David Chromy

Dr. David Chromy

orcid

Research Focus & Metrics

Academic Career Length

11Years (2016-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 October 2016 in Journal of Hepatology
Verified
Journal Article
Closed access
MMMattias Mandorfer
Mattias Mandorfer
KKKarin Kozbial
Karin Kozbial
PSPhilipp Schwabl
Philipp Schwabl
CFClarissa Freissmuth
Clarissa Freissmuth
RSRémy Schwarzer
Rémy Schwarzer
MPMarkus Peck-Radosavljevic
Markus Peck-Radosavljevic

1 April 2022 in Journal of Hepatology
Verified
Journal Article
Open access
GSGeorg Semmler
Georg Semmler
EMElias Laurin Meyer
Elias Laurin Meyer
KKKarin Kozbial
Karin Kozbial
PSPhilipp Schwabl
Philipp Schwabl
SHStefanie Hametner-Schreil
Stefanie Hametner-Schreil
MMMattias Mandorfer
Mattias Mandorfer
Hepatocellular carcinoma (HCC) is a major cause of morbidity and mortality in patients with advanced chronic liver disease (ACLD) caused by chronic hepatitis C who have achieved sustained virologic response (SVR). We developed risk stratification algorithms for de novo HCC development after SVR and validated them in an independent cohort. We evaluated the occurrence of de novo HCC in a derivation cohort of 527 patients with pre-treatment ACLD and SVR to interferon-free therapy, in whom alpha-fetoprotein (AFP) and non-invasive surrogates of portal hypertension including liver stiffness measurement (LSM) were assessed pre-/post-treatment. We validated our results in 1,500 patients with compensated ACLD (cACLD) from other European centers. During a median follow-up (FU) of 41 months, 22/475 patients with cACLD (4.6%, 1.45/100 patient-years) vs. 12/52 decompensated patients (23.1%, 7.00/100 patient-years, p <0.001) developed de novo HCC. Since decompensated patients were at substantial HCC risk, we focused on cACLD for all further analyses. In cACLD, post-treatment-values showed a higher discriminative ability for patients with/without de novo HCC development during FU than pre-treatment values or absolute/relative changes. Models based on post-treatment AFP, alcohol consumption (optional), age, LSM, and albumin, accurately predicted de novo HCC development (bootstrapped Harrel's C with/without considering alcohol: 0.893/0.836). Importantly, these parameters also provided independent prognostic information in competing risk analysis and accurately stratified patients into low- (~2/3 of patients) and high-risk (~1/3 of patients) groups in the derivation (algorithm with alcohol consumption; 4-year HCC-risk: 0% vs. 16.5%) and validation (3.3% vs. 17.5%) cohorts. An alternative approach based on alcohol consumption (optional), age, LSM, and albumin (i.e., without AFP) also showed a robust performance. Simple algorithms based on post-treatment age/albumin/LSM, and optionally, AFP and alcohol consumption, accurately stratified patients with cACLD based on their risk of de novo HCC after SVR. Approximately two-thirds were identified as having an HCC risk <1%/year in both the derivation and validation cohort, thereby clearly falling below the cost-effectiveness threshold for HCC surveillance. Simple algorithms based on age, alcohol consumption, results of blood tests (albumin and α-fetoprotein), as well as liver stiffness measurement after the end of hepatitis C treatment identify a large proportion (approximately two-thirds) of patients with advanced but still asymptomatic liver disease who are at very low risk (<1%/year) of liver cancer development, and thus, might not need to undergo 6-monthly liver ultrasound.

7 November 2016 in Alimentary Pharmacology & Therapeutics
Verified
Journal Article
Closed access
PDF file
PSPhilipp Schwabl
Philipp Schwabl
MMM. Mandorfer
M. Mandorfer
SSS. Steiner
S. Steiner
BSB. Scheiner
B. Scheiner
DCDavid Chromy
David Chromy
TRThomas Reiberger
Thomas Reiberger

13 July 2020 in Hepatology
Verified
Journal Article
Open access
PDF file
GSGeorg Semmler
Georg Semmler
TBTeresa Binter
Teresa Binter
KKKarin Kozbial
Karin Kozbial
PSPhilipp Schwabl
Philipp Schwabl
SHStefanie Hametner‐Schreil
Stefanie Hametner‐Schreil
MMMattias Mandorfer
Mattias Mandorfer
Background and Aims: Risk stratification after cure from hepatitis C virus (HCV) infection remains a clinical challenge. We investigated the predictive value of noninvasive surrogates of portal hypertension (liver stiffness measurement [LSM] by vibration‐controlled transient elastography and von Willebrand factor/platelet count ratio [VITRO]) for development of hepatic decompensation and hepatocellular carcinoma in patients with pretreatment advanced chronic liver disease (ACLD) who achieved HCV cure. Approach and Results: A total of 276 patients with pretreatment ACLD and information on pretreatment and posttreatment follow‐up (FU)‐LSM and FU‐VITRO were followed for a median of 36.6 months after the end of interferon‐free therapy. FU‐LSM (area under the receiver operating characteristic curve [AUROC]: 0.875 [95% confidence interval [CI]: 0.796‐0.954]) and FU‐VITRO (AUROC: 0.925 [95% CI: 0.874‐0.977]) showed an excellent predictive performance for hepatic decompensation. Both parameters provided incremental information and were significantly associated with hepatic decompensation in adjusted models. A previously proposed combined approach (FU‐LSM < 12.4 kPa and/or FU‐VITRO < 0.95) to rule out clinically significant portal hypertension (CSPH, hepatic venous pressure gradient ≥10 mm Hg) at FU assigned most (57.3%) of the patients to the low‐risk group; none of these patients developed hepatic decompensation. In contrast, in patients in whom FU‐CSPH was ruled in (FU‐LSM > 25.3 kPa and/or FU‐VITRO > 3.3; 25.0% of patients), the risk of hepatic decompensation at 3 years following treatment was high (17.4%). Patients within the diagnostic gray‐zone for FU‐CSPH (17.8% of patients) had a very low risk of hepatic decompensation during FU (2.6%). The prognostic value of this algorithm was validated in an internal (n = 86) and external (n = 162) cohort. Conclusion: FU‐LSM/FU‐VITRO are strongly and independently predictive of posttreatment hepatic decompensation in HCV‐induced ACLD. An algorithm combining these noninvasive markers not only rules in or rules out FU‐CSPH, but also identifies populations at negligible versus high risk for hepatic decompensation. FU‐LSM/FU‐VITRO are readily accessible and enable risk stratification after sustained virological response, and thus facilitate personalized management.

24 April 2016 in AIDS
Verified
Journal Article
Closed access
MMMattias Mandorfer
Mattias Mandorfer
PSPhilipp Schwabl
Philipp Schwabl
SSSebastian Steiner
Sebastian Steiner
BSBernhard Scheiner
Bernhard Scheiner
DCDavid Chromy
David Chromy
MPMarkus Peck-Radosavljevic
Markus Peck-Radosavljevic
We aimed to investigate the safety and efficacy of interferon (IFN) and ribavirin (RBV)-free therapy with sofosbuvir along with daclatasvir (SOF/DCV) in HIV/hepatitis C virus (HCV)-coinfected patients (HIV/HCV), who have an urgent need for effective antiviral therapy. We also assessed its impact on liver stiffness and liver enzymes. Thirty-one patients thoroughly documented HIV/HCV with advanced liver disease (advanced liver fibrosis and/or portal hypertension) who were treated with SOF/DCV were retrospectively studied. The following treatment durations were applied: HCV-genotype (HCV-GT)1/4 without cirrhosis: 12 weeks; HCV-GT1/4 with cirrhosis: 24 weeks; HCV-GT3: 24 weeks; if HCV-RNA was detectable 4 weeks before the end of treatment, treatment was extended by 4 weeks at a time. Fifty-two percent of patients were treatment-experienced. The majority of patients had HCV-GT1 (68%), whereas HCV-GT3 and HCV-GT4 were observed in 23 and 10% of patients, respectively. Ninety-four percent had liver stiffness greater than 9.5 kPa or METAVIR fibrosis stage higher than F2 and 45% had liver stiffness above 12.5 kPa or METAVIR F4. Portal hypertension (HVPG ≥6 mmHg) and clinically significant portal hypertension (HVPG ≥10 mmHg) were observed in 67% (18/27) and 26% (7/27) of patients, respectively. Sustained virologic response 12 weeks after the end of treatment (SVR12) was achieved in 100% (31/31). Treatment with SOF/DCV was generally well tolerated and there were no treatment discontinuations. HCV eradication improved liver stiffness from 11.8 [interquartile range (IQR): 11.5 kPa] to 6.9 (IQR: 8.2) kPa [median change: -3.6 (IQR:5.2) kPa; P < 0.001] and decreased liver enzymes. The mean time period between treatment initiation and follow-up liver stiffness measurement was 32.7 ± 1.2 weeks. IFN- and RBV-free treatment with SOF/DCV was well tolerated and achieved SVR12 in all HIV/HCV with advanced liver disease. It also significantly improved liver stiffness, suggesting anti-fibrotic and anti-portal hypertensive effects.

1 May 2019 in United European Gastroenterology Journal
Verified
Journal Article
Open access
PDF file
DCDavid Chromy
David Chromy
MMMattias Mandorfer
Mattias Mandorfer
TBTheresa Bucsics
Theresa Bucsics
PSPhilipp Schwabl
Philipp Schwabl
BSBernhard Scheiner
Bernhard Scheiner
TRThomas Reiberger
Thomas Reiberger
Background: The treatment of acute hepatitis C (AHC) with direct‐acting antiviral agents (DAAs) is considered a cornerstone of hepatitis C virus (HCV) elimination strategies, especially in human immunodeficiency virus (HIV)‐infected individuals at high risk of onward transmission.Objective: Optimal treatment regimens and duration for AHC in HIV‐coinfected patients remain to be established. Thus, we aimed to evaluate the efficacy and safety of DAA treatment regimens in the setting of AHC.Methods: All HIV‐positive patients with a diagnosis of AHC according to the European AIDS Treatment Network (NEAT) consensus attending our clinic after 2014 were included. DAA treatment regimens and duration were based on current recommendations for chronic hepatitis C (CHC) at treatment initiation.Results: Thirty‐eight HIV/AHC patients (median age 42.0 years), mostly men who have sex with men (92%), were started on interferon‐free regimens. HCV‐genotype (GT) was predominately GT‐1a (65%). The following DAA regimens were prescribed: ombitasvir/paritaprevir/ritonavir/dasabuvir (42%; 16/38), glecaprevir/pibrentasvir (29%; 11/38), sofosbuvir/ledipasvir (13%; 5/38), ombitasvir/paritaprevir/ritonavir (5%; 2/38), grazoprevir/elbasvir (5%; 2/38) and sofosbuvir/velpatasvir (5%; 2/38). All HIV/AHC patients achieved sustained virologic response 12 weeks after end of treatment (SVR12) (100%; 38/38). DAA‐related adverse events were rare.Conclusion: Interferon‐free DAA regimens (including 34% pan‐genotypic regimens) yielded 100% SVR12 in HIV/AHC individuals if treatment durations similar to CHC are applied.