Early recognition of acute kidney injury (AKI) is critical to prevent its associated complications as well as its progression to long term adverse outcomes like chronic kidney disease. A growing body of evidence from both laboratory and clinical studies suggests that inflammation is a key factor contributing to the progression of AKI regardless of the initiating event. Biomarkers of inflammation are therefore of interest in the evaluation of AKI pathogenesis and prognosis. There is evidence that the renin angiotensin aldosterone system is activated in AKI, which leads to an increase in angiotensin II (Ang II) formation within the kidney. Ang II activates pro-inflammatory and pro-fibrotic pathways that likely contribute to the progression of AKI. Angiotensinogen is the parent polypeptide from which angiotensin peptides are formed and its stability in urine makes it a more convenient marker of renin angiotensin system activity than direct measurement of Ang II in urine specimens, which would provide more direct information. The potential utility of urinary angiotensinogen as a biomarker of AKI is discussed in light of emerging data showing a strong predictive value of AKI progression, particularly in the setting of decompensated heart failure. The prognostic significance of urinary angiotensinogen as an AKI biomarker strongly suggests a role for renin–angiotensin system activation in modulating the severity of AKI and its outcomes.

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28 Background: Amongst all cancers in men, prostate cancer (PCa) is the most common cancer, and the second leading cause of death. Racial disparities in PCa care in the United States (US) are known to exist. However, it is not clear if this disparity is also noted specifically in patients diagnosed with metastatic PCa (metaPCa). We analyzed the Surveillance Epidemiology and End results Program (SEER) 18 registry, to determine the racial disparity in survival of AA patients diagnosed with metaPCa compared to other races recorded in this registry. Methods: Cancer incidence data was obtained from the SEER 18 registry (2000-2018). The data was analyzed using StataMP 16 (StataCorp) software. Demographic and clinical outcomes were recorded from the registry. We performed univariate Cox regression using proportional hazard model and obtained Kaplan Meier curves to look at the difference in survival based on different age groups and race. Results: A total of 51,979 cases were identified with metaPCa, out of whom 75.8% were Whites. 40,579 deaths were recorded. Mean age group of patients with metaPCa were 70-74 years. Grade 3 poorly differentiated adenocarcinoma was noted in 54.6% patients. There was no statistically significant difference in survival of AA patients with metaPCa compared to Non-Hispanic Whites (NHW) (Hazard Ratio (HR): 0.99; 95%CI 0.96,1.03 p = 0.71) or Alaskan and American Natives (AIAN) with metaPCa (HR:1.048; 95%CI 0.91,1.21 p = 0.539). AA with metaPCa had a statistically better outcome compared to Asian and Pacific Islanders with metaPCa (HR:0.775; 95%CI 0.731,0.821 p = 0.00). Amongst patients with less than 65 years of age with metaPCa, AA patients had statistically better survival than NHW (HR: 0.94; 95% CI 0.89-0.98 p = 0.05). No statistically supported racial disparity in survival was observed in patients above 65 years with metaPCa (AA to NHW patients- HR: 0.99; 95% CI 0.96,1.03 p = 0.71). Conclusions: Although racial disparities exist in survival of all patients diagnosed with prostate cancer, when it comes to those with metaPCA, there is no statistically supported racial disparity amongst AA patients compared to NHW, except for those who are younger than 65 years where white patients have a worse outcome compared to AA diagnosed with metaPCa.

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e19093 Background: Occurrence of venous thromboembolism is well known to have increased mortality in cancer patients with pulmonary embolism known to be the leading contributor. However, risk of mortality and healthcare burden with deep venous thrombosis (DVT) alone is not well elucidated, and primary prophylaxis is still controversial. We sought to evaluate risk of hospitalization, mortality, as well as, differences in resource utilization in patients with and without cancer, who were diagnosed in the emergency department (ED) with acute DVT alone. Methods: Adult patients diagnosed with acute DVT from January 2016 to December 2017 were identified from the Nationwide Emergency Department Samples (NEDS) database. Univariate and Multivariate logistic regression analysis was used to compare the risk of admission from the ED and inpatient mortality in DVT patients with cancer and those without. Secondary outcomes assessed were length of hospital stay (LOS), inpatient hospital charges, risk of GI bleed, and rates of inferior vena cava (IVC) filter placement and thrombolysis. Results: A total of 404,121 patients were diagnosed with acute DVT only, of which 8% had an underlying malignancy. Most common primary cancers were GI tract (20.1%), hematologic (16.5%) and lung (13.5%). Patients with cancer were older (mean age 66.4 vs 59.8 years, p<0.0001), with a slight male preponderance (51.8% vs 47.5%, p<0.0001). They were also more likely to be admitted from the ED (70.5% vs 39.1%, p<0.0001). Patients with malignancy had longer length of stay, higher hospital charges, higher mortality and rates of GI bleed (p<0.001 for all outcomes). On multivariable analysis, after adjusting for age, sex and comorbidities, patients with cancer were more likely to be admitted than those without cancer (OR 3.71, CI 3.41-4.04, p<0.001), had higher mortality (OR 3.09, CI 2.42-3.94, p<0.001) and rates of GI bleed (1.75, CI 1.45-2.12, p<0.001). Likely for this reason, patients with cancer were more likely to undergo IVC filter placement (15.2% vs 9.4%, p<0.0001) and less likely to receive thrombolysis (4.5% vs 7.4%, p<0.0001). Conclusions: Cancer patients with DVT presenting to ED had higher hospitalization rates with increased risk of mortality, GI bleed, IVC filter placement and decreased rates of thrombolysis than those without malignancy that was compounded by longer in-hospital LOS and healthcare costs. Further studies are needed to evaluate the need of prevention strategies for DVT that can help mitigate these factors in cancer patients.

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e16594 Background: The association between liver fibrosis and hepatocellular cancer (HCC) is well established, however there is limitation of data on liver fibrosis and non-HCC cancers. The aim of this study was to explore the link between the degree of liver fibrosis and other cancers. Methods: We searched the electronic medical records of Stroger Hospital who underwent liver elastography from January 1st, 2014 to December 31st, 2018 and had cancer. We extracted variables: demographics, cancer histology and metastatic status and then stratified patient into categories based the fibrosis stage. Results: Our analysis identified 103 patients with non-advanced fibrosis (F0-F2) and 74 with advanced fibrosis (F3-F4). HCC was seen in 33.3% of the patients with advanced fibrosis while genitourinary (GU) was the second most common cancer. Adenocarcinoma comprised 21% of these cancers and around 46% were metastatic. Of the 104 patients with non-advanced fibrosis, HCC was seen in 3.77% while gastrointestinal (GI) and GU cancers were seen in 24.27% and 12.62% respectively. Adenocarcinoma was most common (40%) in this group as well (Table). Conclusions: Our study not only reiterates the fact that the degree of liver fibrosis is proportional to the presence of HCC, but it also reports the association of liver fibrosis with several non-HCC cancers. The meaning of these associations is unclear, but it provides an area of further research to explore if causality exists. [Table: see text]

e19257 Background: Hepatic failure (HeF) accounts for 6% of all liver-related mortality and 7% liver transplants (LT) in the US. Epidemiologically, while viral hepatitis, acetaminophen and drug injuries are common; malignancy-related HeF remains relatively unexplored. Methods: We performed a retrospective study using nationwide inpatient database (NIS) 2016, which is the largest US inpatient database. HeF admissions were identified as primary diagnosis (through ICD-10 codes) and stratified into two major groups with and without cancer. The cancer group was subdivided into solid (excluding hepato-cellular cancer (HCC)) and non-solid malignancies. Primary outcome was inpatient mortality while secondary outcomes included Length of stay (LOS), Total charge (TCHG), LT and respiratory failure requiring ventilation (MV). Results: 71,000 inpatients met inclusion criteria for HeF, of which 7,715(10.87%) had an underlying malignancy. 39.4%( n = 3,045) had solid malignancies (excluding HCC), 8.4%( n = 650) had non-solid malignancies and 56%( n = 4,020) had HCC. Mean LOS was 5.4 days (95% CI 5.4-5.6, p = 0.23) and mean TCHG was 63,240$(95% CI 57,258$-69,222$, p = 0.03). African Americans (61.2 % vs 53.6%, p = 0.001) and males (12.05% vs 8.71%, p = 0.001) were preponderant in the cancer group. Inpatient mortality was higher in the cancer group (15.3% vs 5.5% p = 0.000), among which solid cancer (20.39%) predominated over non-solids (13.85%) and HCC (11.71%). LT was higher in cancer group (3.7 % vs 2%), whereas no difference in MV was found. Multivariable analysis results are summarized in the table below. Conclusions: HeF patients with underlying malignancy have higher mortality, LOS, TCHG and LT rates. Furthermore, high median income, large center admissions, HCC and Charlson index < = 3 among others were associated with higher odds of undergoing LT in HeF. This study sheds light on the epidemiology and impact of HeF in cancers, as well as disparities in LT among GI cancer patients with HeF. [Table: see text]