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Pancreatic cancer imaging

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https://www.readbyqxmd.com/read/28420871/interactive-outlining-of-pancreatic-cancer-liver-metastases-in-ultrasound-images
#1
Jan Egger, Dieter Schmalstieg, Xiaojun Chen, Wolfram G Zoller, Alexander Hann
Ultrasound (US) is the most commonly used liver imaging modality worldwide. Due to its low cost, it is increasingly used in the follow-up of cancer patients with metastases localized in the liver. In this contribution, we present the results of an interactive segmentation approach for liver metastases in US acquisitions. A (semi-) automatic segmentation is still very challenging because of the low image quality and the low contrast between the metastasis and the surrounding liver tissue. Thus, the state of the art in clinical practice is still manual measurement and outlining of the metastases in the US images...
April 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28416744/real-time-near-infrared-fluorescence-imaging-using-crgd-zw800-1-for-intraoperative-visualization-of-multiple-cancer-types
#2
Henricus J M Handgraaf, Martin C Boonstra, Hendrica A J M Prevoo, Joeri Kuil, Mark W Bordo, Leonora S F Boogerd, Babs G Sibinga Mulder, Cornelis F M Sier, Maaike L Vinkenburg-van Slooten, A Rob P M Valentijn, Jacobus Burggraaf, Cornelis J H van de Velde, John V Frangioni, Alexander L Vahrmeijer
Incomplete resections and damage to critical structures increase morbidity and mortality of patients with cancer. Targeted intraoperative fluorescence imaging aids surgeons by providing real-time visualization of tumors and vital structures. This study evaluated the tumor-targeted zwitterionic near-infrared fluorescent peptide cRGD-ZW800-1 as tracer for intraoperative imaging of multiple cancer types. cRGD-ZW800-1 was validated in vitro on glioblastoma (U-87 MG) and colorectal (HT-29) cell lines. Subsequently, the tracer was tested in orthotopic mouse models with HT-29, breast (MCF-7), pancreatic (BxPC-3), and oral (OSC-19) tumors...
March 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28415140/imaging-modalities-for-characterising-focal-pancreatic-lesions
#3
REVIEW
Lawrence Mj Best, Vishal Rawji, Stephen P Pereira, Brian R Davidson, Kurinchi Selvan Gurusamy
BACKGROUND: Increasing numbers of incidental pancreatic lesions are being detected each year. Accurate characterisation of pancreatic lesions into benign, precancerous, and cancer masses is crucial in deciding whether to use treatment or surveillance. Distinguishing benign lesions from precancerous and cancerous lesions can prevent patients from undergoing unnecessary major surgery. Despite the importance of accurately classifying pancreatic lesions, there is no clear algorithm for management of focal pancreatic lesions...
April 17, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28414996/a-case-of-multiple-synchronous-quadruple-cancers-of-the-stomach-sigmoid-colon-rectum-and-pancreas
#4
Atsushi Nanashima, Tetsuro Tominaga, Takashi Nonaka, Kouki Wakata, Masaki Kunizaki, Shuichi Tobinaga, Yorihisa Sumida, Shigekazu Hidaka, Naoe Kinoshita, Terumitsu Sawai, Takeshi Nagayasu
INTRODUCTION: Multiple primary neoplasms are relatively rare, but their incidence has increased because of aging and improvements in diagnostic imaging. PRESENTATION OF CASE: A 67-year-old man presented with epigastric pain. On upper gastrointestinal endoscopy, an ulcer was seen at the gastric angle, and biopsy showed moderately differentiated adenocarcinoma (AC). Colonoscopy demonstrated a 15-mm lesion in the sigmoid colon and a submucosal lesion in the lower rectum...
April 2, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28414765/validation-of-full-field-optical-coherence-tomography-in-distinguishing-malignant-and-benign-tissue-in-resected-pancreatic-cancer-specimens
#5
Labrinus van Manen, Paulien L Stegehuis, Arantza Fariña-Sarasqueta, Lorraine M de Haan, Jeroen Eggermont, Bert A Bonsing, Hans Morreau, Boudewijn P F Lelieveldt, Cornelis J H van de Velde, Alexander L Vahrmeijer, Jouke Dijkstra, J Sven D Mieog
BACKGROUND: Pancreatic cancer is the fourth leading cause of cancer-related mortality in the United States. The minority of patients can undergo curative-intended surgical therapy due to progressive disease stage at time of diagnosis. Nonetheless, tumor involvement of surgical margins is seen in up to 70% of resections, being a strong negative prognostic factor. Real-time intraoperative imaging modalities may aid surgeons to obtain tumor-free resection margins. Full-field optical coherence tomography (FF-OCT) is a promising diagnostic tool using high-resolution white-light interference microscopy without tissue processing...
2017: PloS One
https://www.readbyqxmd.com/read/28414297/tumor-penetrating-peptide-enhances-transcytosis-of-silicasome-based-chemotherapy-for-pancreatic-cancer
#6
Xiangsheng Liu, Paulina Lin, Ian Perrett, Joshua Lin, Yu-Pei Liao, Chong Hyun Chang, Jinhong Jiang, Nanping Wu, Timothy Donahue, Zev Wainberg, Andre E Nel, Huan Meng
Pancreatic ductal adenocarcinoma (PDAC) is almost uniformly fatal; however, some improvement in overall survival has been achieved with the introduction of nanocarriers that deliver irinotecan or paclitaxel. Although it is generally assumed that nanocarriers rely principally on abnormal leaky vasculature for tumor access, a transcytosis transport pathway that is regulated by neuropilin-1 (NRP-1) has recently been reported. NRP-1-mediated transport can be triggered by the cyclic tumor-penetrating peptide iRGD...
April 17, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28407704/delayed-epidural-mucin-collection-after-surgery-for-spinal-metastatic-pancreatic-adenocarcinoma
#7
Dong Ha Kim, Dong Hwan Kim, Hwan Soo Kim, Kyoung Hyup Nam, Byung Kwan Choi, In Ho Han
A rare case of delayed large epidural mucin collection causing neurologic deficit after surgery for metastatic pancreatic cancer is reported. A 65-year-old man presented with intractable upper-thoracic back pain radiating to the chest and gait disturbance. He had a history of subtotal pancreatectomy due to intraductal papillary mucinous neoplasm (IPMN) of the pancreas and concurrent chemotherapy. Eight months after pancreatectomy, multiple thoracic spinal metastasis was diagnosed with routine up positron emission tomography-computed tomography...
March 2017: Korean Journal of Spine
https://www.readbyqxmd.com/read/28407088/borderline-resectable-pancreatic-cancer-conceptual-evolution-and-current-approach-to-image-based-classification
#8
J W Gilbert, B Wolpin, T Clancy, J Wang, H Mamon, A B Shinagare, J Jagannathan, M Rosenthal
BACKGROUND: Diagnostic imaging plays a critical role in the initial diagnosis and therapeutic monitoring of pancreatic adenocarcinoma. Over the past decade, the concept of "borderline resectable" pancreatic cancer has emerged to describe a distinct subset of patients existing along the spectrum from resectable to locally advanced disease for whom a microscopically margin-positive (R1) resection is considered relatively more likely, primarily due to the relationship of the primary tumor with surrounding vasculature...
April 12, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/28405146/simultaneous-occurrence-of-autoimmune-pancreatitis-and-pancreatic-cancer-in-patients-resected-for-focal-pancreatic-mass
#9
Peter Macinga, Adela Pulkertova, Lukas Bajer, Jana Maluskova, Martin Oliverius, Martin Smejkal, Maria Heczkova, Julius Spicak, Tomas Hucl
AIM: To assess the occurrence of autoimmune pancreatitis (AIP) in pancreatic resections performed for focal pancreatic enlargement. METHODS: We performed a retrospective analysis of medical records of all patients who underwent pancreatic resection for a focal pancreatic enlargement at our tertiary center from January 2000 to July 2013. The indication for surgery was suspicion of a tumor based on clinical presentation, imaging findings and laboratory evaluations...
March 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28404017/dna-testing-of-pancreatic-cyst-fluid-is-it-ready-for-prime-time
#10
REVIEW
Aatur D Singhi, Marina N Nikiforova, Kevin McGrath
Pancreatic cysts are a clinical quandary in both diagnosis and management. Although many cysts, such as pseudocysts and serous cystadenomas, are benign and can be monitored clinically, mucinous cysts, such as intraductal papillary mucinous neoplasms and mucinous cystic neoplasms, have the potential to progress to pancreatic cancer. Considering the poor prognosis of pancreatic cancer, the detection of a pancreatic cyst can be a source of anxiety for both the patient and physician. This diagnosis in turn can lead to expensive, invasive, and even harmful surveillance and treatment options...
January 2017: Lancet. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28402267/contrast-enhanced-ultrasound-evaluation-of-pancreatic-cancer-xenografts-in-nude-mice-after-irradiation-with-sub-threshold-focused-ultrasound-for-tumor-ablation
#11
Yi Hui Gao, Lei Wu, Rui Wang, Qian Guo, Yi Ni Chen, Bing Hu, Li Xin Jiang
We evaluated the efficacy of contrast-enhanced ultrasound for assessing tumors after irradiation with sub-threshold focused ultrasound (FUS) ablation in pancreatic cancer xenografts in nude mice. Thirty tumor-bearing nude mice were divided into three groups: Group A received sham irradiation, Group B received a moderate-acoustic energy dose (sub-threshold), and Group C received a high-acoustic energy dose. In Group B, B-mode ultrasound (US), color Doppler US, and dynamic contrast-enhanced ultrasound (DCE-US) studies were conducted before and after irradiation...
March 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28390098/noninvasive-characterization-of-pancreatic-tumor-mouse-models-using-magnetic-resonance-imaging
#12
Navid Farr, Yak-Nam Wang, Samantha D'Andrea, Kayla M Gravelle, Joo Ha Hwang, Donghoon Lee
The preclinical models of pancreatic adenocarcinoma provide an alternative means for determining the mechanisms of malignancy and possibilities for treatments, thus representing a resource of immense potential for cancer treatment in medicine. To evaluate different tumor models, quantifiable magnetic resonance imaging (MRI) techniques can play a significant role in identifying valuable in vivo biomarkers of tumor characteristics. We characterized three models of pancreatic cancer with multiparametric MRI techniques...
April 7, 2017: Cancer Medicine
https://www.readbyqxmd.com/read/28388966/vaccination-with-poly-ic-lc-and-peptide-pulsed-autologous-dendritic-cells-in-patients-with-pancreatic-cancer
#13
Shikhar Mehrotra, Carolyn D Britten, Steve Chin, Elizabeth Garrett-Mayer, Colleen A Cloud, Mingli Li, Gina Scurti, Mohamed L Salem, Michelle H Nelson, Melanie B Thomas, Chrystal M Paulos, Andres M Salazar, Michael I Nishimura, Mark P Rubinstein, Zihai Li, David J Cole
BACKGROUND: Dendritic cells (DCs) enhance the quality of anti-tumor immune response in patients with cancer. Thus, we posit that DC-based immunotherapy, in conjunction with toll-like receptor (TLR)-3 agonist poly-ICLC, is a promising approach for harnessing immunity against metastatic or locally advanced unresectable pancreatic cancer (PC). METHODS: We generated autologous DCs from the peripheral blood of HLA-A2(+) patients with PC. DCs were pulsed with three distinct A2-restricted peptides: 1) human telomerase reverse transcriptase (hTERT, TERT572Y), 2) carcinoembryonic antigen (CEA; Cap1-6D), and 3) survivin (SRV...
April 7, 2017: Journal of Hematology & Oncology
https://www.readbyqxmd.com/read/28381539/transient-tissue-priming-via-rock-inhibition-uncouples-pancreatic-cancer-progression-sensitivity-to-chemotherapy-and-metastasis
#14
Claire Vennin, Venessa T Chin, Sean C Warren, Morghan C Lucas, David Herrmann, Astrid Magenau, Pauline Melenec, Stacey N Walters, Gonzalo Del Monte-Nieto, James R W Conway, Max Nobis, Amr H Allam, Rachael A McCloy, Nicola Currey, Mark Pinese, Alice Boulghourjian, Anaiis Zaratzian, Arne A S Adam, Celine Heu, Adnan M Nagrial, Angela Chou, Angela Steinmann, Alison Drury, Danielle Froio, Marc Giry-Laterriere, Nathanial L E Harris, Tri Phan, Rohit Jain, Wolfgang Weninger, Ewan J McGhee, Renee Whan, Amber L Johns, Jaswinder S Samra, Lorraine Chantrill, Anthony J Gill, Maija Kohonen-Corish, Richard P Harvey, Andrew V Biankin, T R Jeffry Evans, Kurt I Anderson, Shane T Grey, Christopher J Ormandy, David Gallego-Ortega, Yingxiao Wang, Michael S Samuel, Owen J Sansom, Andrew Burgess, Thomas R Cox, Jennifer P Morton, Marina Pajic, Paul Timpson
The emerging standard of care for patients with inoperable pancreatic cancer is a combination of cytotoxic drugs gemcitabine and Abraxane, but patient response remains moderate. Pancreatic cancer development and metastasis occur in complex settings, with reciprocal feedback from microenvironmental cues influencing both disease progression and drug response. Little is known about how sequential dual targeting of tumor tissue tension and vasculature before chemotherapy can affect tumor response. We used intravital imaging to assess how transient manipulation of the tumor tissue, or "priming," using the pharmaceutical Rho kinase inhibitor Fasudil affects response to chemotherapy...
April 5, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28378082/diagnostic-performance-of-endoscopic-ultrasound-for-detection-of-pancreatic-malignancy-following-an-indeterminate-multidetector-ct-scan-a-systemic-review-and-meta-analysis
#15
Somashekar G Krishna, Bhavana B Rao, Emmanuel Ugbarugba, Zarine K Shah, Alecia Blaszczak, Alice Hinton, Darwin L Conwell, Phil A Hart
BACKGROUND: Pancreatic ductal adenocarcinoma (PDAC) has a dismal prognosis in part due to delayed diagnosis. Even with advances in cross-sectional imaging, small pancreatic malignancies can be missed. We sought to determine the performance of endoscopic ultrasound (EUS) in those without an obvious mass on multi-detector CT scan (MDCT), but with clinical suspicion for pancreatic malignancy. METHODS: Multiple databases were systematically searched to identify studies that assessed the diagnostic performance of EUS after negative or inconclusive pancreatic protocol MDCT for detection of pancreatic malignancy when clinically suspected...
April 4, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28375667/addition-of-mri-for-ct-based-pancreatic-tumor-delineation-a-feasibility-study
#16
Oliver J Gurney-Champion, Eva Versteijne, Astrid van der Horst, Eelco Lens, Heidi Rütten, Hanne D Heerkens, Gabriel M R M Paardekooper, Maaike Berbee, Coen R N Rasch, Jaap Stoker, Marc R W Engelbrecht, Marcel van Herk, Aart J Nederveen, Remy Klaassen, Hanneke W M van Laarhoven, Geertjan van Tienhoven, Arjan Bel
PURPOSE: To assess the effect of additional magnetic resonance imaging (MRI) alongside the planning computed tomography (CT) scan on target volume delineation in pancreatic cancer patients. MATERIAL AND METHODS: Eight observers (radiation oncologists) from six institutions delineated the gross tumor volume (GTV) on 3DCT, and internal GTV (iGTV) on 4DCT of four pancreatic cancer patients, while MRI was available in a second window (CT + MRI). Variations in volume, generalized conformity index (CIgen), and overall observer variation, expressed as standard deviation (SD) of the distances between delineated surfaces, were analyzed...
April 4, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28373404/precancer-atlas-to-drive-precision-prevention-trials
#17
Avrum Spira, Matthew B Yurgelun, Ludmil Alexandrov, Anjana Rao, Rafael Bejar, Kornelia Polyak, Marios Giannakis, Ali Shilatifard, Olivera J Finn, Madhav Dhodapkar, Neil E Kay, Esteban Braggio, Eduardo Vilar, Sarah A Mazzilli, Timothy R Rebbeck, Judy E Garber, Victor E Velculescu, Mary L Disis, Douglas C Wallace, Scott M Lippman
Cancer development is a complex process driven by inherited and acquired molecular and cellular alterations. Prevention is the holy grail of cancer elimination, but making this a reality will take a fundamental rethinking and deep understanding of premalignant biology. In this Perspective, we propose a national concerted effort to create a Precancer Atlas (PCA), integrating multi-omics and immunity - basic tenets of the neoplastic process. The biology of neoplasia caused by germline mutations has led to paradigm-changing precision prevention efforts, including: tumor testing for mismatch repair (MMR) deficiency in Lynch syndrome establishing a new paradigm, combinatorial chemoprevention efficacy in familial adenomatous polyposis (FAP), signal of benefit from imaging-based early detection research in high-germline risk for pancreatic neoplasia, elucidating early ontogeny in BRCA1-mutation carriers leading to an international breast cancer prevention trial, and insights into the intricate germline-somatic-immunity interaction landscape...
April 1, 2017: Cancer Research
https://www.readbyqxmd.com/read/28370884/detecting-in-vivo-urokinase-plasminogen-activator-activity-with-a-catalycest-mri-contrast-agent
#18
Sanhita Sinharay, Christine M Howison, Amanda F Baker, Mark D Pagel
Urokinase plasminogen activator (uPA) promotes tumor invasion and metastasis. The monitoring of uPA activity using molecular imaging may have prognostic value and be predictive for response to anti-cancer therapies. However, the detection of in vivo enzyme activity with molecular imaging remains a challenge. To address this problem, we designed a nonmetallic contrast agent, GR-4Am-SA, that can be detected with chemical exchange saturation transfer (CEST) MRI. This agent has a peptide that is cleaved by uPA, which causes a CEST signal at 5...
March 29, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28368405/connexin-43-channels-are-a-pathway-for-discharging-lactate-from-glycolytic-pancreatic-ductal-adenocarcinoma-cells
#19
T H Dovmark, M Saccomano, A Hulikova, F Alves, P Swietach
Glycolytic cancer cells produce large quantities of lactate that must be removed to sustain metabolism in the absence of oxidative phosphorylation. The only venting mechanism described to do this at an adequate rate is H(+)-coupled lactate efflux on monocarboxylate transporters (MCTs). Outward MCT activity is, however, thermodynamically inhibited by extracellular acidity, a hallmark of solid tumours. This inhibition would feedback unfavourably on metabolism and growth, raising the possibility that other venting mechanisms become important in under-perfused tumours...
April 3, 2017: Oncogene
https://www.readbyqxmd.com/read/28355739/-value-of-multi-slice-spiral-ct-in-preoperative-diagnosis-of-pancreatic-cancer
#20
G L Feng, H J Jiang, J P Li, H Jiang, W B Pan
Objective: To analyze the diagnostic value of multi-slice spiral computed tomography (MSCT) in preoperative tumor staging, lymphatic metastasis, vascular invasion and perineural invasion. Methods: From January 2013 to December 2015, MSCT images of 87 patients from the Second Hospital of Harbin Medical University who were examined by contrast-enhanced MSCT and diagnosed as pancreatic cancer by surgical pathology within 2 weeks were collected.MSCT images were retrospectively analyzed to evaluate the tumor staging, lymphatic metastasis, vascular invasion and perineural invasion and then compared with surgical pathology...
March 21, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
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