Outcomes of Planned Marginal and Wide Resection of Sarcomas Associated with Major Vascular Structures in Extremities

2021 ◽  
Author(s):  
Ahmet Fevzi Kekeç ◽  
İlknur Günaydın ◽  
Recep Öztürk ◽  
Bedii Şafak Güngör
Keyword(s):  
Wide Resection ◽  
Vascular Structures

scholarly journals Polymer Nanoparticle-Based Chemotherapy for Spinal Malignancies

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Hongyun Ma ◽  
Weiqian Jiang ◽  
Jianxun Ding ◽  
Mingqiang Li ◽  
Yilong Cheng ◽  
...  
Keyword(s):  
Synergetic Effect ◽  
Polymer Nanoparticles ◽  
Spinal Tumors ◽  
Wide Resection ◽  
High Morbidity ◽  
Polymer Nanoparticle ◽  
Adjacent Structures ◽  
Vascular Structures ◽  
Stimuli Response

Malignant spinal tumors, categorized into primary and metastatic ones, are one of the most serious diseases due to their high morbidity and mortality rates. Common primary spinal tumors include chordoma, chondrosarcoma, osteosarcoma, Ewing’s sarcoma, and multiple myeloma. Spinal malignancies are not only locally invasive and destructive to adjacent structures, such as bone, neural, and vascular structures, but also disruptive to distant organs (e.g., lung). Current treatments for spinal malignancies, including wide resection, radiotherapy, and chemotherapy, have made significant progress like improving patients’ quality of life. Among them, chemotherapy plays an important role, but its potential for clinical application is limited by severe side effects and drug resistance. To ameliorate the current situation, various polymer nanoparticles have been developed as promising excipients to facilitate the effective treatment of spinal malignancies by utilizing their potent advantages, for example, targeting, stimuli response, and synergetic effect. This review overviews the development of polymer nanoparticles for antineoplastic delivery in the treatment of spinal malignancies and discusses future prospects of polymer nanoparticle-based treatment methods.

Bioengineered in vitro Vascular Models for Applications in Interventional Radiology

2019 ◽  
Vol 24 (45) ◽  
pp. 5367-5374 ◽  
Author(s):  
Xiaoyun Li ◽  
Seyed M. Moosavi-Basri ◽  
Rahul Sheth ◽  
Xiaoying Wang ◽  
Yu S. Zhang
Keyword(s):  
Interventional Radiology ◽  
Animal Models ◽  
Blood Vessels ◽  
In Vitro Models ◽  
The Past ◽  
Endovascular Interventions ◽  
Conventional Animal ◽  
Vascular Structures

The role of endovascular interventions has progressed rapidly over the past several decades. While animal models have long-served as the mainstay for the advancement of this field, the use of in vitro models has become increasingly widely adopted with recent advances in engineering technologies. Here, we review the strategies, mainly including bioprinting and microfabrication, which allow for fabrication of biomimetic vascular models that will potentially serve to supplement the conventional animal models for convenient investigations of endovascular interventions. Besides normal blood vessels, those in diseased states, such as thrombosis, may also be modeled by integrating cues that simulate the microenvironment of vascular disorders. These novel engineering strategies for the development of biomimetic in vitro vascular structures will possibly enable unconventional means of studying complex endovascular intervention problems that are otherwise hard to address using existing models.

Variations and Abnormalities of Major Thoracic Vascular Structures

2014 ◽  
Vol 10 (2) ◽  
pp. 113-118
Author(s):  
Abdurrahman Oran ◽  
Cemil Goya ◽  
Hasan Nazaroglu
Keyword(s):  
Vascular Structures

scholarly journals Structure-function relationships in the feto-placental circulation from in silico interpretation of micro-CT vascular structures

Placenta ◽  
2019 ◽  
Vol 83 ◽  
pp. e84
Author(s):  
Monika Byrne ◽  
Rosalind Aughwane ◽  
Joanna James ◽  
Ciaran Hutchinson ◽  
Owen Arthurs ◽  
...  
Keyword(s):  
Structure Function ◽  
In Silico ◽  
Micro Ct ◽  
Vascular Structures

scholarly journals Efficacy of perioperative chemotherapy for synovial sarcoma: a retrospective analysis of a Nationwide database in Japan

BMC Cancer ◽  
2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Gang Xu ◽  
Hisaki Aiba ◽  
Norio Yamamoto ◽  
Katsuhiro Hayashi ◽  
Akihiko Takeuchi ◽  
...  
Keyword(s):  
Overall Survival ◽  
Synovial Sarcoma ◽  
Survival Rates ◽  
Surgical Margin ◽  
Oncologic Outcomes ◽  
Wide Resection ◽  
Perioperative Chemotherapy ◽  
Relapse Free Survival ◽  
Free Survival ◽  
Distant Relapse

Abstract Background Synovial sarcoma is an aggressive but chemosensitive soft-tissue tumor. We retrospectively analyzed the efficacy of perioperative chemotherapy for synovial sarcoma with data from the nationwide database, Bone and Soft Tissue Tumor Registry in Japan. Methods This study included 316 patients diagnosed with synovial sarcoma between 2006 and 2012. Oncologic outcomes were analyzed using a Cox-hazard regression model. Moreover, the effects of perioperative chemotherapy on outcomes were evaluated using a matched-pair analysis. The oncologic outcomes of patients who did or did not receive chemotherapy were compared (cx + and cx-). Results Multivariate analysis revealed significant correlations of age (over 40, hazard ratio [HR] = 0.61, p = 0.043), margin status (marginal resection, HR = 0.18, p < 0.001 and intralesional resection, HR = 0.30, p = 0.013 versus wide resection) with overall survival; surgical margin type (marginal resection, HR = 0.14, p = 0.001 and intralesional resection, HR = 0.09, p = 0.035 versus wide resection) with local recurrence; and postoperative local recurrence (HR = 0.30, p = 0.027) and surgical margin (marginal resection, HR = 0.31, p = 0.023 versus wide resection) with distant relapse-free survival. Before propensity score matching, perioperative chemotherapy was mainly administered for young patients and patients with deeper tumor locations, larger tumors, more advanced-stage disease, and trunk location. The 3-year overall survival, local control, and distant relapse-free survival rates were 79.8%/89.3% (HR = 0.64, p = 0.114), 89.6%/93.0% (HR = 0.37, p = 0.171) and 71.4%/84.5% (HR = 0.60, p = 0.089) in the cx+/cx- groups, respectively. After propensity score matching, 152 patients were selected such that the patient demographics were nearly identical in both groups. The 3-year overall survival, local control, and distant relapse-free survival rates were 71.5%/86.0% (HR = 0.48, p = 0.055), 92.5%/93.3% (HR = 0.51, p = 0.436) and 68.4%/83.9% (HR = 0.47, p = 0.046) in the cx+/cx- groups, respectively. Conclusion This large-sample study indicated that the margin status and postoperative disease control were associated directly or indirectly with improved oncologic outcomes. However, the efficacy of perioperative chemotherapy for survival outcomes in synovial sarcoma patients was not proven in this Japanese database analysis.

scholarly journals Rapid synchronized fabrication of vascularized thermosets and composites

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Mayank Garg ◽  
Jia En Aw ◽  
Xiang Zhang ◽  
Polette J. Centellas ◽  
Leon M. Dean ◽  
...  
Keyword(s):  
Large Scale ◽  
Capillary Flow ◽  
External Heat ◽  
Frontal Polymerization ◽  
Self Healing ◽  
Vascular Networks ◽  
Ambient Conditions ◽  
External Energy ◽  
Imaging Phantoms ◽  
Vascular Structures

AbstractBioinspired vascular networks transport heat and mass in hydrogels, microfluidic devices, self-healing and self-cooling structures, filters, and flow batteries. Lengthy, multistep fabrication processes involving solvents, external heat, and vacuum hinder large-scale application of vascular networks in structural materials. Here, we report the rapid (seconds to minutes), scalable, and synchronized fabrication of vascular thermosets and fiber-reinforced composites under ambient conditions. The exothermic frontal polymerization (FP) of a liquid or gelled resin facilitates coordinated depolymerization of an embedded sacrificial template to create host structures with high-fidelity interconnected microchannels. The chemical energy released during matrix polymerization eliminates the need for a sustained external heat source and greatly reduces external energy consumption for processing. Programming the rate of depolymerization of the sacrificial thermoplastic to match the kinetics of FP has the potential to significantly expedite the fabrication of vascular structures with extended lifetimes, microreactors, and imaging phantoms for understanding capillary flow in biological systems.

Neurosurgical anatomy of the floor of the third ventricle and related vascular structures

2021 ◽  
Author(s):  
João Fernandes-Silva ◽  
Susana M. Silva ◽  
Hélio Alves ◽  
José P. Andrade ◽  
Mavilde Arantes
Keyword(s):  
Third Ventricle ◽  
The Third ◽  
Vascular Structures

Can the Human Tail Cause Arteriovenous Hemangioma?

2020 ◽  
pp. 1-5
Author(s):  
Pinar Aydin Ozturk ◽  
Seyhmus Kaya
Keyword(s):  
Skin Color ◽  
Squamous Epithelium ◽  
Normal Skin ◽  
Distal Portion ◽  
Vascular Lesion ◽  
Pathological Findings ◽  
Lumbosacral Region ◽  
Fibrous Stroma ◽  
Human Tail ◽  
Vascular Structures

<b><i>Introduction:</i></b> “Human tail” is a congenital, benign anomaly in which a protrusion in the lumbosacrococcygeal caudal region is covered with skin. Arteriovenous hemangioma is a benign vascular lesion that may be congenital or acquired. We present a case in which a human tail was present with pathological findings of arteriovenous hemangioma. <b><i>Case Report:</i></b> A 6-month-old girl was born with a curved tail-shaped protrusion along her waistline. The distal portion was purple and had a solid consistency; the proximal portion was of normal skin color and had a soft consistency. No other abnormality was observed in the spinal area. Microscopic examination revealed congested, proliferated vascular structures in the fibrous stroma distally located under the multilayered squamous epithelium. In the proximal area, mature lipomatous tissue was observed. The lesion was diagnosed as arteriovenous hemangioma. <b><i>Conclusion:</i></b> Our patient presented with the classic “human tail” appearance at an early age and in the lumbosacral region. Because of the pathological findings, surgery for the congenital anomaly had to be performed with extra caution.

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