Michael R. Mallmann

Dr. Michael R. Mallmann

orcid

Research Focus & Metrics

Academic Career Length

13Years (2014-Present)

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

Representative Publications

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4 June 2014 in International Journal of Cancer
Verified
Journal Article
Open access
PDF file
OZOliver Zivanovic
Oliver Zivanovic
AAAlina Abramian
Alina Abramian
MKMaximilian Kullmann
Maximilian Kullmann
CFChristine Fuhrmann
Christine Fuhrmann
CCChristoph Coch
Christoph Coch
JHJoshua Honeyman
Joshua Honeyman
This phase I study tested the safety, feasibility, pharmacokinetics and pharmacodynamics of cisplatin administered as hyperthermic intraoperative intraperitoneal chemoperfusion (HIPEC) in patients with platinum‐sensitive recurrent epithelial ovarian cancer (EOC) undergoing secondary cytoreductive surgery followed by postoperative platinum‐based intravenous chemotherapy. Twelve patients with operable, recurrent platinum‐sensitive EOC (recurrence ≥6 months after first‐line therapy) were included according to the classical 3+3 dose‐escalation design at three dose levels—60, 80 and 100 mg/m2. After surgical cytoreduction, a single dose of cisplatin was administered via HIPEC for 90 min at 41–43°C. Postoperatively, all patients were treated with standard intravenous platinum‐based combination chemotherapy. One of six patients experienced a dose‐limiting toxicity (grade 3 renal toxicity) at a dose of 100 mg/m2. The remaining five patients treated with 100 mg/m2 tolerated their treatment well. The recommended phase II dose was established at 100 mg/m2. The mean peritoneal‐to‐plasma AUC ratio was 19·5 at the highest dose level. Cisplatin‐induced DNA adducts were confirmed in tumor samples. Common postoperative grade 1–3 toxicities included fatigue, postoperative pain, nausea, and surgical site infection. The ability to administer standard intravenous platinum‐based chemotherapy after HIPEC was uncompromised. Cisplatin administered as HIPEC at a dose of 100 mg/m2 has an acceptable safety profile in selected patients undergoing secondary cytoreductive surgery for platinum‐sensitive recurrent EOC. Favorable pharmacokinetic and pharmacodynamic properties of HIPEC with cisplatin were confirmed at all dose levels, especially at 100 mg/m2. The results are encouraging to determine the efficacy of HIPEC as a complementary treatment in patients with EOC.

8 October 2019 in Fetal Diagnosis and Therapy
Verified
Journal Article
Closed access
PDF file
MMMichael R. Mallmann
Michael R. Mallmann
UHUlrike Herberg
Ulrike Herberg
IGIngo Gottschalk
Ingo Gottschalk
BSBrigitte Sabine Strizek
Brigitte Sabine Strizek
AHAstrid Hellmund
Astrid Hellmund
CBChristoph Berg
Christoph Berg
Objective: To assess the intrauterine course and outcome of fetal cardiac intervention (FCI) in fetuses with critical aortic stenosis (CAS), severe mitral regurgitation (MR), severe left atrial dilatation (LAD), and restrictive foramen ovale (RFO) or intact atrial septum. Methods: All fetuses with a prenatal diagnosis of CAS, severe MR, severe LAD, and RFO were retrospectively collected in one tertiary center for fetal medicine over a period of 10 years. Video recordings, pre- and postnatal charts were reviewed for cardiac and extracardiac anomalies, intrauterine course, and postnatal outcome. Results: Nineteen fetuses with CAS, severe MR, severe LAD, and RFO were diagnosed in the study period. In 5 cases, FCI was not considered as the parents either opted for expectative management or for termination. In the remaining 14 fetuses, 21 FCI were performed: 14 balloon valvuloplasties, 2 atrioseptostomies, and 5 fetal atrial stent insertions. Seven of 14 fetuses (50%) had fetal hydrops, 5 of 14 fetuses (36%) presented with intact atrial septum. Procedure-related death occurred in 5 fetuses after aortic valvuloplasty or concomitant atrioseptostomy but in none after fetal atrial stenting. Due to progressive hydrops, two terminations of pregnancy were performed. Among the 7 live births, 3 died in the neonatal period. The remaining 4 received single ventricle palliation, 2 following fetal aortic valvuloplasty and 2 after fetal atrial stent insertion. Conclusions: CAS with severe MR, severe LAD, and RFO has a high overall mortality even in cases undergoing intrauterine intervention. Parameters that accurately predict the intrauterine and postnatal outcome have yet to be defined.

21 May 2019 in Archives of Gynecology and Obstetrics
Verified
Journal Article
Closed access
PDF file
MMMichael R. Mallmann
Michael R. Mallmann
BMBirte Mack-Detlefsen
Birte Mack-Detlefsen
HRHeiko Reutter
Heiko Reutter
RPRebecca Pohle
Rebecca Pohle
IGIngo Gottschalk
Ingo Gottschalk
UGUlrich Gembruch
Ulrich Gembruch

27 February 2022 in Archives of Gynecology and Obstetrics
Verified
Journal Article
Open access
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MMMichael R. Mallmann
Michael R. Mallmann
UGUlrich Gembruch
Ulrich Gembruch
Introduction: Fetal genital malformations represent a rare and heterogeneous group of congenital malformations of the disorders of sexual development (DSD) spectrum. Methods: A thorough literature review on the main topics in the prenatal approach towards DSD was conducted. Results: First, a thorough overview on prenatal characteristics of the most common fetal genital malformations of ovaries, uterus and external genitalia, and second, a standardized approach for differential diagnosis in the presence of direct and indirect prenatal signs of DSDs. Conclusions: This review is mainly directed towards the aspects of female genital malformations with aspects of male DSD explained as well to aid in the prenatal differential diagnosis.

18 November 2021 in JMIR Cancer
Verified
Journal Article
Open access
CMChristoph A Mallmann
Christoph A Mallmann
CDChristian M Domröse
Christian M Domröse
LSLars Schröder
Lars Schröder
DEDavid Engelhardt
David Engelhardt
FBFrederik Bach
Frederik Bach
MMMichael R. Mallmann
Michael R. Mallmann
Background: Digitalization offers enormous potential in medicine. In the era of digitalization, the development of the use of digital, technical, and informal resources of breast cancer patients and factors influencing the degree of digitization of patients has been insufficiently researched. Objective: The aim of this study was to assess the development of the use of digital technical and informal resources in a well-defined patient cohort. Methods: A longitudinal study on 513 breast cancer patients from 2012 to 2020 was conducted using a questionnaire that included the main aspects of the degree of digitalization, including digital device availability and use, stationary and mobile internet access and use, and communication and information seeking regarding breast cancer diagnosis and treatment. Results: The majority of patients (421/513, 82.1%) owned the technical resources to benefit from eHealth, used the internet to obtain information (292/509, 57.4%), and were willing to use new eHealth solutions (379/426, 89%). Two-thirds of the patients discussed information about their cancer on the internet with their doctor, one-third found additional treatment options on the internet, and 15.3% (44/287) of the patients stated that this had changed their cancer therapy. The degree of digitization is increasing yet still significantly depends on 3 factors: (1) age (whereas 100% [39/39] of the 70-year-old group used the internet), (2) education (internet use significantly depended on education, as only 51.8% [59/114] of patients with primary school education used the internet, but 82.4% [126/153] with middle school education and 90.3% [213/236] with high school education used the internet; P<.001), and (3) household size (67.7% [111/164] of patients living alone used the internet, whereas 84.7% [287/339] of patients living in a house with ≥2 people used the internet; P<.001). Conclusions: To implement digital solutions in health care, knowledge of the composition and degree of the use of digital technical and informal resources of the patient group for which the respective solution is developed is crucial for success. Trial Registration: German Register of Clinical Studies DRKS00012364; https://www.drks.de/drks_web/navigate.do?navigationId=trial.HTML&TRIAL_ID=DRKS00012364

20 October 2023 in Cancers
Verified
Journal Article
Open access
PDF file
LSLars Schröder
Lars Schröder
ARAlexander Rupp
Alexander Rupp
KGKathrin M. E. Gihr
Kathrin M. E. Gihr
MKMakbule Kobilay
Makbule Kobilay
CDChristian M. Domroese
Christian M. Domroese
Stefan HoldenriederStefan Holdenrieder
Stefan Holdenrieder
Background: High mobility group box 1 (HMGB1), soluble receptor of advanced glycation end products (sRAGE) and programmed cell death markers PD-1 and PD-L1 are immunogenic serum biomarkers that may serve as novel diagnostic tools for cancer diagnosis. Methods: We investigated the four markers in sera of 231 women, among them 76 with ovarian cancer, 87 with benign diseases and 68 healthy controls, using enzyme immunoassays. Discrimination between groups was calculated using receiver operating characteristic (ROC) curves and sensitivities at fixed 90% and 95% specificities. Results: HMGB1 levels were significantly elevated and sRAGE levels were decreased in cancer patients as compared to benign and healthy controls. In consequence, the ratio of HMGB1 and sRAGE discriminated best between diagnostic groups. The areas under the curve (AUCs) of the ROC curves for differentiation of cancer vs. healthy were 0.77 for HMGB1, 0.65 for sRAGE and 0.78 for the HMGB1/sRAGE ratio, and slightly lower for the differentiation of cancer vs. benigns with 0.72 for HMGB1, 0.61 for sRAGE and 0.74 for the ratio of both. The highest sensitivities for cancer detection at 90% specificity versus benign diseases were achieved using HMGB1 with 41.3% and the HMGB1/sRAGE ratio with 39.2%, followed by sRAGE with 18.9%. PD-1 showed only minor and PD-L1 no power for discrimination between ovarian cancer and benign diseases. Conclusion: HMGB1 and sRAGE have differential diagnostic potential for ovarian cancer detection and warrant inclusion in further validation studies.