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Pancreatic Neoplasms: HELP
Articles by Giulia A. Zamboni
Based on 10 articles published since 2010
(Why 10 articles?)
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Between 2010 and 2020, G. A. Zamboni wrote the following 10 articles about Pancreatic Neoplasms.
 
+ Citations + Abstracts
1 Review Ultrasonography of the pancreas. 2012

Zamboni, Giulia A / Ambrosetti, Maria Chiara / D'Onofrio, Mirko / Pozzi Mucelli, Roberto. ·Istituto di Radiologia, Policlinico GB Rossi, Azienda Ospedaliera Universitaria Integrata Verona, P.le LA Scuro 10, 37134 Verona, Italy. gzamboni@hotmail.com ·Radiol Clin North Am · Pubmed #22560688.

ABSTRACT: Although the pancreas is often thought of as an organ that is difficult to explore using ultrasound (US), because of its deep retroperitoneal location, with the appropriate technique it can be studied successfully in most patients. In this article, the authors discuss the use of available US techniques in the diagnosis of the most common pancreatic diseases, the use of US intraoperatively, and the use of sonographic guidance for diagnostic and therapeutic procedures. The authors also briefly discuss the potential use of elastosonography techniques in the evaluation of pancreatic disease.

2 Article Dislocation of intra-abdominal drains after pancreatic surgery: results of a prospective observational study. 2019

Marchegiani, Giovanni / Ramera, Marco / Viviani, Elena / Lombardo, Fabio / Cybulski, Adam / Chincarini, Marco / Malleo, Giuseppe / Bassi, Claudio / Zamboni, Giulia A / Salvia, Roberto. ·Department of General and Pancreatic Surgery, The Pancreas Institute, University and Hospital Trust of Verona, Verona, Italy. · Department of Radiology, The Pancreas Institute, University and Hospital Trust of Verona, Verona, Italy. · Department of General and Pancreatic Surgery, The Pancreas Institute, University and Hospital Trust of Verona, Verona, Italy. claudio.bassi@univr.it. · Department of General and Pancreatic Surgery, "GB Rossi" Hospital, University of Verona, Piazzale L.A. Scuro, 10, 37134, Verona, Italy. claudio.bassi@univr.it. ·Langenbecks Arch Surg · Pubmed #30771076.

ABSTRACT: PURPOSE: The use of intra-abdominal drains after major surgical procedures represents a well-established but controversial practice. No data are available regarding both the occurrence and the potential impact of their postoperative accidental dislocation. The aim of this study is to assess the actual rate of dislocation of intra-abdominal drains postoperatively and to evaluate its clinical impact. METHODS: This is a prospective observational study using major pancreatic surgery as a model. Ninety-one consecutive patients undergoing pancreatoduodenectomy (PD) or distal pancreatectomy (DP) underwent low-dose, non-enhanced computed tomography (LDCT) on postoperative days (POD) 1 and 3 in a blinded fashion to assess the position of drains. We compared the outcomes of patients with dislocated and correctly placed drains. RESULTS: Overall, drains were dislocated in 30 patients (33%), without differences between PD and DP. Most of dislocations were already present on POD 1 (77%). Postoperative complications occurred in 57% of patients, and the rate of postoperative pancreatic fistula (POPF) was 27%. The dislocated cohort had lesser morbidity (40% vs. 66%; relative risk (RR), 0.35; 95% CI, 0.14-0.86; P = 0.020), and the rate of POPF (3% vs. 39%, respectively; RR, 0.05; 95% CI, 0.01-0.42; P < 0.001). After PD, patients with dislocated drains had a shorter hospital stay (12 vs. 20 days; P = 0.015). No significant differences in terms of need for percutaneous drainage procedures, abdominal collections, or grade C POPFs were found between the groups. CONCLUSIONS: Dislocation of intra-abdominal drains is an early and frequent event after major pancreatic resection. Its occurrence might protect against the negative effects of maintaining drainage, eventually leading to better postoperative outcomes. This data reinforces the knowledge that surgical drains might be detrimental in selected cases.

3 Article Correlation between appearance of the retroportal fat plane at preoperative CT and pathology findings in resected adenocarcinoma of the pancreatic head. 2019

Lombardo, F / Zamboni, G A / Bonatti, M / Chincarini, M / Ambrosetti, M C / Marchegiani, G / Malleo, G / Mansueto, G / Pozzi Mucelli, R. ·Department of Radiology, University of Verona, Piazzale L.A. Scuro 10, 37134, Verona, Italy. Electronic address: fabio.lombardo@me.com. · Department of Radiology, University of Verona, Piazzale L.A. Scuro 10, 37134, Verona, Italy. · Department of Radiology, Ospedale Centrale di Bolzano, Via L. Boehler 5, 39100 Bolzano, Italy. · Department of Surgery, University of Verona, Piazzale L.A. Scuro 10, 37134, Verona, Italy. ·Clin Radiol · Pubmed #30691733.

ABSTRACT: AIM: To correlate the appearance of the retroportal fat plane at preoperative computed tomography (CT) and the pathology findings in resected adenocarcinoma of the pancreatic head (PDAC). MATERIAL AND METHODS: Forty-eight patients with resected PDAC of the pancreatic head were included (24 men, 24 women, mean age 63 years, median BMI 24.1). All patients underwent CT <30 days before surgery. The state of the retroperitoneal resection margin and the presence of lymphatic or perineural invasion were obtained from pathology reports. CT images were reviewed independently by two radiologists for assessment of the retroportal fat plane and graded in two categories (clear/effaced). Inter-reader discrepancies were solved in consensus. Interobserver agreement was calculated and Fisher's test was used to assess the correlation between CT and pathology findings. Visceral fat areas were measured and correlated with CT findings. RESULTS: A clear retroportal fat plane was significantly associated with a negative retroperitoneal margin at pathology with 100% specificity and PPV (p=0.0001). No association was observed between the appearance of the fat plane at CT and the presence of lymphatic or perineural invasion (p=ns). Interobserver agreement for retroportal fat plane evaluation was good (0.741). False-positive cases had a significantly lower visceral fat area than the correctly classified patients (p=0.0480). CONCLUSIONS: A clear retroportal fat plane is significantly associated with negative retroperitoneal resection margins at pathology. The lack of visceral adipose tissue can lead to overestimation of retroportal fat plane involvement at preoperative CT.

4 Article Paraduodenal pancreatitis as a mimicker of pancreatic adenocarcinoma: MRI evaluation. 2017

Boninsegna, Enrico / Negrelli, Riccardo / Zamboni, Giulia A / Tedesco, Giorgia / Manfredi, Riccardo / Pozzi Mucelli, Roberto. ·Department of Radiology, Policlinico G.B. Rossi, University of Verona, Italy. Electronic address: boninsegnae@gmail.com. · Department of Radiology, Policlinico G.B. Rossi, University of Verona, Italy. · Department of Radiology, Policlinico A. Gemelli, Catholic University, Rome, Italy. ·Eur J Radiol · Pubmed #28987673.

ABSTRACT: PURPOSE: To evaluate the MRI features of paraduodenal pancreatitis (PDP) and to define useful signs to differentiate PDP from pancreatic ductal adenocarcinoma (PDAC). MATERIAL AND METHODS: We reviewed the MRI scans of 56 patients, 28 affected by PDP and 28 by PDAC, all pathologically proven. The following parameters were evaluated: signal intensity of the lesion on T1-, T2-WI, DWI (b800) and after contrast medium administration; presence of cysts; dilation of common hepatic duct and main pancreatic duct; focal thickening of the second portion of the duodenum; maximum diameter and volume of the lesion. RESULTS: Both PDPs and PDACs were more frequently hypointense on T1-WI, iso-hyperintense on T2-WI, hypointense in the pancreatic phase and iso-hypointense in the venous phase (p>0.05); in the delayed phase most PDP were hyperintense (p=0.0031); on DWI 71.4% PDPs were isointense and all PDACs were hyperintense (p=0.0041). Cystic components were present in 85.7% PDPs (p=0.0011); double duct sign was present in 50% PDACs (p=0.0048); focal thickening of the duodenum was depicted in 89.3 PDPs (p=0.0012). PDPs were larger than PDACs (p=0.0003). CONCLUSION: The most suggestive signs of PDP are: signal hyperintensity in the delayed phase, isointensity on DWI, presence of cysts, focal thickening of the duodenum and large size of the lesion.

5 Article Solid non-functioning endocrine tumors of the pancreas: correlating computed tomography and pathology. 2017

Zamboni, Giulia A / Ambrosetti, Maria Chiara / Zivelonghi, Caterina / Lombardo, Fabio / Butturini, Giovanni / Cingarlini, Sara / Capelli, Paola / Pozzi Mucelli, Roberto. ·Istituto di Radiologia, DAI Patologia e Diagnostica, Policlinico GB Rossi, AOUI Verona, Verona, Italy. Electronic address: gzamboni@hotmail.com. · Istituto di Radiologia, DAI Patologia e Diagnostica, Policlinico GB Rossi, AOUI Verona, Verona, Italy. · Chirurgia Generale e Del Pancreas, DAI Chirurgia e Oncologia, Istituto Del Pancreas, Policlinico GB Rossi, AOUI Verona, Verona, Italy. · Oncologia Medica, DAI Chirurgia e Oncologia, Policlinico GB Rossi, AOUI Verona, Verona, Italy. · UOC Anatomia e Istologia Patologica, DAI Patologia e Diagnostica, Policlinico GB Rossi, AOUI Verona, Verona, Italy. ·HPB (Oxford) · Pubmed #28784262.

ABSTRACT: BACKGROUND: Since prognosis and treatment of pancreatic endocrine tumors (pNET) are based on tumor grade, contrast-enhanced multidetector computed tomography (MDCT) features of solid non-functioning pNETs were studied and correlated with pathology tumor grading. METHODS: MDCTs of diagnosed pNETs were reviewed retrospectively. Each tumor was analyzed for location, size, homogeneity, margins, arterial and venous phase enhancement, main pancreatic duct diameter, calcifications, vascular invasion, lymph-nodes enlargement, and liver metastases. RESULTS: Of 154 pNETs presenting between January 2000 and May 2016 with available histology from resected specimen or biopsy, there were 65 G1, 72 G2 and 17 G3 pNETs. Tumor diameter varied significantly between the three groups. Tumors >20 mm were more frequently malignant and non-homogeneous than smaller tumors. G1 tumors were more commonly hypervascular and G3 tumors more often non-hypervascular in the arterial phase. Arterial phase non-hyperdensity and tumor non-homogeneity had a higher rate of metastatic lesions. Vascular invasion correlated with presence of metastases and histological grade. G3 tumors were all >20 mm (p = 0.007), more often non-hypervascular in the arterial phase (p = 0.0025), and non-hyperdense in the venous phase (p = 0.009), and showed more often vascular invasion (p = 0.0198). CONCLUSION: CT correlated with tumor grade; differentiating low-grade and high-grade pNETs through routine CT imaging might improve patient management.

6 Article Pancreatic Neuroendocrine Neoplasms: Clinical Value of Diffusion-Weighted Imaging. 2016

De Robertis, Riccardo / D'Onofrio, Mirko / Zamboni, Giulia / Tinazzi Martini, Paolo / Gobbo, Stefano / Capelli, Paola / Butturini, Giovanni / Girelli, Roberto / Ortolani, Silvia / Cingarlini, Sara / Pederzoli, Paolo / Scarpa, Aldo. ·Department of Radiology, Casa di cura Pederzoli, Peschiera del Garda, Italy. ·Neuroendocrinology · Pubmed #26646652.

ABSTRACT: BACKGROUND/AIMS: Diffusion-weighted imaging (DWI) can depict random motions of water molecules in biological tissues during magnetic resonance (MR) examinations. Few papers have tested its application to pancreatic neuroendocrine neoplasms (PanNENs). The aim of this paper is to assess the clinical value of DWI regarding the identification and characterization of PanNENs and diagnosis of liver metastases. METHODS: Preoperative MR examinations of 30 PanNEN patients were retrospectively reviewed; 30 patients with pathologically proven pancreatic ductal adenocarcinoma (PDAC) were included to compare the imaging features. Qualitative and quantitative MR features were compared between histotypes. A blinded-reader comparison of diagnostic confidence for PanNENs and liver metastases was conducted on randomized image sets. All results were compared with pathological data. RESULTS: PanNEN conspicuity was higher on DW images compared to conventional MR sequences. DWI had higher detection rates for PanNENs than had conventional sequences (93.3 vs. 71.1%). Sharp margins and absence of main pancreatic duct/common bile duct dilation and chronic pancreatitis were more common among PanNENs as compared to PDACs. Arterial iso- or hyperenhancement and portal hyperenhancement were more frequent within PanNENs as compared to PDACs. No differences between histotypes were found for quantitative features. Arterial-phase images had the highest interobserver agreement for the diagnosis of PanNEN (Cohen's κ = 0.667). DWI provided the highest detection rate for liver metastases as well as excellent interobserver agreement for the diagnosis of liver metastases (κ = 0.932), with good accuracy (AUC = 0.879-0.869). CONCLUSION: DWI has clinical value regarding the identification of PanNENs and the diagnosis of liver metastases, while conventional MR sequences are fundamental for their characterization.

7 Article Distribution of liver metastases based on the site of primary pancreatic carcinoma. 2016

Ambrosetti, Maria Chiara / Zamboni, Giulia A / Mucelli, Roberto Pozzi. ·Istituto di Radiologia, Policlinico GB Rossi, Azienda Ospedaliera Universitaria Integrata di Verona, P. le LA Scuro 10, 37134, Verona, Italy. mchiara.ambrosetti@gmail.com. · Istituto di Radiologia, Policlinico GB Rossi, Azienda Ospedaliera Universitaria Integrata di Verona, P. le LA Scuro 10, 37134, Verona, Italy. ·Eur Radiol · Pubmed #26017740.

ABSTRACT: OBJECTIVES: To investigate whether the different location of pancreatic adenocarcinoma affects the lobar distribution of metastases to the liver. METHODS: From all patients who underwent multidetector computed tomography (MDCT) examinations for staging of pancreatic adenocarcinoma in the last 4 years we selected 80 patients (42 men, 38 women; mean age, 60.56 years) with liver metastases and a pancreatic adenocarcinoma of the head (group A, 40 patients; diameter, 32.41 ± 2.28 mm) or body-tail (group B, 40 patients; diameter, 52.21 ± 2.8 mm). We analysed tumour site, diameter, vascular invasion and number of metastases in each lobe of the liver. The total number of metastases was compared between the two groups with an unpaired t-test, while Fisher's test was used to compare the number of metastases within the two lobes. RESULTS: As expected, the number of liver metastases was higher in group B than in group A. The ratio of metastases in the right-to-left hemi-liver was 7.4:1 for group A compared with 3.3:1 for group B (p < 0.0001). CONCLUSIONS: Although the number of liver metastases is higher in the right lobe than in the left lobe in both groups, there is a significant difference in the ratio of metastases between the right and the left hemi-liver. This supports the existence of a streamline phenomenon and a selective lobar distribution of metastases within the liver. KEY POINTS: • Pancreatic adenocarcinoma presents with liver metastases in 40% of cases • The presence of liver metastases disqualifies the patient from curative surgery • The distribution of metastases within the liver depends on the site of pancreatic adenocarcinoma • The distribution of liver metastases is due to the streamline phenomenon.

8 Article Single-energy low-voltage arterial phase MDCT scanning increases conspicuity of adenocarcinoma of the pancreas. 2014

Zamboni, Giulia A / Ambrosetti, Maria Chiara / Guariglia, Stefania / Cavedon, Carlo / Pozzi Mucelli, Roberto. ·Istituto di Radiologia, Policlinico GB Rossi, Azienda Ospedaliera Universitaria Integrata di Verona, P.le LA Scuro 10, 37134 Verona, Italy. Electronic address: gzamboni@hotmail.com. · Istituto di Radiologia, Policlinico GB Rossi, Azienda Ospedaliera Universitaria Integrata di Verona, P.le LA Scuro 10, 37134 Verona, Italy. Electronic address: mchiara.ambrosetti@gmail.com. · U.O. di Fisica Sanitaria, Azienda Ospedaliera Universitaria Integrata di Verona, P.le Stefani 1, 37126 Verona, Italy. Electronic address: guariglia@gmail.com. · U.O. di Fisica Sanitaria, Azienda Ospedaliera Universitaria Integrata di Verona, P.le Stefani 1, 37126 Verona, Italy. Electronic address: carlo.cavedon@ospedaleuniverona.it. · Istituto di Radiologia, Policlinico GB Rossi, Azienda Ospedaliera Universitaria Integrata di Verona, P.le LA Scuro 10, 37134 Verona, Italy. Electronic address: roberto.pozzimucelli@univr.it. ·Eur J Radiol · Pubmed #24447420.

ABSTRACT: PURPOSE: To test a single-energy low-voltage CT protocol for pancreatic adenocarcinoma. METHODS AND MATERIALS: A total of 30 patients with pathology-proven pancreatic adenocarcinoma underwent 64-row MDCT with arterial phase at 80 kV and were compared to a similar group of 30 patients scanned with a 120 kV protocol. Scans were compared for quantitative image parameters (attenuation and standard deviation in the pancreas, tumor, aorta), CTDI and DLP using an unpaired t-test. Image noise values for each protocol (SD of the psoas) were compared using an unpaired t-test. Effective dose was calculated for each protocol. CNR (=conspicuity/SDnoise) and FOM (CNR2/ED) were calculated. The Catphan600 phantom was used to evaluate image non-uniformity, noise, spatial resolution, and low contrast detectability. RESULTS: Mean patient weight was 68 kg in the study group and 73 kg in the control group (p=0.0355), while patient diameters at the celiac axis were not significantly different. Mean attenuation was significantly higher at 80 kV in the aorta (517.5±116.4 vs 290.3±76.4 HU) and normal pancreas (154.0±39.95 vs 90.02±19.01 HU) (all p<0.0001), while no significant difference was observed for adenocarcinoma (61.43±35.61 vs 47.45±18.95; p=n.s.). CTDI and DLP were significantly lower at 80 kV (6.00±0.90 mGy vs 10.24±2.93 mGy, and 180.4±35.49 mGy cm vs 383.8±117 mGy cm, respectively; all p<0.0001). Tumor conspicuity (HUpancreas-HUtumor) was significantly higher at 80 kV (94.2±39.3 vs 39.5±22 HU; p<0.0001). Mean image noise was significantly higher at 80kV (28.32±10.06 vs 19.7±7.1HU; p<0.0001). Effective dose was significantly lower at 80 kV (1.984±0.39 vs 5.75±1.75 mSv; p<0.0001). The total DLP for the exam was 1024±31.86 mGy cm for the 80 kV protocol and 1357±62.60 mGy cm for the 120 kV protocol (p<0.0001). Phantoms showed higher non-uniformity, slightly higher noise, slightly lower MTF (50%) and slightly higher percentage contrast for the 80 kV protocol. CONCLUSION: Single-source 80 kV pancreatic phase scanning results in higher conspicuity of pancreatic adenocarcinoma and FOM and in significant dose reduction while maintaining acceptable image quality.

9 Article Perfusion CT can predict tumoral grading of pancreatic adenocarcinoma. 2013

D'Onofrio, M / Gallotti, A / Mantovani, W / Crosara, S / Manfrin, E / Falconi, M / Ventriglia, A / Zamboni, G A / Manfredi, R / Pozzi Mucelli, R. ·Department of Radiology, University Hospital G.B. Rossi Piazzale L.A. Scuro 10, 37134 University of Verona, Verona, Italy. mirko.donofrio@univr.it ·Eur J Radiol · Pubmed #23127804.

ABSTRACT: OBJECTIVES: To describe perfusion CT features of locally advanced pancreatic ductal adenocarcinoma and to evaluate correlation with tumor grading. METHODS: Thirty-two patients with locally advanced pancreatic adenocarcinoma were included in this study. Lesions were evaluated by P-CT and biopsy after patient's informed consent. P-CT parameters have been assessed on a large single and on 6 small intratumoral ROIs. Values obtained have been compared and related to the tumor grading using Mann-Whitney U test. Sensibility, specificity, positive predictive value (PPV), negative predictive value (NPV) and accuracy in predicting tumor grading have been calculated for cut-off values chosen by using ROC curves. RESULTS: Out of 32 lesions, 12 were classified as low grade and 20 as high grade. A statistically significant difference between high and low grade neoplasms were demonstrated for PEI and BV parameters. PEI and BV cut-off values were respectively 17.8 HU and 14.8 ml/100g. PEI identified high grade neoplasms with a 65% sensitivity, 92% specificity, 93% PPV, 61% NPV and 75% accuracy. BV identified high grade neoplasms with a 80% sensitivity, 75% specificity, 84% PPV, 69% NPV, 78% accuracy. Considering both PEI and BV, P-CT identified high grade lesions with a 60% sensitivity, 100% specificity, 100% PPV, 60% NPV and 75% accuracy. CONCLUSIONS: PEI and BV perfusion CT parameters proved their efficiency in identifying high grade pancreatic adenocarcinoma.

10 Article Pancreatic multicenter ultrasound study (PAMUS). 2012

D'Onofrio, Mirko / Barbi, Emilio / Dietrich, Christoph F / Kitano, Masayuki / Numata, Kazushi / Sofuni, Atsushi / Principe, Francesco / Gallotti, Anna / Zamboni, Giulia A / Mucelli, Roberto Pozzi. ·Department of Radiology, University Hospital G.B. Rossi, University of Verona, Italy. mirko.donofrio@univr.it ·Eur J Radiol · Pubmed #21466935.

ABSTRACT: AIM: To describe the typical CEUS pattern of pancreatic lesions and to evaluate the diagnostic accuracy of Contrast-enhanced ultrasound (CEUS) in their characterization. MATERIALS AND METHODS: All US and CEUS examinations of focal pancreatic masses performed in six centers during a period of five years were reviewed. Inclusion criteria were: focal pancreatic mass pathologically proved, visible at ultrasound (US) and studied with CEUS. All lesions were then evaluated for size, aspect and enhancement pattern. Sensitivity, specificity, positive and negative predictive values with 95% CIs were calculated to define diagnostic accuracy of CEUS in respect to pathology. Diagnostic confidence of US and CEUS, discerning between benign and malignant lesions, were represented by using ROC (receiver operating characteristics) curves. Agreement was evaluated by means of k statistics. RESULTS: 1439 pancreatic lesions were included. At CEUS the lesions were divided into solid (89%) and cystic (12%) masses and classified into six and eight categories, respectively. Among the solid lesions, adenocarcinomas were characterized with an accuracy of 87.8%. Among the cystic lesions, cystic tumors were diagnosed with an accuracy of 97.1%. ROC curve area increased from 0.637 for US to 0.877 for CEUS (p<0.0001). Inter-observer agreement was slightly higher for solid (k=0.78) than cystic (k=0.62) lesions. In none of the centers side effects were reported. CONCLUSION: CEUS is accurate in the characterization of pancreatic lesions. CEUS should be considered as a complementary imaging method for pancreatic lesions characterization.