K Hörmann

Technische Universität München, München, Bavaria, Germany

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Publications (508)519.97 Total impact

  • [show abstract] [hide abstract]
    ABSTRACT: Urticaria describes a heterogeneous group of diseases, whose cardinal symptoms are itching wheals. With a high life time prevalence of 25%, this disease is of major relevance, and the ENT specialist should be familiar with this disease. The most common type is spontaneous Urticaria in which the wheals seem to arise without provocation. Its subtypes are acute and chronic. The mechanism of wheal formation is the activation and degranulation of mast cells. However, the etiology of the wheals is multifaceted. In case of acute spontaneous urticaria, the underlying cause does not have to be verified. It is treated symptomatically by its self-limiting course of disease. The chronic spontaneous, less frequent form of urticaria is treated curatively by identification and elimination of underlying causes, such as autoimmune processes, intolerance to food additives and chronic infections. The chronic subtype can persist for years and thus has an extensive socioeconomic impact. This article overviews the clinical symptoms, diagnostic methods and therapeutic options for both acute spontaneous and chronic spontaneous urticaria, and refers to the current international EAACI/WAO and German DGAKI/DDG S3 guidelines.
    HNO 05/2012; 60(5):457-65; quiz 466. · 0.42 Impact Factor
  • K. Hörmann, K. Hirth
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    ABSTRACT: Die Autoren der im Journal of the American Medical Association (JAMA) veröffentlichten Studie kommen zu dem Schluss, dass sowohl die Adenotomie (AT) als auch die Adenotonsillektomie (TEAT) lediglich im ersten postoperativen Jahr zu einer Reduktion der Häufigkeit der Otitiden führt, dieser Effekt in den nachfolgenden Jahren jedoch nicht mehr gesehen wird. Die Autoren folgern daraus, dass aufgrund der Operationsmorbidität sowie Komplikationsrate und nicht zuletzt auch der Kosten auf eine operative Therapie zugunsten einer gezielten Antibiotikatherapie sowie ggf. der Einlage von Paukenröhrchen verzichtet werden sollte. Diese Betrachtungsweise erscheint einseitig und soll im nachfolgenden Beitrag diskutiert werden.
    HNO 04/2012; 48(9):637-638. · 0.42 Impact Factor
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    ABSTRACT: The need for surgical treatment alternatives for obstructive sleep apnea is unchanged. However, recommendations regarding these treatments can often only be given with caution as there are only a limited number of controlled studies available. To perform controlled trials and even more so placebo controlled trials in the field of sleep surgery is challenging, especially in comparison to studies evaluating conservative approaches. Nevertheless, these studies can be carried out also in the field of sleep surgery. In this review we present recent concepts and high-quality surgical trials with innovative study designs. A Medline search revealed 310 studies regarding surgical treatment of sleep apnea. These studies were assessed regarding quality, execution and number of subjects. A total of 12 randomized controlled studies were identified addressing palatal implants, radio-frequency surgery, nasal surgery, maxillomandibular advancement and laser-assisted uvulopalatoplasty (LAUP). Furthermore this review addresses the limitations of surgical studies and the differences compared to trials dealing with conservative approaches. The studies presented in this review demonstrate that high-quality trials regarding surgical treatment of obstructive sleep apnea are feasible and can lead to recommendations with high evidence levels.
    HNO 04/2012; 60(4):294-9. · 0.42 Impact Factor
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    ABSTRACT: In a former study, taste disturbances after tonsillectomy seemed to be more frequent than expected. Eight percent of patients reported subjective taste disorders 6 months after tonsillectomy. Fifteen patients from the initial trial, who reported taste disorders after tonsillectomy, were contacted again for this long-term follow-up. A telephone interview using the same questionnaire addressing the current self-estimate of taste function was performed. At 32 ± 10 months following surgery, two (0.9%) patients still reported suffering from taste disturbance. This long-term follow-up study shows that dysgeusia following tonsillectomy occurs in approximately 1% of patients. These data should be considered when patients are informed about complications after tonsillectomy.
    The Laryngoscope 03/2012; 122(6):1265-6. · 1.98 Impact Factor
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    ABSTRACT: Perturbation of semicircular canal function may result in a pathological angular vestibulo-ocular reflex (aVOR). The resulting impairment in gaze stabilization is perceived as "vertigo" or "dizziness" and may occur following receptor function impairment of all three semicircular canals. The head impulse test reveals hidden (covert-catchup) or visible (overt-catchup) saccades in disturbances of semicircular function. Most peripheral vestibular disorders can be treated conservatively. There are surgical treatment options for some diseases, such as intractable benign paroxysmal positional vertigo and superior semicircular canal dehiscence. Vestibular training promotes central reorganization of the VOR. Impaired semicircular receptor function, in particular bilateral vestibulopathy, may affect spatial orientation and cognitive processes. Balance prostheses could serve as a replacement for receptors in the future.
    HNO 03/2012; 60(3):249-59; quiz 260-1. · 0.42 Impact Factor
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    ABSTRACT: To evaluate the efficacy and safety of a phytotherapeutic nasal spray containing Cyclamen europaeum (CE) in the treatment of acute rhinosinusitis (ARS). We performed a randomized, double-blind, placebo-controlled trial of CE nasal spray once daily for 15 days in 99 adult patients with moderate-to-severe ARS who also received amoxicillin 500 mg three times daily for the first 8 days. The primary endpoint was the change in mean total symptom scores (TSS) on day 7. Secondary endpoints included individual symptom scores (nasal congestion, mucus secretion, facial pain, impairment of smell) and endoscopic findings on days 7 and 15 and others. No statistically significant difference in TSS was noted for CE versus placebo on day 7. Moreover, the individual scores were not statistically different between the groups for the ITT-population on day 7. However, both a reduction in facial pain and an improvement in endoscopically-assessed mucosal obstruction significantly favoured CE on day 7. The most common adverse events were nasal burning and mild epistaxis, but no severe adverse events were documented. In summary, this is the first randomized controlled trial on phytotherapy in patients with moderate-to-severe ARS demonstrating clinical safety and some encouraging effects of CE which merit to investigate phytotherapeutic products in further large-scale clinical trials.
    Rhinology 03/2012; 50(1):37-44. · 1.72 Impact Factor
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    ABSTRACT: The incidence of head and neck squamous cell carcinoma (HNSCC) is increasing and currently they account for 5% of all malignancies worldwide. Inspite of ongoing developments in diagnostic imaging and new therapeutic facilities, HNSCC still represents a multidisciplinary challenge. One of the most important prognostic factors in HNSCC is the presence of lymph node metastases. Patients with confirmed nodal involvement have a considerable reduction of their 5-year overall survival rate. In the era of individually optimised surgery, chemotherapy and intensity modulated radiotherapy, the main role of pre- and posttherapeutic imaging remains cancer detection at an early stage and accurate follow-up. The combined effort of early diagnosis and close patient monitoring after surgery and/or radio-chemotherapy influences disease progression and outcome prediction in patients with HNSCC. This review article focuses on currrent oncologic concepts and emerging tools in imaging of head and neck squamous cell cancer. Besides the diagnostic spectrum of the individual imaging modalities, their limitations are also discussed. One main part of this article is dedicated to PET-CT which combines functional and morphological imaging. Furthermore latest developments in MRT are presented with regard to lymph node staging and response prediction. Last but not least, a clinical contribution in this review explains, which information the head and neck surgeon requires from the multimodality imaging and its impact on operation planning.
    Laryngo-Rhino-Otologie 03/2012; 91 Suppl 1:S27-47. · 0.82 Impact Factor
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    ABSTRACT: Complementary and alternative medicine (CAM) represents a wide range of treatment modalities. CAM products may interact with enzymes, transport proteins, and may therefore influence drug metabolism. The prevalence and patterns of CAM usage among patients with head and neck carcinoma (HNC) are largely unknown. This cross-sectional study was designed to document pattern of CAM consumption in patients with HNC. Statistical differences in a significantly higher prevalence of CAM consumption between tumor patients (n = 107) and the control group (n = 112) could be detected. Concerning the frequency of CAM usage, we could document a significant increased consumption of CAM among tumor patients (42.8% vs. 62.6%) especially for herbal teas (P < 0.05), phytotherapy (P < 0.001), supplement products (P < 0.05), and "other" supplements (P < 0.005) comparing the controls. Furthermore a significant influence of female gender and an increased CAM usage could be illustrated. Concerning the knowledge of potential interactions of CAM consumption, only 6.25% of the controls and 19.6% of tumor patients know about possible side effects but only 1.7% of the controls and 6.5% of the tumor patients informed their physician about the CAM usage. The frequency of CAM in head and neck tumor patients seems to be relevant in the supervision of anticancer therapies.
    Nutrition and Cancer 02/2012; 64(3):377-85. · 2.70 Impact Factor
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    ABSTRACT: PURPOSE: Success rates of non-ventilation therapies for sleep disordered breathing (SDB) remain hardly acceptable. Drug-induced sleep endoscopy (DISE) tends to show the level and mechanism of obstruction and helps to specify therapy individually. Therefore, increasing success rates are expected. The objective of this study is to detect whether locations of treatment recommendations given after DISE are different to those made after clinical basic ENT (ear, nose, throat) examination (CBE). METHODS: This study included patients with obstructive sleep apnea (OSA) and primary snoring who wish or require an alternative therapy to the gold standard, continuous positive airway pressure (CPAP). After CBE, a theoretical treatment recommendation was given comprising surgery (possible surgical target: soft palate, tonsils, tongue base, epiglottis) and mandibular advancement splints (MAS) or both. A second ENT specialist conducted a DISE and independently recommended a second therapy concept without knowing the first one. A third person compared both theoretical locations of treatment recommendations (CBE vs. DISE). RESULTS: A total of 97 patients (eight female and 89 male, age 30-85 years, AHI 1.9-88.6/h, body mass index [BMI] 20.3-36.3 kg/m²) received two therapy recommendations. Regarding surgical options only, 63.9% of the examined patients got a different recommendation in at least one of four levels. If MAS was included, a change was found in 78.4% of the patients. Subdivided into each type of intervention, the following changes were found in the therapy concept: 24.7% (n = 24/97) soft palate, 12.4% (n = 12/97) tonsils, 33.0% (n = 32/97) tongue base, 27.8% (n = 27/97) epiglottis, 38.1% (n = 37/97) MAS. CONCLUSIONS: DISE shows a relevant influence on the location of treatment recommendation. Thus, a change in success rates of non-CPAP therapy in OSA and snoring appears possible.
    Sleep And Breathing 01/2012; · 2.26 Impact Factor
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    ABSTRACT: Palatal implants have been used to treat snoring and mild to moderate obstructive sleep apnea (OSA). Two previous controlled trials have published conflicting results regarding the effects of palatal implants on objective outcome measures, although they both could demonstrate superiority over placebo. The aim of the present study was to assess the effects of palatal implants in patients with mild to moderate sleep apnea in a randomised, placebo-controlled trial. Twenty-two patients with mild to moderate OSA (AHI 18 ± 5, BMI 28 ± 3, age 51 ± 13 years) due to palatal obstruction were enrolled in this randomised, double-blind, placebo-controlled trial. Respiratory parameters and sleep efficiency (evaluated by polysomnography), snoring (evaluated by the bed partner), and daytime sleepiness (evaluated by ESS) were assessed before and 90 days after surgery. One patient in each group did not show up for follow-up. The AHI, HI and LSAT showed statistically significant improvement in the treatment group (p < 0.05). Snoring as rated by bed partners also showed statistically significant improvement within the treatment group (p = 0.025). There was no statistical difference when comparing the means of the treatment group with the placebo group. There were no peri- or post-operative complications and no extrusions during the follow-up period. The study supports the idea that palatal implants lead to a reduction in respiratory events in patients with mild to moderate OSA, although a statistically significant superiority of palatal implants over placebo could not be demonstrated in this trial.
    Archives of Oto-Rhino-Laryngology 01/2012; 269(7):1851-6. · 1.29 Impact Factor
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    ABSTRACT: The most common neoplasm arising in the upper aerodigestive tract is head and neck squamous cell carcinoma (HNSCC). Tumor growth, invasion and systemic dissemination is a multistep process of dysregulated cellular signaling pathways and an altered cell-cell and cell-matrix interaction. Aberrant Wnt/β-catenin signaling is linked to tumor development and dissemination in several tumor entities. β-catenin is a multifunctional protein within the canonical Wnt pathway, which is an important factor for reducing cell-cell adhesion in malignant tissue and for triggering cell cycle progression and unscheduled proliferation. Another pivotal factor in carcinogenesis is the tyrosine kinase receptor c-kit, which in the case of dysregulated expression is associated with neoplastic transformation in epithelial tissue. This study evaluates the expression pattern of secreted and nuclear β-catenin and c-kit in p16-positive and HPV-negative squamous cell carcinomas (SCC) and the vulnerability of therapy with the tyrosine kinase inhibitor imatinib as a potential targeted treatment modality compared to platinum-based chemotherapeutic drugs. The different squamous tumor cell lines were incubated with increasing concentrations of carboplatin (3 or 7.5 µmol/ml) and imatinib (18 or 30 µmol/ml). ELISA and immunohistochemical methods were carried out after 48, 72, 120, 192 and 240 h. We detected a reliable trend towards significantly decreased cytosolic and nuclear β-catenin and c-kit expression levels in p16-positive SCC and non-HPV HNSCC cells induced by imatinib exposure for an extended incubation period, whereas platinum-based agents had no or, at best, a slight influence. Virus-transformed squamous cell carcinoma (CERV196) cells were characterized by a reduced susceptibility to an imatinib-altered β-catenin expression. Further studies are planned to investigate this observance in HPV-positive HNSCC in vitro. The implementation of a selective molecular therapy in established chemotherapeutic regimes may enhance the efficacy of platinum-based chemotherapy without increased toxicity and could thus improve the clinical outcome in HNSCC, irrespective of the HPV status.
    Oncology Reports 01/2012; 27(1):270-80. · 2.30 Impact Factor
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    ABSTRACT: The perception and conversion of motion stimuli by the vestibular receptors, unimpaired postural control and intact visual acuity are essential for spatial orientation. Disturbances in these three sensory systems can manifest as "vertigo", "dizziness" or "imbalance". The integrity of peripheral receptor function, especially of the three semicircular canals, plays a superficial role. They are sensitive to acceleration stimuli, which they transmit via reflexes to the eye muscles. The stabilization of a visual target is via vestibulo-ocular reflexes, which have a very short latency and thus ensure a permanently stable image on the retina. Modern lateral-specific testing procedures are available to diagnose the receptor function of the peripheral vestibular system. The function of the semicircular canals can be analyzed using a head impulse test (HIT) and, more recently, by means of video-HIT as well as on the basis of a caloric test. Using these techniques, all three semicircular canals can be assessed in a side- and receptor-specific manner.
    HNO 01/2012; 60(1):75-87; quiz 88. · 0.42 Impact Factor
  • HNO 12/2011; 60(2):141-62. · 0.42 Impact Factor
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    ABSTRACT: The risk of falling increases with age. The problem of falls in medical care constantly rises in priority due to demographic changes in Germany. Therefore, the risk of falling should be assessed in all patients. The present study was intended to evaluate the frequency of falls in daily ENT outpatient medical care and the importance of risk factors. A multicentre study was performed in six outpatient facilities based on a survey of falls and fall risk factors in patients living at home (n = 673) aged 60 years and older. Falls are a frequent problem in the elderly. A total of 23% had one and 13.7% more than one fall within the previous year. Of these, 15% suffered injury, while only 13% used some form of fall prevention. Joint pain and problems of the hip and lower extremities (42.6%), abnormal gait (41.3%), dizziness and balance disorders (38%) as well as impaired activities of daily living (35%) are the most common risk factors for falls and multiple falls in all age groups. Impaired hearing is a fall risk factor in elderly patients. Falls are a frequent problem in patients in ENT outpatient medical care. Fall prevention is advisable in the context of an interdisciplinary approach.
    HNO 10/2011; 60(5):446, 448-56. · 0.42 Impact Factor
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    ABSTRACT: To develop a new, custom-made pressure device that can be used with established designs as an adjuvant therapy for optimized treatment of auricular keloids. Seven patients (4 males, 3 females; mean [SD] age, 22.6 [8.3] years) were treated with surgical excision and corticosteroid injection followed by application of our new auricular pressure device. All patients tolerated the adjuvant therapy and wore the device overnight for 5 nights per week. Usage was not interrupted or cancelled. No recurrence was observed during the follow-up period (mean [SD] duration of follow-up, 24 [6] months). All patients were satisfied with the results; none described pruritus, pain, or dysesthesia. Overnight usage of the new pressure device seems to be a safe and effective extension of established auricular keloid therapy with the potential for prophylaxis of recurrence.
    Archives of facial plastic surgery: official publication for the American Academy of Facial Plastic and Reconstructive Surgery, Inc. and the International Federation of Facial Plastic Surgery Societies 08/2011; 14(1):20-6. · 1.31 Impact Factor
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    ABSTRACT: Treatment of skeletal muscle loss due to trauma or tumor ablation therapy still lacks a suitable clinical approach. Creation of functional muscle tissue in vitro using the differentiation potential of human satellite cells (myoblasts) is a promising new research field called tissue engineering. Strong differentiation stimuli, which can induce formation of myofibers after cell expansion, have to be identified and evaluated in order to create sufficient amounts of neo-tissue. The objective of this study was to determine the influence of static magnetic fields (SMF) on human satellite cell cultures as one of the preferred stem cell sources in skeletal muscle tissue engineering. Experiments were performed using human satellite cells with and without SMF stimulation after incubation with a culture medium containing low [differentiation medium (DM)] or high [growth medium (GM)] concentrations of growth factors. Proliferation analysis using the alamarBlue assay revealed no significant influence of SMF on cell division. Real-time RT-PCR of the following marker genes was investigated: myogenic factor 5 (MYF5), myogenic differentiation antigen 1 (MYOD1), myogenin (MYOG), skeletal muscle α1 actin (ACTA1), and embryonic (MYH3), perinatal (MYH8) and adult (MYH1) skeletal muscle myosin heavy chain. We detected an influence on marker gene expression by SMF in terms of a down-regulation of the marker genes in cell cultures treated with SMF and DM, but not in cell cultures treated with SMF and GM. Immunocytochemical investigations using antibodies directed against the differentiation markers confirmed the gene expression results and showed an enhancement of maturation after stimulation with GM and SMF. Additional calculation of the fusion index also revealed an increase in myotube formation in cell cultures treated with SMF and GM. Our findings show that the effect of SMF on the process of differentiation depends on the growth factor concentration in the culture medium in human satellite cultures. SMF alone enhances the maturation of human satellite cells treated with GM, but not satellite cells that were additionally stimulated with serum cessation. Therefore, further investigations are necessary before consideration of SMF for skeletal muscle tissue engineering approaches.
    International Journal of Molecular Medicine 08/2011; 28(6):907-17. · 1.96 Impact Factor
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    ABSTRACT: Nitric oxide (NO) is a potent biological mediator, and has a regulatory role in a wide variety of cellular and tissue functions. In the upper and lower airways, NO has been suggested to be involved in different functions with regulatory, protective, defensive or damaging effects. It is obvious that NO plays an important role in host defense, and is liberated in the nose and the paranasal sinuses. This review aims to highlight some aspects of the origin and function of NO in airway diseases, such as allergic rhinitis, chronic rhinosinusitis with and without nasal polyps, primary ciliary dyskinesia, and cystic fibrosis. In conclusion, NO measurement may be a promising noninvasive diagnostic marker for airway pathologies.
    International Archives of Allergy and Immunology 08/2011; 156(4):352-61. · 2.25 Impact Factor
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    ABSTRACT: In the recent past, evidence is increasing indicating the existence of a subpopulation of resistant tumor cells in head and neck squamous cell carcinoma (HNSCC) that cannot be eradicated by established antineoplastic treatments. These cancer stem cells (CSCs) have features of somatic stem cells such as selfrenewal, proliferation and differentiation. CD44+ cells in tumors of the head and neck are referred to as CSCs of HNSCC. Expression profiling of CD44 in 29 HNSCC tumors was performed by fluorescence microscopy. ELISA analysis was performed to detect concentration of soluble CD44 in the peripheral blood of 29 HNSCC patients and 11 healthy controls. Expression of CD44 was determined in all HNSCC tissue samples (n=29). In all samples a surface staining pattern was found. The concentration of CD44 in the peripheral blood of HNSCC patients was significantly higher compared to a healthy control group (mHNSCC =13.5 ± 0.5 ng/ ml; mCont = 9.3 ± 0.6 ng/ml; P=0.6 x 10(-12)). The role of CD44 as a marker for CSCs in HNSCC remains to be ascertained. Further experiments might reveal its role as a diagnostic and prognostic factor, and possibly as a therapeutic target.
    Oncology Reports 08/2011; 26(2):321-6. · 2.30 Impact Factor
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    ABSTRACT: Head and neck squamous cell carcinoma (HNSCC) is an aggressive epithelial malignancy known to be the most common neoplasm appearing in the upper aerodigestive tract. The poor five-year survival rate has remained unchanged in the last decades despite the emergence of improved techniques in surgery, radiation and chemotherapy. In the last 20 years awareness of a subset of squamous cell carcinomas induced by oncogenic forms of the human papilloma virus (HPV) (high-risk types 16 and 18) has increased. The incidence of HPV-associated oropharyngeal cancer is rising, indicating the increased importance of the viral etiology. Cell proliferation, migration, induction of tumor vascularization and carcinogenesis, as well as invasion facilitation is regulated by a variety of angiogenic peptides like PDGF, PDGF-R and VEGF. They might be an encouraging target for biological anticancer therapy by inhibiting disrupted cellular signaling pathways. Imatinib has been shown to target specific tyrosine kinases, inhibiting proliferation in various cancer entities. The purpose of this study was to evaluate the expression pattern of angiogenic factors (VEGF, PDGF and PDGF-R) in HPV-positive (p16-CERV196 SCC) and (-negative squamous cell carcinoma (HNSCC). The study also evaluated the vulnerability of anti-angiogenesis therapy depending on the HPV status as potential treatment modality compared to established platinum-based chemotherapeutic drugs. The different squamous tumor cell lines were incubated with increasing concentrations of carboplatin (3 and 7.5 µmol) and imatinib (18 and 30 µmol). ELISA immunohistochemical methods were carried out after 48, 72, 120, 192 and 240 h. We demonstrated a significant reduction of VEGF and PDGF-Rα/β expression patterns after incubation of imatinib in ELISA and immunohistochemical methods, irrespective of the HPV status of the tumor cells, whereas the application of carboplatin had no impact on the expression of angiogenic peptides. Viral oncogen-transformed squamous cell carcinoma (CERV196) cells were characterized by a reduced susceptibility for an imatinib-altered VEGF expression. Further studies are planned to investigate this observance in HPV-positive HNSCC in vitro. The implementation of a selective molecular anti-angiogenic therapy in established chemotherapeutic regimens may enhance the efficacy of platinum-based chemotherapy without an increased toxicity profile and could thus improve the clinical outcome in HNSCC, irrespective of the HPV status.
    Oncology Reports 07/2011; 26(5):1099-109. · 2.30 Impact Factor
  • L E Walther, H Schaaf, D Sommer, K Hörmann
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    ABSTRACT: Vestibular-evoked myogenic potentials (VEMP) are widely used to assess vestibular function. Air conducted (AC) cervical VEMP (cVEMP) reflect sacculus and inferior vestibular nerve function. Ocular VEMP (oVEMP) however has been hardly examined up to now. In recent studies it has been assumed that AC oVEMP probably reflects superior vestibular nerve function. The aim of this pilot study was to evaluate clinical application of the AC oVEMP. AC oVEMP were recorded in patients with peripheral vestibular disorders (n=21). In addition thermal irritation and head impulse test were performed and AC cVEMP were recorded. For intense AC-sound stimulation tone bursts (500 Hz) with 100 dB nHL were used. In peripheral vestibular disorders AC oVEMP and AC cVEMP could be classified into: • type 1 (inferior vestibular neuritis) with loss of AC oVEMP but normal AC cVEMP, • type 2, probable type of superior vestibular neuritis, showing present AC cVEMP but loss of AC oVEMP, • type 3, probable complete vestibular neuritis, without AC oVEMP and AC cVEMP. AC oVEMP may be used as an appropriate test for clinical investigation in patients with vestibular disorders. AC oVEMP is an additional, essential test for assessing otolith function beside AC cVEMP. Further vestibular test are necessary for precise clinical interpretation.
    Laryngo-Rhino-Otologie 07/2011; 90(10):596-603. · 0.82 Impact Factor

Publication Stats

2k Citations
519.97 Total Impact Points


  • 2013
    • Technische Universität München
      München, Bavaria, Germany
  • 1995–2013
    • Universität Mannheim
      Mannheim, Baden-Württemberg, Germany
    • Universität Heidelberg
      • • Faculty of Medicine Mannheim and Clinic Mannheim
      • • Institute of Hygiene
      Heidelberg, Baden-Wuerttemberg, Germany
  • 2012
    • HELIOS Klinikum Berlin-Buch
      Berlín, Berlin, Germany
  • 2009–2012
    • Universitätsmedizin Mannheim
      Mannheim, Baden-Württemberg, Germany
    • Central Institute of Mental Health
      Mannheim, Baden-Württemberg, Germany
  • 2011
    • University of Cologne
      • Faculty of Medicine
      Köln, North Rhine-Westphalia, Germany
  • 1997–2010
    • Westpfalz-Klinikum GmbH
      Kaiserlautern, Rheinland-Pfalz, Germany
    • Johannes Gutenberg-Universität Mainz
      Mayence, Rheinland-Pfalz, Germany
  • 2008–2009
    • Asklepios Klinik Harburg
      Hamburg, Hamburg, Germany
  • 2005–2008
    • Universitätsklinikum Münster
      Muenster, North Rhine-Westphalia, Germany
    • The Australian Society of Otolaryngology Head & Neck Surgery
      Evans Head, New South Wales, Australia
  • 2007
    • University of Münster
      Muenster, North Rhine-Westphalia, Germany
  • 2003
    • Deutsche Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie e.V.
      München, Bavaria, Germany
  • 2001
    • Ruhr-Universität Bochum
      Bochum, North Rhine-Westphalia, Germany
  • 1993–1996
    • Technische Universität Kaiserslautern
      Kaiserlautern, Rheinland-Pfalz, Germany
  • 1987
    • University of Hamburg
      Hamburg, Hamburg, Germany