Stephen Fung

Dr. Stephen Fung

orcid

Research Focus & Metrics

Academic Career Length

7Years (2020-Present)

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

Representative Publications

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30 November 2020 in Cancers
Verified
Journal Article
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MEMartin Eichler
Martin Eichler
LHLeopold Hentschel
Leopold Hentschel
SRStephan Richter
Stephan Richter
Peter HohenbergerPeter Hohenberger
Peter Hohenberger
Bernd KasperBernd Kasper
Bernd Kasper
TGthe PROSa Study Group
the PROSa Study Group
Sarcomas are rare cancers with high heterogeneity in terms of type, location, and treatment. The health-related quality of life (HRQoL) of sarcoma patients has rarely been investigated and is the subject of this analysis. Adult sarcoma patients and survivors were assessed between September 2017 and February 2019 in 39 study centers in Germany using standardized, validated questionnaires (European Organization for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC QLQ-C30)). Associated factors were analyzed exploratively using multivariable linear regressions. Among 1113 patients, clinically important limitations and symptoms were most pronounced in emotional (63%, 95% CI 60–66%), physical (60%, 95% CI 57–62%), role functioning (51%, 95% CI 48–54%), and pain (56%, 95% CI 53–59%) and fatigue (51%, 95% CI 48–54%). HRQoL differed between tumor locations with lower extremities performing the worst and sarcoma types with bone sarcoma types being most affected. Additionally, female gender, higher age, lower socioeconomic status, recurrent disease, not being in retirement, comorbidities, and being in treatment were associated with lower HRQoL. Sarcoma patients are severely restricted in their HRQoL, especially in functioning scales. The heterogeneity of sarcomas with regard to type and location is reflected in HRQoL outcomes. During treatment and follow-up, close attention has to be paid to the reintegration of the patients into daily life as well as to their physical abilities and emotional distress.

11 February 2022 in Langenbeck's Archives of Surgery
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Journal Article
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SFStephen Fung
Stephen Fung
HAHany Ashmawy
Hany Ashmawy
CKChristian Krieglstein
Christian Krieglstein
THThomas Halama
Thomas Halama
DSDustin Schilawa
Dustin Schilawa
WKWolfram Trudo Knoefel
Wolfram Trudo Knoefel
Purpose: One of the major challenges in the management of patients with septic and non-septic open abdomen (OA) is to control abdominal wall retraction. The aim of this study was to evaluate the impact of a novel vertical traction device (VTD) on primary fascial closure (PFC) and prevention of fascial retraction.Methods: Twenty patients treated with OA were included in this retrospective multicenter study. All patients were initially stabilized with laparostomy and the abdomen temporarily sealed either with a Bogotá bag or a negative pressure wound therapy system (NPWT).Results: The mean duration of OA and fascia-to-fascia distance (FTF) prior to the VTD application were 3 days and 15 cm, respectively. At relook laparotomy 48 h after VTD implementation, the mean FTF distance significantly decreased to 10 cm (p = 0.0081). In all cases, PFC was achieved after a mean period of 7 days. Twelve patients received the VTD in combination with a NPWT, whereas in eight patients, the device was combined with an alternative temporary abdominal closure system (TAC). Although not statistically significant, the FTF distance remarkably decreased in both groups at relook laparotomy 48 h following the device implementation. The mean periods of PFC for patients with septic and non-septic OA were comparable (7.5 vs. 7 days). During follow-up, two patients developed an incisional hernia.Conclusion: Vertical traction device prevents fascial retraction and facilitates early PFC in OA. In combination with NPWT, rapid fascial closure of large abdominal defects can be achieved.

AAAndrea Alexander
Andrea Alexander
SFStephen Fung
Stephen Fung
MEMartin Eichler
Martin Eichler
NLNadja Lehwald-Tywuschik
Nadja Lehwald-Tywuschik
VUVasuki Uthayakumar
Vasuki Uthayakumar
WKWolfram Trudo Knoefel
Wolfram Trudo Knoefel
Background: Coronavirus disease 19 (COVID-19) substantially affects cancer patients due to adverse outcomes and disruptions in cancer care. Recent studies have indicated the additional stress and anxiety burden arising from the pandemic and impairing quality of life in this vulnerable group of patients. However, patients with cancer represent a heterogenous group. Therefore, we conducted a study on patients with pancreatic cancer, requiring demanding surgical interventions and chemotherapy regimens due to its aggressive tumor biology, to explore the pandemic’s impact on quality of life within this homogenous cohort. Methods: In a descriptive observational study, the quality of life of patients who had undergone pancreatic surgery for tumor resection at our institution between 2014 and the beginning of the pandemic in March 2020 was assessed. For HRQoL measurement, we used the European Organisation for Research and Treatment of Cancer Quality of Life Core Questionnaire (EORTC QLQ-C30), comparing their situation before the pandemic and since its beginning. An additional self-developed questionnaire was applied to assess the life circumstances during the pandemic. Results: Our cohort included 26 patients. Scores from the survey in HRQoL revealed no significant changes over time between before and during the pandemic. A medium deterioration in HRQoL was apparent in social functioning, as well as a small deterioration in role functioning and emotional functioning. Worries concerning a potential impact of COVID-19 on personal health were expressed. Psychological limitations in QoL were mainly attributed to the pandemic, whereas physical limitations in QoL were rather associated with the underlying disease of pancreatic cancer. Conclusion: The COVID-19 pandemic is causing considerable social and emotional distress among pancreatic cancer patients. These patients will benefit from psychological support during the pandemic and beyond. Long-time survivors of pancreatic cancer, such as those included in our cohort, appear to have improved resilience facing the psychosocial challenges of the pandemic. For pancreatic cancer, surgical care is considered the cornerstone of treatment. Prolonged delays in healthcare cause serious damage to mental and physical health. To date, the longer-term clinical consequences are not known and can only be estimated. The potential tragic outcome for the vulnerable group of pancreatic cancer patients highlights the urgency of timely healthcare decisions to be addressed in the future.

22 February 2022 in Healthcare
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Journal Article
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SFStephen Fung
Stephen Fung
HAHany Ashmawy
Hany Ashmawy
SSSami-Alexander Safi
Sami-Alexander Safi
MSMatthias Schauer
Matthias Schauer
Andreas KriegAndreas Krieg
Andreas Krieg
WKWolfram Trudo Knoefel
Wolfram Trudo Knoefel
Background: Video-assisted thoracoscopic surgery (VATS) with bullectomy and partial pleurectomy (VBPP) is an increasingly used and well-established surgical treatment for primary spontaneous pneumothorax (PSP). However, reports on its effectiveness and long-term outcomes are limited. The aim of this study was to assess and compare long-term recurrence rates following VBPP and chest tube (CT) treatment and to identify potential risk factors for disease recurrence in patients with PSP. Methods: A total of 116 patients treated either by VBPP or CT were included in this study. Long-term recurrence rates and associations between clinical parameters and recurrence of pneumothorax were analyzed. Results: Sixty-two patients (53.4%) underwent VBPP, whereas 54 (46.6%) patients underwent CT treatment only. During a median follow-up period of 76.5 months, VBPP patients experienced a significantly lower recurrence rate compared to CT patients (6/62 vs. 35/54; p < 0.0001). CT treatment (VBPP vs. CT; p < 0.001) and a large initial pneumothorax size (Collins < 4 vs. Collins ≥ 4; p = 0.018) were independent risk factors for pneumothorax recurrence. Conclusion: VBPP is an effective and safe surgical treatment for PSP. Therefore, patients with a large pneumothorax size might benefit from VBPP, as they are at high risk for disease recurrence.

14 August 2021 in Cancers
Verified
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SFStephen Fung
Stephen Fung
WKWolfram Trudo Knoefel
Wolfram Trudo Knoefel
Andreas KriegAndreas Krieg
Andreas Krieg
Lung cancer is the most common cause of cancer-related death worldwide. Approximately 85% is non-small-cell and 15% is small-cell lung cancer. The inhibitor of apoptosis proteins (IAPs) represent a heterogeneous family of anti-apoptotic proteins, some members of which have been reported to correlate with clinical outcome in lung cancer. We screened PubMed, Web of Science, and Scopus for studies that investigated the prognostic value and clinicopathological features of IAPs in lung cancer. Forty-five eligible studies with 4428 patients assessed the expression of the IAPs survivin, XIAP, livin, and BRUCE. The pooled hazard ratio (HR) of 33 studies that analyzed overall survival (OS) revealed a positive correlation between survivin expression and poor prognosis. Seven studies displayed a strong association between survivin and disease recurrence. Two studies that assessed the expression of XIAP and livin, respectively, proved a significant relationship of these IAPs with poor OS. Meta-analyses of clinicopathological variables revealed a significant association between survivin and T stage, UICC stage, the presence of lymph node metastasis, and grade of differentiation. In conclusion, high expression of distinct IAPs significantly correlates with prognosis in lung cancer. Therefore, lung cancer patients might benefit from a targeted therapy against specific IAPs.

28 August 2021 in Cancers
Verified
Journal Article
Open access
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SSSami-Alexander Safi
Sami-Alexander Safi
LHLena Häberle
Lena Häberle
SHSophie Heuveldop
Sophie Heuveldop
PKPatric Kroepil
Patric Kroepil
SFStephen Fung
Stephen Fung
GFGeorg Flügen
Georg Flügen
Summary: The rates of microscopic incomplete resections (R1/R0CRM+) in patients receiving standard pancreaticoduodenectomy for PDAC remain very high. One reason may be the reported high rates of mesopancreatic fat infiltration. In this large cohort study, we used available histopathological specimens of the retropancreatic fat and correlated high resolution CT-scans with the microscopic tumor infiltration of this area. We found that preoperative MDCT scans are suitable to detect cancerous infiltration of this mesopancreatic tissue and this, in turn, was a significant indicator for both incomplete surgical resection (R1/R0CRM+) and worse overall survival. These findings indicate that a neoadjuvant treatment in PDAC patients with CT-morphologically positive infiltration of the mesopancreas may result in better local control and thus improved resection rates. Mesopancreatic fat stranding should thus be considered in the decision for neoadjuvant therapy. Background: Due to the persistently high rates of R1 resections, neoadjuvant treatment and mesopancreatic excision (MPE) for ductal adenocarcinoma of the pancreatic head (hPDAC) have recently become a topic of interest. While radiographic cut-off for borderline resectability has been described, the necessary extent of surgery has not been established. It has not yet been elucidated whether pre-operative multi-detector computed tomography (MDCT) staging reliably predicts local mesopancreatic (MP) fat infiltration and tumor extension. Methods: Two hundred and forty two hPDAC patients that underwent MPE were analyzed. Radiographic re-evaluation was performed on (1) mesopancreatic fat stranding (MPS) and stranding to peripancreatic vessels, as well as (2) tumor diameter and anatomy, including contact to peripancreatic vessels (SMA, GDA, CHA, PV, SMV). Routinely resected mesopancreatic and perivascular (SMA and PV/SMV) tissue was histopathologically re-analyzed and histopathology correlated with radiographic findings. A logistic regression of survival was performed. Results: MDCT-predicted tumor diameter correlated with pathological T-stage, whereas presumed tumor contact and fat stranding to SMA and PV/SMV predicted and correlated with histological cancerous infiltration. Importantly, mesopancreatic fat stranding predicted MP cancerous infiltration. Positive MP infiltration was evident in over 78%. MPS and higher CT-predicted tumor diameter correlated with higher R1 resection rates. Patients with positive MP stranding had a significantly worse overall survival (p = 0.023). Conclusions: A detailed preoperative radiographic assessment can predict mesopancreatic infiltration and tumor morphology and should influence the decision for primary surgery, as well as the extent of surgery. To increase the rate of R0CRM− resections, MPS should be considered in the decision for neoadjuvant therapy.