scholarly journals Pattern of Computerized Tomographic Findings in Suspected Gallbladder Cancer in Nigeria

2021 ◽  
Vol 7 (2) ◽  
pp. 86-94
Author(s):  
MA Olusola-Bello ◽  
AA Olatunji ◽  
OI Ajayi ◽  
AO Adekoya
Keyword(s):  
Gall Bladder ◽  
Early Stage ◽  
Intrahepatic Metastasis ◽  
Preoperative Imaging ◽  
Wall Thickening ◽  
Female Ratio ◽  
Non Invasive ◽  
Diagnostic Facility ◽  
Rare Malignancy ◽  
Mass Lesions

Background: Gallbladder (GB) cancer is a rare malignancy with a variable incidence worldwide. Imaging detection at an early stage is elusive. Preoperative imaging for tumour recognition and non-invasive staging is essential to triage patients to appropriate care. Objectives: To describe the CT imaging findings of GB cancer among Nigerians. Methods: A retrospective review of the CT images of 15 patients who had gall bladder carcinoma between January 2015 and June 2017 at a private diagnostic facility in Lagos was done. Results: The age of the patients ranged from 39 to 73 years with a mean age of 60.9 years. The male to female ratio was 1:4.3. Clinical presentations included abdominal pain (61.5%) and jaundice (38.5%). Irregular GB wall thickening (61.5%) and focal mass lesions in the GB (38.5%) were the main features on imaging while 38.5% had associated gall stones. Infiltration of the adjacent liver was found in 76.9% and 60 % of those who had local infiltration of the liver also had intrahepatic metastasis. Conclusion: A majority of gall bladder cancer cases are still diagnosed in their late stages. CT scan readily delineates regional spread into adjacent organs which may be obscured in other imaging modalities due to adjacent bowel gas.

scholarly journals Gall bladder wall thickening as non-invasive screening parameter for esophageal varices – a comparative endoscopic – sonographic study

2018 ◽  
Vol 18 (1) ◽  
Author(s):  
Birgit Tsaknakis ◽  
Rawan Masri ◽  
Ahmad Amanzada ◽  
Golo Petzold ◽  
Volker Ellenrieder ◽  
...  
Keyword(s):  
Gall Bladder ◽  
Esophageal Varices ◽  
Bladder Wall ◽  
Wall Thickening ◽  
Non Invasive ◽  
Screening Parameter ◽  
Gall Bladder Wall

scholarly journals Evaluation of the Gallbladder Wall Thickening as a Non-invasive Predictor of Esophageal Varices in Cirrhotic Patients

2021 ◽  
pp. 1-9
Author(s):  
Nora M. Shehata ◽  
Alsiagy A. AbdelAziz ◽  
Medhat Abd El-Megid ◽  
Yasser M. Hafez
Keyword(s):  
Gall Bladder ◽  
Portal Vein ◽  
Wall Thickness ◽  
Esophageal Varices ◽  
Bladder Wall ◽  
Wall Thickening ◽  
P Value ◽  
Bladder Wall Thickness ◽  
Non Invasive ◽  
Cirrhotic Patients

Background: Liver cirrhosis represent the end stage of fibrosis that destroy normal liver parenchyma and leads to serious complication as portal hypertension which result in esophageal varices (EV), EV bleeding leads to high mortality, so repeated upper endoscopy needed to control bleeding which is invasive procedure and of high risk of hazards as infection. Our Study Aimed: to evaluate the Gallbladder Wall Thickening (GBWT) as a non-invasive predictor of Esophageal Varices (EV) in cirrhotic patients. Methods: In this cross sectional study, we tested 120 cirrhotic patients at gastroenterology and hepatology unit, internal medicine department, Tanta university hospitals. They were divided into 60 cirrhotic patients with EV and 60 cirrhotic patients without EV. All patients were subjected to history taking,  physical examination, investigation (complete blood count, liver function tests, viral markers) ultrasound detecting (gall bladder wall thickness, portal vein diameter, portal vein flow velocity, portal cross sectional area and gall bladder fasting volume) upper gastrointestinal endoscopy to detect presence or absence of varices. Results: Significant correlation was observed between gall bladder wall thickness (GBWT) and portal hypertension, GBWT ranged from 2.5 to 7 mm in group 2 (cirrhotic patients with EV) and from 1.5 to 5 in group 1( cirrhotic patients without EV). There is significant difference between group 1 and group 2 as regard GBWT with (P value < 0.05), portal vein diameter (PVD) with (P value <0.05) and platelets counts with (P value <0.05). Conclusions: We recommend thatgall bladder wall thickness can be used as a non-invasive predictor of esophageal varices in cirrhotic patients.

Review of Various Tasks Performed in the Preprocessing Phase of a Diabetic Retinopathy Diagnosis System

2020 ◽  
Vol 16 (4) ◽  
pp. 397-426
Author(s):  
Muhammad Nadeem Ashraf ◽  
Muhammad Hussain ◽  
Zulfiqar Habib
Keyword(s):  
Diabetic Retinopathy ◽  
Blood Vessels ◽  
Early Stage ◽  
Spherical Shape ◽  
Cost Effective ◽  
Lesion Detection ◽  
Diabetic Patients ◽  
Cad System ◽  
Non Invasive ◽  
Optic Discs

Diabetic Retinopathy (DR) is a major cause of blindness in diabetic patients. The increasing population of diabetic patients and difficulty to diagnose it at an early stage are limiting the screening capabilities of manual diagnosis by ophthalmologists. Color fundus images are widely used to detect DR lesions due to their comfortable, cost-effective and non-invasive acquisition procedure. Computer Aided Diagnosis (CAD) of DR based on these images can assist ophthalmologists and help in saving many sight years of diabetic patients. In a CAD system, preprocessing is a crucial phase, which significantly affects its performance. Commonly used preprocessing operations are the enhancement of poor contrast, balancing the illumination imbalance due to the spherical shape of a retina, noise reduction, image resizing to support multi-resolution, color normalization, extraction of a field of view (FOV), etc. Also, the presence of blood vessels and optic discs makes the lesion detection more challenging because these two artifacts exhibit specific attributes, which are similar to those of DR lesions. Preprocessing operations can be broadly divided into three categories: 1) fixing the native defects, 2) segmentation of blood vessels, and 3) localization and segmentation of optic discs. This paper presents a review of the state-of-the-art preprocessing techniques related to three categories of operations, highlighting their significant aspects and limitations. The survey is concluded with the most effective preprocessing methods, which have been shown to improve the accuracy and efficiency of the CAD systems.

scholarly journals Role of MSCT in the diagnosis of perforated gall bladder (a retrospective study)

2020 ◽  
Vol 51 (1) ◽  
Author(s):  
Mohamed M. Harraz ◽  
Ahmed H. Abouissa
Keyword(s):  
Computed Tomography ◽  
Retrospective Study ◽  
Gall Bladder ◽  
Acute Cholecystitis ◽  
Acute Diverticulitis ◽  
Wall Thickening ◽  
Free Fluid ◽  
Iodinated Contrast ◽  
Contrast Enhanced

Abstract Background Although gall bladder perforation (GBP) is not common, it is considered a life-threating condition, and the possibility of occurrence in cases of acute cholecystitis must be considered. The aim of this study was to assess the role of multi-slice computed tomography (MSCT) in the assessment of GBP. Results It is a retrospective study including 19 patients that had GBP out of 147, there were 11 females (57.8%) and 8 males (42.1%), aged 42 to 79 year (mean age 60) presented with acute abdomen or acute cholecystitis. All patients were examined with abdominal ultrasonography and contrast-enhanced abdominal MSCT after written informed consent was obtained from the patients. This study was between January and December 2018. Patients with contraindications to contrast-enhanced computed tomography (CT) (pregnancy, acute kidney failure, or allergy to iodinated contrast agents) who underwent US only were excluded. Patients with other diagnoses, such as acute diverticulitis of the right-sided colon or acute appendicitis, were excluded. The radiological findings were evaluated such as GB distention; stones; wall thickening, enhancement, and defect; pericholecystic free fluid or collection; enhancement of liver parenchyma; and air in the wall or lumen. All CT findings are compared with the surgical results. Our results revealed that the most important and diagnostic MSCT finding in GBP is a mural defect. Nineteen patients were proved surgically to have GBP. Conclusion GBP is a rare but very serious condition and should be diagnosed and treated as soon as possible to decrease morbidity and mortality. The most accurate diagnostic tool is the CT, MSCT findings most specific and sensitive for the detection of GBP and its complications.

scholarly journals Increasing Electric Vehicles Reliability by Non-Invasive Diagnosis of Motor Winding Faults

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2510
Author(s):  
Konrad Górny ◽  
Piotr Kuwałek ◽  
Wojciech Pietrowski
Keyword(s):  
Electric Vehicles ◽  
Diagnostic Method ◽  
Induction Motors ◽  
Early Stage ◽  
Short Circuit ◽  
Damage Classification ◽  
Non Invasive ◽  
Signal Features ◽  
Empirical Wavelet Transform ◽  
Simulation Results

The article proposes a proprietary approach to the diagnosis of induction motors allowing increasing the reliability of electric vehicles. This approach makes it possible to detect damage in the form of an inter-turn short-circuit at an early stage of its occurrence. The authors of the article describe an effective diagnostic method using the extraction of diagnostic signal features using an Enhanced Empirical Wavelet Transform and an algorithm based on the method of Ensemble Bagged Trees. The article describes in detail the methodology of the carried out research, presents the method of extracting features from the diagnostic signal and describes the conclusions resulting from the research. Phase current waveforms obtained from a real object as well as simulation results based on the field-circuit model of an induction motor were used as a diagnostic signal in the research. In order to determine the accuracy of the damage classification, simple metrics such as accuracy, sensitivity, selectivity, precision as well as complex metrics weight F1 and macro F1 were used.

scholarly journals Panel of serum miRNAs as potential non-invasive biomarkers for pancreatic ductal adenocarcinoma

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Imteyaz Ahmad Khan ◽  
Safoora Rashid ◽  
Nidhi Singh ◽  
Sumaira Rashid ◽  
Vishwajeet Singh ◽  
...  
Keyword(s):  
Next Generation Sequencing ◽  
Pancreatic Ductal Adenocarcinoma ◽  
Early Stage ◽  
Ductal Adenocarcinoma ◽  
Next Generation ◽  
Serum Samples ◽  
Tissue Samples ◽  
Non Invasive ◽  
Specific Symptoms ◽  
Generation Sequencing

AbstractEarly-stage diagnosis of pancreatic ductal adenocarcinoma (PDAC) is difficult due to non-specific symptoms. Circulating miRNAs in body fluids have been emerging as potential non-invasive biomarkers for diagnosis of many cancers. Thus, this study aimed to assess a panel of miRNAs for their ability to differentiate PDAC from chronic pancreatitis (CP), a benign inflammatory condition of the pancreas. Next-generation sequencing was performed to identify miRNAs present in 60 FFPE tissue samples (27 PDAC, 23 CP and 10 normal pancreatic tissues). Four up-regulated miRNAs (miR-215-5p, miR-122-5p, miR-192-5p, and miR-181a-2-3p) and four down-regulated miRNAs (miR-30b-5p, miR-216b-5p, miR-320b, and miR-214-5p) in PDAC compared to CP were selected based on next-generation sequencing results. The levels of these 8 differentially expressed miRNAs were measured by qRT-PCR in 125 serum samples (50 PDAC, 50 CP, and 25 healthy controls (HC)). The results showed significant upregulation of miR-215-5p, miR-122-5p, and miR-192-5p in PDAC serum samples. In contrast, levels of miR-30b-5p and miR-320b were significantly lower in PDAC as compared to CP and HC. ROC analysis showed that these 5 miRNAs can distinguish PDAC from both CP and HC. Hence, this panel can serve as a non-invasive biomarker for the early detection of PDAC.

Small animal Review

2021 ◽  
Vol 26 (2) ◽  
pp. 1-1
Author(s):  
Bryn Tennant
Keyword(s):  
Gall Bladder ◽  
Small Animal ◽  
Supplemental Oxygen ◽  
High Flow ◽  
Non Invasive

Summary: In the Small Animal Review, we summarise three papers published recently in other veterinary journals. This month includes a paper on creating antibiograms, pathogenesis of gall bladder mucocoeles and using non-invasive high-flow nasal catheters to provide supplemental oxygen in hypoxemic animals.

scholarly journals Circulating serum exosomal miR-20b-5p and miR-3187-5p as efficient diagnostic biomarkers for early-stage non-small cell lung cancer

2020 ◽  
Vol 245 (16) ◽  
pp. 1428-1436
Author(s):  
Zhi-Jun Zhang ◽  
Xing-Guo Song ◽  
Li Xie ◽  
Kang-Yu Wang ◽  
You-Yong Tang ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Small Cell Lung Cancer ◽  
Cell Lung Cancer ◽  
Early Stage ◽  
Small Cell ◽  
Small Cell Lung ◽  
Diagnostic Biomarkers ◽  
Non Invasive ◽  
Early Stage Nsclc ◽  
Nsclc Patients

Circulating exosomal microRNAs (ExmiRNAs) provide an ideal non-invasive method for cancer diagnosis. In this study, we evaluated two circulating ExmiRNAs in NSCLC patients as a diagnostic tool for early-stage non-small lung cancer (NSCLC). The exosomes were characterized by qNano, transmission electron microscopy, and Western blot, and the ExmiRNA expression was measured by microarrays. The differentially expressed miRNAs were verified by RT-qPCR using peripheral blood specimens from NSCLC patients ( n = 276, 0 and I stage: n = 104) and healthy donors ( n = 282). The diagnostic values were measured by receiver operating characteristic (ROC) analysis. The results show that the expression of both ExmiR-20b-5p and ExmiR-3187-5p was drastically reduced in NSCLC patients. The area under the ROC curve (AUC) was determined to be 0.818 and 0.690 for ExmiR-20b-5p and ExmiR-3187-5p, respectively. When these two ExmiRNAs were combined, the AUC increased to 0.848. When the ExmiRNAs were administered with either carcinoembryonic antigen (CEA) or cytokeratin-19-fragment (CYFRA21-1), the AUC was further improved to 0.905 and 0.894, respectively. Additionally, both ExmiR-20b-5p and ExmiR-3187-5p could be used to distinguish early stages NSCLC (0 and I stage) from the healthy controls. The ROC curves showed that the AUCs were 0.810 and 0.673, respectively. Combination of ExmiR-20b-5p and ExmiR-3187-5p enhanced the AUC to 0.838. When CEA and CYFRA21-1 were administered with the ExmiRNAs, the AUCs were improved to 0.930 and 0.928, respectively. In summary, circulating serum exosomal miR-20b-5p and miR-3187-5p could be used as effective, non-invasive biomarkers for the diagnosis of early-stage NSCLC, and the effects were further improved when the ExmiRNAs were combined. Impact statement The high mortality of non-small cell lung cancer (NSCLC) is mainly because the cancer has progressed to a more advanced stage before diagnosis. If NSCLC can be diagnosed at early stages, especially stage 0 or I, the overall survival rate will be largely improved by definitive treatment such as lobectomy. We herein validated two novel circulating serum ExmiRs as diagnostic biomarkers for early-stage NSCLC to fulfill the unmet medical need. Considering the number of specimens in this study, circulating serum exosomal miR-20b-5p and miR-3187-5p are putative NSCLC biomarkers, which need to be further investigated in a larger randomized controlled clinical trial.

scholarly journals Patterns of Gall Bladder Wall Thickening in Dengue Fever: A Mirror of the Severity of Disease

2017 ◽  
Vol 03 (02) ◽  
pp. E76-E81 ◽  
Author(s):  
Jitendra Parmar ◽  
Chander Mohan ◽  
Maulik Vora
Keyword(s):  
Gall Bladder ◽  
Dengue Fever ◽  
Bladder Wall ◽  
Warning Signs ◽  
Severe Dengue ◽  
Wall Thickening ◽  
Severity Of Disease ◽  
Gall Bladder Wall ◽  
Track Pattern ◽  
Honeycomb Pattern

Abstract Background Dengue fever is a major public health problem with an increased incidence in recent years. Gall bladder wall thickening has been reported as one of the most common findings in dengue fever. There is a paucity of literature regarding the various patterns of gall bladder wall thickening in dengue fever and their significance in predicting the severity of disease. Methodology and Significant Findings Out of 93 seropositive patients included in the study, 54 patients with dengue fever had gall bladder wall thickening. 4 patterns of gall bladder wall thickening are demonstrated in this study. A uniform echogenic pattern in 20 patients, striated or tram track pattern in 11 patients, an asymmetric pattern in 2 patients and a honeycombing pattern in 21 patients. The range of patterns of wall thickening included normal wall thickening or uniform echogenic wall thickening in DF without warning signs, a striated or tram track pattern, and a honeycomb pattern in severe DF. Serial ultrasound done on consecutive alternate days revealed a change in the pattern of gall bladder wall thickening according to the severity of disease. Conclusion The present study revealed 4 distinct patterns of gall bladder wall thickening. The uniform echogenic pattern was found to be more prevalent in dengue fever without warning signs, while the honeycomb pattern was found to be more prevalent in severe dengue fever. A change in the pattern of gall bladder wall thickening on subsequent serial ultrasound can predict the severity of the disease.

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