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Article ; Online: Editorial commentary: Abdominal aortic aneurysm - Size still matters.

Molacek, Jiri

2019 Volume 30, Issue 8, Page(s) 505–506

MeSH term(s)	Aortic Aneurysm, Abdominal/diagnostic imaging ; Aortic Aneurysm, Abdominal/epidemiology ; Humans
Language	English
Publishing date	2019-12-10
Publishing country	United States
Document type	Editorial ; Comment
ZDB-ID	1097434-9
ISSN	1873-2615 ; 1050-1738
ISSN (online)	1873-2615
ISSN	1050-1738
DOI	10.1016/j.tcm.2019.11.012
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Article: Unicentric form of Castleman´s disease, pitfalls of diagnosis and surgical treatment.

Molacek, Jiri / Treska, Vladislav / Skalicky, Tomas / Vodicka, Josef / Ferda, Jiri / Ferdova, Eva / Baxa, Jan / Mach, Christiana / Jungova, Alexandra / Michal, Michael

Frontiers in oncology

2023 Volume 13, Page(s) 1057683

Abstract: Background: Castleman´s disease is an extremely rare heterogenous lymphoproliferative pathology with a mostly benign behavior. It is a localized or generalized lymph node enlargement of an unknown aetiology. Unicentric form is typically a slow-growing ... ...

Abstract	Background: Castleman´s disease is an extremely rare heterogenous lymphoproliferative pathology with a mostly benign behavior. It is a localized or generalized lymph node enlargement of an unknown aetiology. Unicentric form is typically a slow-growing solitary mass occurring mostly in the mediastinum, abdominal cavity, retroperitoneum, pelvis and neck. Aetiology and pathogenesis of CD is probably diverse, varying in different types of this heterogeneous disease. Materials and methods: Authors present a review of this issue based on their extensive experience. The aim is to summarize the crucial factors in the management of diagnostics and a surgical treatment of the unicentric form of Castleman´s disease. One of the key issues in the unicentric form is precise preoperative diagnostics and thus choosing the right surgical treatment strategy. Authors highlight pitfalls of the diagnosis and surgical treatment. Results: All histological types such as a hyaline vascular type, plasmacytic type and a mixed type are presented as well as options of surgical and conservative treatment. Differential diagnosis and malignant potential is discussed. Conclusion: Patients with Castleman´s disease should be treated in the high- volume centers, with a great experience in major surgical procedures as well as with preoperative imaging diagnostic techniques. Specialized pathologists and oncologists focusing on this issue are also absolutely necessary to avoid misdiagnosis. Only this complex approach can lead to excellent outcomes in patients with UCD.
Language	English
Publishing date	2023-01-30
Publishing country	Switzerland
Document type	Systematic Review
ZDB-ID	2649216-7
ISSN	2234-943X
ISSN	2234-943X
DOI	10.3389/fonc.2023.1057683
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Article: Hormone receptor conversion in metastatic breast cancer.

Procházková, Kristýna / Vojtíšek, Radovan / Vodička, Josef / Horová, Jana / Hošek, Petr / Skála, Martin / Šebek, Jakub / Dostál, Jiří / Přibáň, Vladimír / Pivovarčíková, Kristýna / Hes, Ondřej / Třeška, Vladislav / Moláček, Jiří

Reports of practical oncology and radiotherapy : journal of Greatpoland Cancer Center in Poznan and Polish Society of Radiation Oncology

2024 Volume 28, Issue 6, Page(s) 746–755

Abstract: Background/objective: Hormone receptor (HR) status is one of the key factors in determining the treatment of breast cancer. Previous studies suggested that HR status may change in metastatic tissue. However, available studies focused mainly on primary ... ...

Abstract	Background/objective: Hormone receptor (HR) status is one of the key factors in determining the treatment of breast cancer. Previous studies suggested that HR status may change in metastatic tissue. However, available studies focused mainly on primary biopsies and there are only few trials comparing HR status in the primary tumour and the metastasis using material from complete resection. The aim of the study was to determine the frequency of HR alterations in metastatic breast cancer. Materials and methods: The study retrospectively examines a total of 50 patients who underwent brain, lung, or liver metastasectomy for metastatic breast cancer between January 2000 and January 2019. Results: HR conversion was observed in a total of 30 cases (60.0%), while HER-2/neu (human epidermal growth factor receptor 2) discrepancy surprisingly occurred only in one case (2.0%). A change in immunophenotype occurred in 28% of cases. Triple-negativity was more frequent in brain metastases (p = 0.039). Conclusions: We have confirmed that HR conversion between the primary tumour and its metastases occurs in a significant number of cases, which has important implications for further treatment decisions.
Language	English
Publishing date	2024-02-16
Publishing country	Poland
Document type	Journal Article
ZDB-ID	2188087-6
ISSN	1507-1367
ISSN	1507-1367
DOI	10.5603/rpor.98730
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Article: Littoral cell angioma of the spleen: A case report.

Opatrny, Vaclav / Treska, Vladislav / Waloschek, Tomas / Molacek, Jiri

SAGE open medical case reports

2020 Volume 8, Page(s) 2050313X20959874

Abstract: Spleen tumors are an uncommon disease. Littoral cell angioma belongs to the group of vascular tumors. It is believed that this tumor originates from the tissue of the red pulp sinuses, specifically from the cells that are lining the sinuses. If this rare ...

Abstract	Spleen tumors are an uncommon disease. Littoral cell angioma belongs to the group of vascular tumors. It is believed that this tumor originates from the tissue of the red pulp sinuses, specifically from the cells that are lining the sinuses. If this rare tumor is diagnosed, it is necessary to search for synchronous or metachronous visceral neoplasia. Littoral cell angioma can also mimic metastatic lesion of the spleen. This case report wants to draw attention on this rare tumor of the spleen which is very often associated with other visceral malignancy.
Language	English
Publishing date	2020-10-04
Publishing country	England
Document type	Case Reports
ZDB-ID	2736953-5
ISSN	2050-313X
ISSN	2050-313X
DOI	10.1177/2050313X20959874
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Article: Use of a Silver-Impregnated Vascular Graft: Single-Center Experience.

Molacek, Jiri / Treska, Vladislav / Houdek, Karel / Opatrný, Václav / Certik, Bohuslav / Baxa, Jan

Antibiotics (Basel, Switzerland)

2022 Volume 11, Issue 3

Abstract: Introduction: Vascular graft infection is a life threatening situation with significant morbidity and mortality. Bacterial graft infection can lead to false aneurysms, bleeding and sepsis. There are a lot of risky situations where grafts can become ... ...

Abstract	Introduction: Vascular graft infection is a life threatening situation with significant morbidity and mortality. Bacterial graft infection can lead to false aneurysms, bleeding and sepsis. There are a lot of risky situations where grafts can become infected. It is therefore highly desirable to have a vascular graft that is resistant to infection. In this retrospective clinical study, a silver-impregnated vascular graft was evaluated in various indications. Methods: Our study included a total of 71 patients who received a silver-impregnated vascular graft during the period from 2013 to 2018. Patients had an aortoiliac localization of vascular graft in 61 cases (86%), and a peripheral localization on the lower limbs in 10 cases (14%). Indications for the use of these special vascular grafts were trophic lesions or gangrene in the lower limbs in 24 cases (34%), suspicious mycotic abdominal aortic aneurysm (mAAA) in 4 cases (5.5%), salmonela aortitis or aneurysms in 4 cases (5.5%), infection of the previous vascular graft in 11 cases (15.5%), other infections in 12 cases (17%), AAA rupture in 10 cases (14%) and other reasons (pre-transplant condition, multiple trauma, graft-enteric fistula) in 6 cases (8.5%). Thirty-day mortality, morbidity, the need for reintervention and amputation, primary and secondary graft patency, and finally the presence of a proven vascular graft infection were evaluated. Results: The 30-day mortality was 19.7%, and morbidity was 42.2%. The primary patency of the vascular graft was 91.5%. Reoperation was necessary in 10 cases (14%) and amputation was necessary in 10 cases (14%). The median length of hospital stay was 13 days and the mean follow-up period was 48 ± 9 months. During the follow-up period, six patients (8.5%) died from reasons unrelated to surgery or without any relation to the vascular graft. Secondary patency after one year was 88%. Infection of the silver graft was observed in three patients (4.2%). Conclusions: Based on our results, the silver graft is a very suitable alternative for solving infectious, or potentially infectious, situations in vascular surgery. In particular, in urgent or acute cases, a silver graft is often the only option.
Language	English
Publishing date	2022-03-15
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2681345-2
ISSN	2079-6382
ISSN	2079-6382
DOI	10.3390/antibiotics11030386
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Article ; Online: The Impacts of the Sterilization Method and the Electrospinning Conditions of Nanofibrous Biodegradable Layers on Their Degradation and Hemocompatibility Behavior.

Havlickova, Kristyna / Kuzelova Kostakova, Eva / Lisnenko, Maxim / Hauzerova, Sarka / Stuchlik, Martin / Vrchovecka, Stanislava / Vistejnova, Lucie / Molacek, Jiri / Lukas, David / Prochazkova, Renata / Horakova, Jana / Jakubkova, Sarka / Heczkova, Bohdana / Jencova, Vera

Polymers

2024 Volume 16, Issue 8

Abstract: The use of electrospun polymeric biodegradable materials for medical applications is becoming increasingly widespread. One of the most important parameters regarding the functionality of nanofiber scaffolds during implantation and the subsequent ... ...

Abstract	The use of electrospun polymeric biodegradable materials for medical applications is becoming increasingly widespread. One of the most important parameters regarding the functionality of nanofiber scaffolds during implantation and the subsequent regeneration of damaged tissues concerns their stability and degradation behavior, both of which are influenced by a wide range of factors (the properties of the polymer and the polymer solution, the technological processing approach, the sterilization method, etc.). This study monitored the degradation of nanofibrous materials fabricated from degradable polyesters as a result of the sterilization method applied (ethylene oxide and gamma irradiation) and the solvent system used to prepare the spun polymer solution. Aliphatic polyesters PCL and PLCL were chosen for this study and selected with respect to the applicability and handling in the surgical setting of these nanofibrous materials for vascular bandaging. The results revealed that the choice of solvent system exerts a significant impact on degradation during sterilization, especially at higher gamma irradiation values. The subsequent enzyme-catalyzed degradation of the materials following sterilization indicated that the choice of the sterilization method influenced the degradation behavior of the materials. Whereas wave-like degradation was evident concerning ethylene oxide sterilization, no such behavior was observed following gamma-irradiation sterilization. With concern for some of the tested materials, the results also indicated the potential for influencing the development of degradation within the bulk versus degradation from the surface of the material. Both the sterilization method and the choice of the spinning solvent system were found to impact degradation, which was observed to be most accelerated in the case of PLCL (L-lactide-co-caprolactone copolymer) electrospun from organic acids and subsequently sterilized using gamma irradiation. Since we planned to use these materials in cardiovascular applications, it was decided that their hemocompatibility would also be tested. The results of these tests revealed that changes in the structures of the materials initiated by sterilization may exert thrombogenic and anticoagulant impacts. Moreover, the microscopic analysis suggested that the solvent system used in the preparation of the materials potentially affects the behavior of erythrocytes; however, no indication of the occurrence of hemolysis was detected.
Language	English
Publishing date	2024-04-09
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2527146-5
ISSN	2073-4360 ; 2073-4360
ISSN (online)	2073-4360
ISSN	2073-4360
DOI	10.3390/polym16081029
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Article ; Online: Littoral cell angioma of the spleen

Vaclav Opatrny / Vladislav Treska / Tomas Waloschek / Jiri Molacek

SAGE Open Medical Case Reports, Vol

A case report

2020 Volume 8

Abstract	Spleen tumors are an uncommon disease. Littoral cell angioma belongs to the group of vascular tumors. It is believed that this tumor originates from the tissue of the red pulp sinuses, specifically from the cells that are lining the sinuses. If this rare tumor is diagnosed, it is necessary to search for synchronous or metachronous visceral neoplasia. Littoral cell angioma can also mimic metastatic lesion of the spleen. This case report wants to draw attention on this rare tumor of the spleen which is very often associated with other visceral malignancy.
Keywords	Medicine (General) ; R5-920
Language	English
Publishing date	2020-10-01T00:00:00Z
Publisher	SAGE Publishing
Document type	Article ; Online
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Article ; Online: Perfusion of a Kidney Graft from a Donor After Cardiac Death Based on Immediately Started Machine Perfusion: An Experimental Study on a Big Animal.

Opatrný, Václav / Třeška, Vladislav / Zeithaml, Jan / Hes, Ondřej / Matějka, Roman / Moláček, Jiří

Transplantation proceedings

2021 Volume 53, Issue 6, Page(s) 2082–2090

Abstract: Background: Donation after circulatory death donors are becoming a common source of organs for transplant. Despite good long-term outcomes of grafts from donation after circulatory death, this group is affected by a higher occurrence of delayed graft ... ...

Abstract	Background: Donation after circulatory death donors are becoming a common source of organs for transplant. Despite good long-term outcomes of grafts from donation after circulatory death, this group is affected by a higher occurrence of delayed graft function and primary nonfunction. Our hypothesis is based on the assumption that washing the kidney grafts in the donor's body using a simple mechanical perfusion pump will result in faster and better perfusion of the parenchyma and more efficient cooling compared with hydrostatic perfusion alone. Methods: A total of 7 experimental animals (pigs) were used. The animals were divided into 2 groups: group A (n = 3) and group B (n = 4). After a 30-minute ischemic period for the selected kidney (clamped renal vessels), intra-arterial perfusion was performed. In group A perfusion was performed using hydrostatic pressure; in group B mechanical controlled perfusion was performed. After perfusion, declamping of the renal vessels caused restoration of flow. For graft quality evaluation, biopsy specimens were harvested, and the cooling speed was observed. Laboratory markers or renal failure were determined. Results: We found no significant differences between temperature drop and total diuresis between groups A and B. A significant difference was found between the groups in both flow parameters (flow maximum and mean flow) (P = .007, respectively P = .019). No laboratory parameters were found to be statistically significantly different. Histopathological analysis strongly supports the hypothesis of better flushing of kidney grafts using mechanical perfusion. Conclusions: Based on our results, better kidney graft quality can be expected after immediately started mechanical perfusion in situ.
MeSH term(s)	Animals ; Death ; Delayed Graft Function ; Graft Survival ; Kidney ; Kidney Transplantation ; Organ Preservation ; Perfusion ; Swine ; Tissue Donors
Language	English
Publishing date	2021-07-15
Publishing country	United States
Document type	Journal Article
ZDB-ID	82046-5
ISSN	1873-2623 ; 0041-1345
ISSN (online)	1873-2623
ISSN	0041-1345
DOI	10.1016/j.transproceed.2021.06.026
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Article: Abdominal aortic aneurysm in prostate cancer patients: the "road map" from incidental detection to advanced predictive, preventive, and personalized approach utilizing common follow-up for both pathologies.

Ferda, Jiri / Baxa, Jan / Ferdova, Eva / Kucera, Radek / Topolcan, Ondrej / Molacek, Jiri

The EPMA journal

2019 Volume 10, Issue 4, Page(s) 415–423

Abstract: Abdominal aortic aneurysm (AAA) is often a hidden pathological process showing no clinical symptoms. Genetic burden, smoking, male gender, age > 65 years, and white race have been identified as the main risk factors. A regular screening program has been ... ...

Abstract	Abdominal aortic aneurysm (AAA) is often a hidden pathological process showing no clinical symptoms. Genetic burden, smoking, male gender, age > 65 years, and white race have been identified as the main risk factors. A regular screening program has been introduced but is, as yet, unclear and is not performed in most countries. Prostate cancer is the most frequent male malignant disease in Western countries. Prostate cancer is a disease of older age with a median primary diagnosis of over 60 years. In recent years, advanced imaging methods have been established as important diagnostic tools in prostate cancer diagnostics. The incidental detection of AAA during diagnostic imaging performed due to prostate cancer diagnosis could reveal some asymptomatic aneurysms. Using our experience, the incidental detection of AAA during
Language	English
Publishing date	2019-11-26
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2545928-4
ISSN	1878-5085 ; 1878-5077
ISSN (online)	1878-5085
ISSN	1878-5077
DOI	10.1007/s13167-019-00193-y
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Article ; Online: Retrograde Oxygen Persufflation of Kidney - Experiment on an Animal.

Moláček, Jiri / Opatrný, Václav / Matějka, Roman / Baxa, Jan / Třeška, Vladislav

In vivo (Athens, Greece)

2017 Volume 30, Issue 6, Page(s) 801–805

Abstract: Aim: There is still a lack of organs for transplantation purposes. In the field of kidney and liver transplantation, one available solution is the use of organs from so-called marginal donors. These donors can be e.g. non-heart-beating donors. In these ... ...

Abstract	Aim: There is still a lack of organs for transplantation purposes. In the field of kidney and liver transplantation, one available solution is the use of organs from so-called marginal donors. These donors can be e.g. non-heart-beating donors. In these cases, perfusion and preservation of organs intended for transplantation is generally more difficult. Retrograde oxygen persufflation (ROP) may be a possible solution to this issue. This method is based on retrograde perfusion by oxygen through the renal vein thus reconditioning the organ. Materials and methods: We operated on 10 animals (porcine models). Ischemic injury of the right kidney was simulated in all animals. In group A (N=5), kidneys were perfused with retrograde oxygen persufflation after explantation. In group B (N=5), kidneys were perfused intrarterially as in usual clinical practice. After perfusion all kidneys were transplanted to the original donor animal. Quality of graft restitution was evaluated by the urea level obtained from the renal vein and by histopathological analysis after explantation. Results: We found no statistically significant differences between groups A and B in urea levels after transplantation, nor did we find any significant differences in quality of kidney parenchyma restoration between these groups. Conclusion: Retrograde oxygen persufflation is able to protect and restore kidney parenchyma.
MeSH term(s)	Animals ; Kidney/metabolism ; Kidney Transplantation/methods ; Male ; Organ Preservation/methods ; Oxygen/metabolism ; Perfusion/methods ; Portal Vein ; Reperfusion Injury/metabolism ; Sus scrofa ; Transplantation, Autologous
Chemical Substances	Oxygen (S88TT14065)
Language	English
Publishing date	2017-01-01
Publishing country	Greece
Document type	Journal Article
ZDB-ID	807031-3
ISSN	1791-7549 ; 0258-851X
ISSN (online)	1791-7549
ISSN	0258-851X
DOI	10.21873/invivo.10997
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