Ascitic Fluid Lactate Level as a Predictor of Mortality in Cirrhotic Patients Having Spontaneous Bacterial Peritonitis (SBP).

Introduction Limited studies are available for predicting mortality in patients with spontaneous bacterial peritonitis (SBP) based on ascitic fluid analysis. Recently, a proposition has been made regarding the role of ascitic fluid lactate as a better prognostic indicator of mortality in cirrhotic patients with SBP. Therefore, we aimed to evaluate the utility of ascitic fluid lactate in predicting mortality in cirrhotic patients with SBP. Methods This was a prospective, observational study that was conducted in the Hepato-Gastroenterology Department of Sindh Institute of Urology and Transplantation (SIUT), Karachi from 1 January 2022 to 31 December 2022. All the patients having liver cirrhosis with ascites, aged between 18 and 65 years, and presenting with fever and/or abdominal pain were recruited in the study in the first six months (i.e., from 1 January 2022 to 30 June 2022) and were followed for six more months for the outcome. However, those patients on dialysis or those with hepatocellular carcinoma, any other malignancy as per a history of solid organ transplant, a history of HIV infection, or those underlying systemic sepsis or infections other than SBP were excluded from the study. The presence or absence of SBP was confirmed by doing the ascitic fluid analysis. Ascitic fluid lactate levels were also requested in each patient. Mortality was assessed at one, two, three, and six months, respectively. All the data were analyzed using SPSS version 23.0. The area under the receiver operating curve (AUROC) was obtained for ascitic fluid lactate for predicting mortality in SBP. At an optimal cutoff, the diagnostic accuracy of ascitic fluid lactate was obtained. Results The total number of cirrhotic patients included in the study was 123. The majority of the patients belong to Child Turcotte Pugh (CTP) class C (n = 88; 71%). Two third of the patients (65.8%; n = 81) had viral hepatitis i.e., hepatitis B, D, and/or C, as the cause of cirrhosis. Overall mortality was observed in 51(41.5%) patients. Ascitic fluid lactate was significantly raised in patients with SBP than in patients with non-SBP (p = 0.004). The AUROC of ascitic fluid lactate was highest at three months (AUROC = 0.88) followed by six months (AUROC = 0.84), two months (AUROC = 0.804), and one month (AUROC=0.773). At an optimal cut-off of more than or equal to 22.4 mg/dl, ascitic fluid lactate had a sensitivity of 84.9%, specificity of 85.7%, positive predictive value (PPV) of 97.3%, negative predictive value of 42.8% with diagnostic accuracy of 85% in predicting overall mortality in patients with SBP. On sub-analysis, the diagnostic accuracy of ascitic fluid lactate was highest at six months followed by at three, two, and one month, respectively. Conclusion Ascitic fluid lactate showed a good diagnostic utility in predicting the overall mortality in patients with SBP with the best diagnostic accuracy in predicting long-term (six months) mortality. However, further studies are required to validate our results.

Etiologies Associated With Elevated Liver Enzymes After Renal Transplant.

OBJECTIVES: One of the most important causes of morbidity and mortality in renal transplant recipients is liver disease. Liver dysfunction is shown in 7% to 67% of kidney transplant recipients. Liver insufficiency accounts for death in up to 28% of kidney transplant recipients. We stratified various etiological factors responsible for elevated liver enzymes in kidney transplant recipients. MATERIALS AND METHODS: We enrolled all patients who fulfilled inclusion criteria. The principal investigator obtained and recorded demographic and clinical information via a standardized form. We reviewed clinical records of kidney recipients with hepatotoxicity during the course of illness, and we analyzed data with SPSS statistical software (version 22). Descriptive statistics were used for continuous and categorical variables. RESULTS: All recipients of living related renal transplants from January 2015 to December 2016 were included in the study (n = 496). We excluded 64 patients with positive serology for hepatitis B or hepatitis C before transplant. Of the remaining 432 patients, 74 (17.1%) had deranged liver enzymes. Forty-one patients (55.4%) had deranged liver enzymes 3 to 4 years after transplant, whereas 23 patients (31.1%) had deranged liver enzymes 4 years after transplant. Liver parenchymal biopsy was performed in 17 patients (23%) to evaluate the etiology. The most common cause of deranged liver enzymes was sepsis, which was seen in 21 patients (28.4%), followed by viral hepatitis, ie, cytomegalovirus hepatitis in 7 (9.5%) and hepatitis C in 6 (8.1%) patients. Other causes included antituberculosis treatment-induced liver injury, autoimmune hepatitis, sinusoidal obstruction syndrome, and nonalcoholic steatohepatitis, observed in 4 patients each (5.4%). CONCLUSION: The most common cause of deranged liver enzymes in patients who received living related renal transplants in our population was sepsis, which can have a substantial effect on graft survival.

Utility of the "BATS" Score in Predicting Choledocholithiasis in Patients With Gall Bladder Stones.

Background and aim The role of expensive, risky, and unnecessary endoscopic interventions can be avoided by the use of non-invasive tests to predict common bile duct (CBD) stones. Therefore, our aim was to identify non-invasive predictors of choledocholithiasis (CL) in patients and further to predict a model and assess its diagnostic accuracy in predicting CL. Methods This cross-sectional study was carried out from June 1, 2020, to December 31, 2021. Patients having gall bladder stones on percutaneous transabdominal sonography and fulfilling intermediate probability criteria of CL were enrolled. These patients then underwent radial endoscopic ultrasound (EUS) followed by endoscopic retrograde cholangiopancreatography (ERCP) for detecting CBD stones. Univariate logistic regression analysis, followed by multivariate logistic regression analysis, was performed to ascertain the independent predictors of CBD stone in patients with intermediate probability. A model was proposed, and the diagnostic accuracy was calculated at an optimal cutoff. The model was then internally validated in the patients with intermediate probability and was also compared with the pre-existing score. Results Out of 131 patients included in the study, CBD stone was noted in 85 (66%) and 88 (67.2%) patients on EUS and ERCP, respectively. On multivariate analysis, high serum bilirubin (>2 mg/dL) and alkaline phosphatase (200 IU) and dilated CBD (>6 mm) on transabdominal sonography at baseline were significant predictors of CBD stone in these patients. Using these variables, a scoring system (BATS score) was developed, which had an area under the receiver operating curve (AUROC) of 0.98 in predicting the presence of CBD stone with a sensitivity of 93.18%, a specificity of 76.74%, and a diagnostic accuracy of 87.79%. In the validation cohort, a BATS score of ≥5 had a diagnostic accuracy of 95.91% in predicting CL. Conclusion The BATS score showed excellent sensitivity and good diagnostic accuracy in predicting the CBD stone with excellent results on internal validation. However, external validation of our results is required to recommend this model on a larger scale.

Correlation of Model for End Stage Liver Disease (MELD), MELD-Sodium (MELD-Na), and Child-Turcotte-Pugh (CTP) Score With Frailty in Patients With Hepatitis C Virus (HCV) Related Cirrhosis.

INTRODUCTION: The model for end stage liver disease (MELD), model for end stage liver disease-sodium (MELD Na), and Child-Turcotte-Pugh (CTP) score are independent predictors of mortality in cirrhotic patients. Approximately 43% of cirrhotic patients with advanced disease are frail and can have detrimental effects on the disease prognosis and survival including delisting from the transplant list and increased risk of post-transplant complications. Therefore, our aim was to determine the correlation of MELD, MELD-Na, and CTP score with frailty in patients with hepatitis C virus (HCV) related cirrhosis. METHODS:  This cross-sectional study was conducted at the Department of Hepato-gastroenterology, Sindh Institute of Urology and Transplantation from 1st January 2022 to 30th June 2022. All the patients of either gender aged between 18 and 70 years with serological evidence of HCV and features of cirrhosis on ultrasound abdomen were included in the study. Patients with conditions over estimating frailty were excluded from the study. Liver Frailty Index (LFI) was calculated using grip strength measured in kilograms, timed chair stands, and balance testing. CTP and MELD-Na scores for each patient were also recorded. All the data were analyzed using SPSS version 22.0 (IBM Corp., Armonk, NY). The correlation of MELD, MELD-Na, and CTP with LFI was analyzed using the Pearson correlation coefficient and a p-value < 0.05 was considered statistically significant. RESULTS:  A total of 274 patients were included in the study. Out of them, 185 (67.5%) were males. The mean CTP score was 8.1 + 2.1, MELD score of 13.6 + 7.1, MELD-Na score of 15 + 6.6, and LFI of 4.1 + 0.83. LFI was found to be weakly correlated with MELD (r = 0.278) (p < 0.001), MELD-Na score (r = 0.41) (p < 0.001), and CTP score (r = 0.325) (p < 0.001). CONCLUSION:  Weak correlation was noted between LFI, CTP, MELD, and MELD-Na scores in HCV-associated chronic liver disease. Therefore, frailty along with MELD, MELD-Na, and CTP must be assessed before considering the patients for liver transplantation.

Pancreatic Tuberculosis mimicking as a Pancreatic Mass Lesion.

Tuberculosis is a global health problem and commonly affects the respiratory system. The involvement of the pancreas in this disease is a rare event. We hereby report a case of a young male who presented with right hypochondrial pain along with significant weight loss. Further workup revealed a raised erythrocyte sedimentation rate along with a pancreatic mass lesion on the CT scan. Endoscopic ultrasound-guided biopsy of the pancreatic lesion revealed evidence of caseation necrosis along with epithelioid granuloma, findings suggestive of tuberculosis. He was started on anti-tuberculous therapy for 6 months and a repeat CT scan showed complete disappearance of the mass lesion and resolution of symptoms. Key Words: Tuberculosis, Pancreatic mass, Endoscopic ultrasound, Biopsy.

Quantitative Micro-Elastography Enables In Vivo Detection of Residual Cancer in the Surgical Cavity during Breast-Conserving Surgery.

Breast-conserving surgery (BCS) is commonly used for the treatment of early-stage breast cancer. Following BCS, approximately 20% to 30% of patients require reexcision because postoperative histopathology identifies cancer in the surgical margins of the excised specimen. Quantitative micro-elastography (QME) is an imaging technique that maps microscale tissue stiffness and has demonstrated a high diagnostic accuracy (96%) in detecting cancer in specimens excised during surgery. However, current QME methods, in common with most proposed intraoperative solutions, cannot image cancer directly in the patient, making their translation to clinical use challenging. In this proof-of-concept study, we aimed to determine whether a handheld QME probe, designed to interrogate the surgical cavity, can detect residual cancer directly in the breast cavity in vivo during BCS. In a first-in-human study, 21 BCS patients were scanned in vivo with the QME probe by five surgeons. For validation, protocols were developed to coregister in vivo QME with postoperative histopathology of the resected tissue to assess the capability of QME to identify residual cancer. In four cavity aspects presenting cancer and 21 cavity aspects presenting benign tissue, QME detected elevated stiffness in all four cancer cases, in contrast to low stiffness observed in 19 of the 21 benign cases. The results indicate that in vivo QME can identify residual cancer by directly imaging the surgical cavity, potentially providing a reliable intraoperative solution that can enable more complete cancer excision during BCS. SIGNIFICANCE: Optical imaging of microscale tissue stiffness enables the detection of residual breast cancer directly in the surgical cavity during breast-conserving surgery, which could potentially contribute to more complete cancer excision.

A Tertiary Care Center's Experience with Clinicopathological Characteristics of Gallbladder Carcinoma in Our Population.

Introduction: Gallbladder cancer (GBC) is the most common malignant biliary tract tumor with the shortest survival from the time of diagnosis. This poor prognosis is due to the destructive biologic behavior of GBC, lack of sensitive screening tests for early detection, and vague nature of first presentation. Here in this study, we will evaluate the baseline characteristics of the patients presenting with gallbladder carcinoma in our population. Materials and methods: This retrospective study was conducted in the Department of Gastroenterology at Sindh Institute of Urology and Transplantation (SIUT), Karachi. Patient data were compiled and composed from the in-patient health records, radiology, and operational records. Those patients with suspicion of GBC, but negative at histology, or patients having inconclusive radiologic findings, were excluded. Baseline characteristics were recorded. Results were presented as means ± SD for quantitative data or as numbers with percentages for qualitative data. Continuous variables were analyzed using the Student's t-test, while categorical variables were analyzed using the Chi-square test. A p-value of <0.05 was considered statistically significant. Results: A total of 162 patients were included in our study. Among them, 101 (62.3%) were females. Hypertension was the most common comorbid illness noted in 29 (17.9%) patients while 91 (56.2%) patients had no concurrent comorbidities. Most common risk factor for carcinoma of gallbladder was gallstones seen in 106 (65.1%) patients. The most common presenting complaint was combination of obstructive jaundice, weight loss with right hypochondrial pain seen in 66 (40.7%) patients. On CT abdomen, direct liver infiltration without lymphovascular invasion was noted in 77 (47.5%) patients followed by liver infiltration along with lymphovascular invasion in 26 (16%) patients and distant metastasis in 24 (14.8%) patients. On gallbladder (GB) mass biopsy, 58 (35.8%) patients had well-differentiated, 46 (28.4%) had moderately differentiated, while 33 (20.4%) had poorly differentiated adenocarcinoma. Of 162 patients, 103 (63.6%) patients underwent endoscopic retrograde cholangiopancreatography (ERCP). The most common finding on ERCP was proximal common bile duct (CBD) stricture with intrahepatic biliary system dilatation which was noted in 95 (58.6%) patients. Percutaneous transhepatic cholangiography (PTC) was performed only in 9 (5.6%) patients. Seventeen (10.5%) patients were managed by simple cholecystectomy, 39 (24.1%) patients underwent extended cholecystectomy, 14 (8.6%) patients underwent chemotherapy, while 102 (56.8%) patients were given palliative management. When followed for 1 year, 101 (62.3%) patients died within 6 months. Conclusion: The baseline characteristics, biopsy findings, modes of treatment, and rates of 1 year mortality were studied in patients with gallbladder carcinoma in our population. Advanced age, high white blood cell counts, and serum bilirubin at presentation with low lymphocyte count and presence of comorbid illnesses were the factors independently associated with increased mortality in patients with gallbladder carcinoma. However, further studies with large sample size and stratification with respect to age, gender, and different variables can be done in terms of mortality in patients with gallbladder carcinoma. How to cite this article: Akbar N, Yaseen T, Muhammad A, et al. A Tertiary Care Center's Experience with Clinicopathological Characteristics of Gallbladder Carcinoma in Our Population. Euroasian J Hepato-Gastroenterol 2022;12(1):35-39.

Role of "HinCh Score" as a Non-invasive Predictor of Post-endoscopic Retrograde Cholangiopancreatography Cholangitis.

Introduction: Post-endoscopic retrograde cholangiopancreatography (ERCP) cholangitis (PEC) is associated with increased morbidity and mortality in patients ERCP. The aim of the present study was to analyze the predictors of PEC and to formulate a predictive model for early diagnosis and management. Materials and methods: It was a cross-sectional study that was carried out at the Sindh Institute of Urology and Transplantation from September 2019 to June 2021. All patients aged between 18 and 75 years and undergoing ERCP due to obstructive jaundice were included. Patients with altered biliary anatomy, history of hepatobiliary surgery, and concurrent sepsis were excluded. Endoscopic retrograde cholangiopancreatography intervention was performed by an expert gastroenterologist. Laboratory parameters (total leukocyte count, total bilirubin, alanine transaminase) and patient temperature were checked on admission, at 12 hours, 24 hours, and 36 hours after ERCP to document PEC. Results: A total of 349 patients were included in the study. Among them, 176 (50.4%) patients were males. Common bile duct (CBD) stricture was the most common indication of ERCP seen in 148 (42.4%) patients followed by CBD stone and cholangiocarcinoma in 108 (30.9%) and 48 (13.8%) patients, respectively. The most common presenting complaint was jaundice noted in 300 (86%) patients followed by right hypochondrial pain in 280 (80.2%) and weight loss in 194 (55.6%) patients, respectively. Post-ERCP cholangitis developed in 251 (71.9%) patients. On univariate analysis, age >50 years, female gender, right hypochondrial pain, fever, bilirubin >5 mg/dL on admission, CBD stricture on ERCP, TLC of >10,000 cells/L at 12 hours, 24 hours, and 36 hours post-ERCP and rise in ALT >50 IU 24 and 48 hours post-ERCP were significantly associated with PEC. While on multivariate analysis, female gender, bilirubin >5 mg/dL on admission, CBD stricture on ERCP, post-ERCP fever, and rise in TLC of >10000 cells/L at 24 hours post-ERCP were independently associated with PEC. HinCh score was formulated and was found to be significantly associated with the presence of cholangitis. Area under the receiver operating characteristics (AUROC) of HinCh score was 0.74 and at cutoff of ≥4, the sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of HinCh were 81.67%, 59.18%, 83.67%, and 55.71%, respectively with a diagnostic accuracy of 75.36%. Conclusion: The performance of HinCh score in predicting PEC was accurate in 86% of the patients. However, further studies are needed to validate the score. How to cite this article: Ismail H, Yaseen RT, Danish M, et al. Role of "HinCh Score" as a Non-invasive Predictor of Post-endoscopic Retrograde Cholangiopancreatography Cholangitis. Euroasian J Hepato-Gastroenterol 2022;12(1):19-23.

Multi-class classification of breast tissue using optical coherence tomography and attenuation imaging combined via deep learning.

We demonstrate a convolutional neural network (CNN) for multi-class breast tissue classification as adipose tissue, benign dense tissue, or malignant tissue, using multi-channel optical coherence tomography (OCT) and attenuation images, and a novel Matthews correlation coefficient (MCC)-based loss function that correlates more strongly with performance metrics than the commonly used cross-entropy loss. We hypothesized that using multi-channel images would increase tumor detection performance compared to using OCT alone. 5,804 images from 29 patients were used to fine-tune a pre-trained ResNet-18 network. Adding attenuation images to OCT images yields statistically significant improvements in several performance metrics, including benign dense tissue sensitivity (68.0% versus 59.6%), malignant tissue positive predictive value (PPV) (79.4% versus 75.5%), and total accuracy (85.4% versus 83.3%), indicating that the additional contrast from attenuation imaging is most beneficial for distinguishing between benign dense tissue and malignant tissue.

Clinical Characteristics and Comparison of Different Prognostic Scores in Wilson's Disease.

Aim: Wilson's disease (WD) is a rare autosomal recessive disease, that can involve any organ of the body, the main ones being the liver and the brain. These patients can have varied presentations, ranging from having no symptoms to having neurological manifestations to features of chronic liver disease (CLD). Those patients that end up having CLD are prognosticated via the Child-Turcotte-Pugh (CTP) score and the Model for End-stage Liver Disease (MELD) score. However, two specific scores exist for prognostication in patients having WD, namely, the Nazar score and the Dhawan score. However, these are yet to be validated nor has their use been implemented in clinical practice. Materials and methods: Our study involved 65 patients with WD, comprising both the pediatric and the adult population. We aimed at evaluating the clinical manifestations the lab parameters and the management of these patients. Furthermore, we tried validating the Nazar and the Dhawan score and later compared them with the CTP and the MELD score, which are well-known prognostic tools in CLD. Results: Our patients were subdivided into the pediatric (more than 50%) and the adult group. The most common presenting complaint noted in both groups was abdominal distension. Values of the urine copper and serum ceruloplasmin did not defer between the pediatric and adult patients. Hepatic involvement is frequently seen in the pediatric age-group. Also, CTP class C was chiefly seen in pediatrics 17/33 (51.5%), while CTP class B was in adults 13/32 (40.6%). The mean Nazar score was 3 ± 3, while the mean Dhawan score was 5 ± 4. The main treatment offered for both groups was zinc along with penicillamine. Conclusion: Our study showed the Dhawan score was comparable to the CTP and the MELD score in terms of predicting the disease severity of WD in our patient population. How to cite this article: Majid Z, Abrar G, Laeeq SM, et al. Clinical Characteristics and Comparison of Different Prognostic Scores in Wilson's Disease. Euroasian J Hepato-Gastroenterol 2022;12(2):69-72.

Intestinal Spirochaetosis-A case series from the developing world.

Spirochaetes comprise a heterogenous group of gram negative, motile, spiral shaped bacteria. Some of these pathogens are known to cause numerous human diseases such as Lyme disease, relapsing fever, syphilis and leptospirosis. However, intestinal spirochetosis is a rare condition. Patients frequently present with long-term complaints of loose stools, abdominal pain and weight loss and rectal bleeding. Hence to establish a diagnosis an endoscopy with biopsy is required. In this article, we describe four such cases, having different ages and socio- economic background, successfully treated with a short course of metronidazole.

Liver Elastography as a Predictor of Esophageal Varices in Patients With Cirrhosis.

Introduction Liver cirrhosis is an advanced consequence of a long-standing liver disease that can lead to portal hypertension which subsequently can manifest as life-threatening variceal bleeding. The present study aimed to determine liver stiffness by shear wave elastography (SWE) to predict esophageal varices (EV) in patients with chronic liver diseases. Methodology A prospective observational study was performed at the Department of Hepatogastroenterology, Sindh Institute of Urology and Transplantation, Karachi between November 2020 and July 2021. Individuals aged between 18 and 50 years, irrespective of gender, with diagnosed chronic liver disease >6 months were eligible to partake in the study. Patients with concomitant renal failure, severe ascites, severe life-threatening co-morbidities including congestive heart failure NYHA-III and IV, acute asthmatic attack, and recent myocardial infarction (MI) were excluded from the study. SWE was determined in all patients to measure liver stiffness. Esophagogastroduodenoscopy (EGD) was performed to visualize the esophageal varices. All findings were recorded. A 2 × 2 table was applied to determine the sensitivity, specificity, positive, and diagnostic accuracy for SWE by taking endoscopy as the definitive test. Results A total of 204 patients were included in the study. Mean age of 40.37 ± 15.20 years was observed. The mean liver size of patients was 12.38 ± 2.06 cm and the mean liver stiffness of patients was 19.97 ± 8.6. The sensitivity and specificity of liver elastography were 44.90% and 51.90%, respectively. Furthermore, the positive and negative predictive values were 53.00% and 99.39%, respectively. The diagnostic accuracy of the test was 51.86%. Conclusion Even though the diagnostic gold standard for the detection of varices is EGD, liver elastography provides a less invasive procedure to assess for varices in patients with cirrhotic liver disease. The present study concluded that liver elastography is a non-invasive and indirect valuable tool to predict the presence of esophageal varices with sensitivity and specificity of 44.90% and 51.90%, respectively.

Camera-based optical palpation.

Optical elastography is undergoing extensive development as an imaging tool to map mechanical contrast in tissue. Here, we present a new platform for optical elastography by generating sub-millimetre-scale mechanical contrast from a simple digital camera. This cost-effective, compact and easy-to-implement approach opens the possibility to greatly expand applications of optical elastography both within and beyond the field of medical imaging. Camera-based optical palpation (CBOP) utilises a digital camera to acquire photographs that quantify the light intensity transmitted through a silicone layer comprising a dense distribution of micro-pores (diameter, 30-100 µm). As the transmission of light through the micro-pores increases with compression, we deduce strain in the layer directly from intensity in the digital photograph. By pre-characterising the relationship between stress and strain of the layer, the measured strain map can be converted to an optical palpogram, a map of stress that visualises mechanical contrast in the sample. We demonstrate a spatial resolution as high as 290 µm in CBOP, comparable to that achieved using an optical coherence tomography-based implementation of optical palpation. In this paper, we describe the fabrication of the micro-porous layer and present experimental results from structured phantoms containing stiff inclusions as small as 0.5 × 0.5 × 1 mm. In each case, we demonstrate high contrast between the inclusion and the base material and validate both the contrast and spatial resolution achieved using finite element modelling. By performing CBOP on freshly excised human breast tissue, we demonstrate the capability to delineate tumour from surrounding benign tissue.

Attributes, Performance, and Gaps in Current & Emerging Breast Cancer Screening Technologies.

BACKGROUND: Early detection of breast cancer, combined with effective treatment, can reduce mortality. Millions of women are diagnosed with breast cancer and many die every year globally. Numerous early detection screening tests have been employed. A wide range of current breast cancer screening methods are reviewed based on a series of searchers focused on clinical testing and performance. DISCUSSION: The key factors evaluated centre around the trade-offs between accuracy (sensitivity and specificity), operator dependence of results, invasiveness, comfort, time required, and cost. All of these factors affect the quality of the screen, access/eligibility, and/or compliance to screening programs by eligible women. This survey article provides an overview of the working principles, benefits, limitations, performance, and cost of current breast cancer detection techniques. It is based on an extensive literature review focusing on published works reporting the main performance, cost, and comfort/compliance metrics considered. CONCLUSION: Due to limitations and drawbacks of existing breast cancer screening methods there is a need for better screening methods. Emerging, non-invasive methods offer promise to mitigate the issues particularly around comfort/pain and radiation dose, which would improve compliance and enable all ages to be screened regularly. However, these methods must still undergo significant validation testing to prove they can provide realistic screening alternatives to the current accepted standards.

Finite element modelling and validation for breast cancer detection using digital image elasto-tomography.

Finite element (FE) models are increasingly used to validate experimental data in breast cancer. This research constructed a biomechanical FE model for breast shaped phantoms used to develop and validate a mechanical vibration based screening system. Such models do not currently exist but would enhance development of this screening technology. Three phantoms were modelled: healthy, with 10 and 20 mm inclusions. The overall goal was to create models with enough accuracy to replace experimental phantoms in providing data to optimize diagnostic algorithms for digital image-based elasto-tomography (DIET) screening technologies. FE model results were validating against experimental DIET phantom data for over 4000 collected points on each model and phantom using cross-correlation coefficients between experimental simulated data and direct comparison. Results showed good to strong correlation ranging from 0.7 to 1.0 in all cases with over 90% having a value over 0.9. Magnitudes for each frame of the dynamic response also matched well, indicating that the material properties and geometry were accurate enough to provide this level of correlation. These results justify the use of FE model generated data for in silico diagnostic algorithm development testing. The overall modelling and validation approach is not overly complex, and thus generalizable to similar problems using mechanical properties of silicone phantoms, and might be extensible to human cases with further work. Graphical abstract Validate that dynamic displacements show that the model can be used in place of phantoms for rapid development of diagnostic algorithms that use surface motion to detect underlying mechanical properties.

3-(2-Ethyl-2-phenyl-hydrazin-1-yl-idene)indolin-2-one.

In the title compound, C16H15N3O, the dihedral angle between the indole ring system (r.m.s. deviation = 0.020 Å) and the phenyl ring is 14.49 (9)°. The mol-ecular conformation is supported by an intra-molecular C-H⋯O inter-action, which closes an S(7) ring. In the crystal, inversion dimers linked by pairs of N-H⋯O hydrogen bonds generate R2(2)(8) loops.