, co-existing co-morbidities, and ability to get over with any potential complications are more important. and IAP.