Isaak Effendy

Isaak Effendy
Franziskus Hospital Bielefeld · Deartment of Internal Medicine

Prof. Dr. med.
Dermatology Consultant - Franziskus Hospital Bielefeld, Germany

About

243
Publications
40,360
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3,952
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Introduction
Isaak Effendy currently works as dermatology consultant at Franziskus Hospital Bielefeld. Previously held the acting professoship for Dermatology & Venereology, Medical School East Westphalia, University Hospital, University of Bielefeld, Campus Klinikum Bielefeld, Germany.
Additional affiliations
April 2001 - June 2023
Municipal Hospital of Bielefeld - Academic Teaching Hospital of the University of Muenster
Position
  • Head of Department
April 2001 - December 2019
Philipps University of Marburg
Position
  • Lecturer external
January 1996 - March 2001
Philipps University of Marburg
Position
  • Head of the Allergy Clinic
Education
April 1993 - January 1996
University of California, San Francisco USA - Dept. of Dermatology
Field of study
  • Epidermal barrier functions of human skin
October 1982 - April 1993
Philipps University of Marburg - Dept. of Dermatology and Allergology
Field of study
  • Dermatology
September 1975 - February 1982
University of Hamburg - Faculty of Medicine
Field of study
  • Human Medicine

Publications

Publications (243)
Preprint
Full-text available
Hair disorders are often found in patients post-COVID-19 infection, with telogen effluvium (TE) as its most common type. Hair disorders have a major socio-psychological impact on society. Furthermore, vitamin D deficiency may trigger hair loss in post-COVID-19 patients. This study aims to describe the profiles and characteristics of post-COVID-19 p...
Article
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Background There are conflicting data on a potential association between obesity and atopic dermatitis (AD). The purpose of this study was to investigate the relationship between obesity and AD disease severity. Methods Patients from the TREATgermany registry cohort were divided into three groups according to their body mass index (BMI). Due to lo...
Article
Zusammenfassung Hintergrund Das Eczema herpeticatum (EH) ist eine disseminierte Hautinfektion, die durch Herpes‐simplex‐Viren bei Patienten mit atopischer Dermatitis (AD) verursacht wird. Die Häufigkeit des EH und die klinischen Charakteristika von EH Patienten wurden bisher noch nicht in einer größeren Kohorte untersucht. Methodik 87 Patienten d...
Article
Zusammenfassung Hintergrund TREATgermany ist ein multizentrisches Register, das Patienten mit moderater bis schwerer atopischer Dermatitis (AD) aus derzeit 74 Studienzentren (Universitätskliniken, Krankenhäuser und Praxen) in Deutschland umfasst. Bis zum 31. August 2021 wurden 1.230 erwachsene Patienten eingeschlossen. Methoden In TREATgermany fü...
Article
Full-text available
Summary Background: Eczema herpeticum (EH) is a disseminated skin infection caused by herpes simplex virus in atopic dermatitis (AD) patients. The frequency of EH and the clinical features of EH patients have not yet been investigated in a larger cohort. Methods: We sought to investigate the TREATgermany cohort, a multicenter, non-interventional cl...
Article
Full-text available
Background: TREATgermany is a multicenter registry including patients with moderate-to-severe atopic dermatitis (AD) from currently 74 study centers (university clinics, hospitals and practices) in Germany. As of August 31, 2021, 1,230 adult patients were enrolled. Methods: In TREATgermany, patients and physicians fill in questionnaires pertaini...
Article
Onychomycosis is a fungal infection of the fingernails and toenails. In Europe, tinea unguium is mainly caused by dermatophytes. The diagnostic workup compromises microscopic examination, culture and/or molecular testing (nail scrapings). Local treatment with antifungal nail polish is recommended for mild or moderate nail infections. In case of mod...
Article
Onychomycosis is a fungal infection of the fingernails and toenails. In Europe, tinea unguium is mainly caused by dermatophytes. The diagnostic workup comprises microscopic examination, culture and/or molecular testing (nail scrapings). Local treatment with antifungal nail polish is recommended for mild or moderate nail infections. In case of moder...
Article
Full-text available
Highlights: • The importance of having a strong suspicion for syphilis and maintaining close contact between dermatologists and pathologists cannot be understated. • Understanding the clinical relationship and histopathological features of syphilis is crucial for accurate diagnosis and distinction from its histopathologic mimickers. Abstract: S...
Article
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TREATgermany is an investigator-initiated prospective disease registry. It investigates physician- and patient-reported disease severity (Eczema Area and Severity Index (EASI), objective Scoring Atopic Dermatitis (oSCORAD), Investigator Global Assessment, Patient-Oriented Eczema Measure (POEM), Patient Global Assessment (PGA)), patient-reported sym...
Article
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https://doi.org/10.1093/bjd/ljac070 Dear Editor, TREATgermany (www.treatgermany.org) is an investigator-initiated prospective disease registry of daily routine care in patients with atopic dermatitis (AD), aged 18 years and older, who consult a dermatology department or a dermatology practice in Germany. Adults with ­moderate-to-severe AD, who rece...
Article
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Specific immunotherapy with standardized aeroallergens can reduce symptoms and increase the quality of life in some atopic diseases. This therapy is still controversial for atopic dermatitis (AD). Hence, a meta-analysis to assess efficacy and safety of specific immunotherapy with aeroallergens on patients with AD could provide an oversight on advan...
Article
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Background Atopic dermatitis (AD) is chronic inflammatory skin disease that is relapsing and a serious condition that disrupts the quality of life of affected individuals. Probiotics are an immunomodulator that can enhance the immune control of atopic dermatitis. Methods All randomized controlled trials of probiotics for the treatment of adult AD...
Article
This interim analysis from the atopic dermatitis registry TREATgermany shows robust long-term efficacy, favourable safety and high persistence of dupilumab under real life conditions.
Article
Zusammenfassung Hintergrund TREATgermany, ein Register für Patienten mit moderater bis schwerer atopischer Dermatitis (AD), etablierte im Frühjahr 2020 einen zusätzlichen Fragebogen, um Auswirkungen der Corona-Pandemie auf die Lebenssituation von Patienten mit AD zu untersuchen. Methodik Anhand eines Fragebogens wurden allgemeine Informationen zu...
Article
Full-text available
Convenient administration is an important factor for treatment adherence in patients with psoriasis. MATURE study reports the efficacy, safety, tolerability, and pharmacokinetics of secukinumab 300 mg 2 mL autoinjector (AI) from MATURE trial (NCT03589885). Eligible patients were randomized to secukinumab 300 mg 2 mL AI or 2x 1 mL pre-filled syringe...
Article
Background TREATgermany, a registry for patients with moderate to severe atopic dermatitis (AD), established an additional questionnaire in spring 2020 to investigate the effects of the coronavirus pandemic on the daily life of patients with AD. Material and Methods A questionnaire was used to analyze general information regarding a patient’s expe...
Article
Introduction L’étude MATURE a évalué l’efficacité, la sécurité, la tolérance et la pharmacocinétique de l’auto-injecteur (AI) 2 mL de sécukinumab 300 mg chez les patients atteints de psoriasis en plaques modéré à sévère. Nous rapportons ici les résultats de l’analyse du critère principal jusqu’à la semaine 16. Matériel et méthodes MATURE est un es...
Article
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Background: Evidence shows good tolerability in patients for subcutaneous injection volumes up to 3 mL. Objectives: We investigated efficacy, pharmacokinetics, and tolerability of secukinumab 300 mg/2 mL pre-filled syringe (PFS) in patients with moderate to severe plaque psoriasis. Methods: ALLURE was a 52-week, multicenter, randomized (1:1:1)...
Article
Aim The aim of this official guideline, published and coordinated by the German (DGGG), Austrian (OEGGG) and Swiss (SGGG) Societies of Gynecology and Obstetrics in collaboration with the DMykG, DDG and AGII societies, was to provide consensus-based recommendations obtained by evaluating the relevant literature for the diagnosis, treatment and manag...
Article
Full-text available
Approximately 70-75% of women will have vulvovaginal candidosis (VVC) at least once in their lifetime. In premenopausal, pregnant, asymptomatic, and healthy women and women with acute VVC, Candida albicans is the predominant species. The diagnosis of VVC should be based on clinical symptoms and microscopic detection of pseudohyphae. Symptoms alone...
Preprint
Full-text available
Background: Specific immunotherapy with standardized aeroallergens can reduce symptoms and increase the quality of life for related allergy patients. This therapy is still controversial for atopic dermatitis (AD). Hence, a meta-analysis to assess efficacy and safety of specific immunotherapy with aeroallergens on patients with AD could provide a cl...
Article
Full-text available
Background Apart from three biologics, no systemic drugs are approved in Europe for children with moderate‐to‐severe psoriasis. Retrospective observational studies showed promising results for fumaric acid esters (FAE) in this setting. Objectives To show superiority of FAE over placebo in terms of treatment response after 20 weeks in children and...
Article
Full-text available
: Anetoderma is an elastolytic disorder, categorized by singular or multiple areas of macules or papules, which can lead to the herniation of subcutaneous tissue. Anetoderma is rare, and its incidence is unknown. Primary anetoderma or idiopathic anetoderma occurs when there is no underlying associated skin disease with unknown pathogenesis. It can...
Article
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Folliculotropic mycosis fungoides (FMF) is a particular subtype of mycosis fungoides (MF), characterized by an infiltration of neoplastic CD4+ T cells in the epidermis which can spread to all follicular structures, sebaceous glands, sweat glands and hair follicles. Clinically, FMF can exhibit various cutaneous symptoms. However, these symptoms ofte...
Article
Zusammenfassung Onychomykosen sind schwer behandelbare Pilzinfektionen des Nagelorgans mit einer hohen Rezidivrate. Klinische Studien zeigen, dass bei gesicherter schwerer Nagelmykose durch Dermatophyten eine Steigerung der kompletten Heilungsrate (mykologisch plus klinisch) durch eine Kombinationsbehandlung mit lokal applizierten und oral verabrei...
Article
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The German atopic eczema (AE)‐registry TREATgermany is a non‐interventional multicenter patient cohort study for adult patients with currently moderate‐to‐severe disease activity or current/previous anti‐inflammatory systemic treatment.1,2 Dupilumab has demonstrated to be an effective treatment for patients with moderate‐to‐severe AE in clinical tr...
Article
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Zusammenfassung Die Tinea capitis ist eine durch Dermatophyten hervorgerufene, vor allem im Kindesalter auftretende Mykose der behaarten Kopfhaut. Die Diagnostik erfolgt mittels mikroskopischer, kultureller und/oder molekularer Methoden. Die Therapie sollte systemisch und begleitend topisch erfolgen und ist abhängig von dem jeweiligen Erreger. Das...
Article
Full-text available
Tinea capitis describes a dermatophyte infection of scalp and hair that predominately occurs in children. The diagnostic workup includes microscopic examination, culture and/or molecular tests. Treatment is guided by the specific organism involved and should consist of systemic agents as well as adjuvant topical treatment. The aim of the present up...
Article
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Background: The Atopic Dermatitis TREATgermany registry was initiated by the German Society for Dermatology (DDG) in 2011 to evaluate the "real-life" situation of health care for patients with AD. Objectives: Interim data analysis on baseline characteristics as well as current and prescribed systemic treatments of the TREATgermany registry patie...
Article
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Background: Sensitization to methylisothiazolinone (MI) has seen an exceptional epidemic, mainly attributed to its use in cosmetics. Objectives: To trace the epidemic of MI allergy 2009-2018), and to analyse a possible change of patients' characteristics. Methods: IVDK-data of patients patch tested between 2009 and 2018 with MI (0.05 % aq.) we...
Article
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Background: Exposure to ultraviolet A & B (UVA-UVB) plays a role in the survival of human life, but it may cause negative effects, such as immunosuppression and skin cancer. The effect of solar UVA-UVB exposure on apoptosis (Bax/Bcl-2 ratio) of peripheral blood cutaneous lymphocyte antigen (CLA)+ T-lymphocyte; the immune competent cells in the skin...
Article
Background Professional musicians have prolonged and intense physical contact with their instruments. This can lead to occupational skin diseases, particularly irritant and allergic contact dermatitis. Objectives To assess the skin diseases and sensitization patterns common among professional musicians. Methods A retrospective analysis of the dat...
Article
Background The Compositae plant family includes many thousands of species, making it one of the most widespread group of plants worldwide. Sensitization to Compositae allergens may occur in private or in occupational settings. Objectives To monitor the current sensitization spectrum to Compositae allergens, especially in cooks and florists. Metho...
Article
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Background Clinical registries may provide high-quality evidence on the use and effectiveness of therapeutic interventions under real-life conditions. Adults with moderate-to-severe atopic eczema (atopic dermatitis [AD]) are enrolled into TREATgermany and prospectively followed over at least 2 years. This paper analyses the association between derm...
Article
Zusammenfassung Lepra ist eine chronische bakterielle Infektionskrankheit durch Mycobacaterium leprae, derzeit leiden weltweit ca. 3 Millionen Personen. Lepra ist nicht hoch kontagiös, für die Übertragung steht die Tröpfcheninfektion im Vordergrund. Die vielfältigen klinischen Symptome sind durch den Immunstatus des Betroffenen, die aktuelle Bakter...
Article
Zusammenfassung Lepra ist eine chronische bakterielle Infektionskrankheit durch Mycobacterium leprae, derzeit leiden weltweit circa 3 Mio. Personen daran. Lepra ist nicht hoch kontagiös, für die Übertragung steht die Tröpfcheninfektion im Vordergrund. Die vielfältigen klinischen Symptome sind durch den Immunstatus des Betroffenen, die aktuelle Bakt...
Chapter
Sexuell übertragbare Krankheiten („sexually transmitted infections“, STI) sind Infektionskrankheiten, die vorwiegend, jedoch nicht ausschließlich, bei sexuellen Kontakten übertragen werden und deren Symptomatik vorwiegend die Anogenitalregion betrifft. Zu ihnen gehören Granuloma inguinale, Gonorrhoe, Herpes genitalis, HIV-Krankheiten, Molluscum con...
Chapter
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Alle generalisierten Dermatosen können auch die Anogenitalregion betreffen. Ihre Symptome und Phänomene werden durch die Besonderheiten der Region modifiziert. Die Betrachtung des übrigen Integuments führt zur Diagnose. Das folgende Kapitel stellt einige besonders prägnante Dermatosen vor.
Book
Blickdiagnose für Hausärzte, Urologen, Gynäkologen und Dermatologen! Hautkrankheiten im Bereich des männlichen und weiblichen Genitale werden durch die Eigenheiten der Genitalregion modifiziert. Eine Reihe davon manifestiert sich aber auch nur im Genitalbereich. Diese werden oft erstmals von einem Facharzt beobachtet, der sich mit anderen genitale...
Chapter
Lepra kommt heute fast ausschließlich in den sog. Entwicklungsländern Südamerikas, Afrikas und Asiens vor. Allerdings erkrankt nur ein Bruchteil aller exponierten Menschen an Lepra. Die höchste Inzidenzrate findet sich zwischen dem 10. und 20. Lebensjahr. Weltweit leiden ca. 3 Millionen Leprakranke an irreversiblen Körperschäden, und sie benötigen...
Chapter
Tiefe Trichophytien kommen überall vor. In den Tropen können sie jedoch schwerwiegend sein, da die Diagnose und die Therapie häufig verzögert erfolgen. Eine systemische antimykotische Behandlung ist in der Regel von vorneherein indiziert.
Chapter
Die Parakokzidioidomykose gehört zu den Systemmykosen und kommt vor allem in Endemiegebieten Amerikas vor. Sie befällt in erster Linie die Lunge, jedoch können auch andere Organe mit in Leidenschaft gezogen werden.
Chapter
Die Histoplasmose stellt eine endemische Systemmykose in Nordamerika dar. Initial zeigen die Erkrankten pulmonale Symptome. Es ist jedoch anzunehmen, dass 99 % der Infektionen spontan abheilen, meist ohne jegliche pulmonale Symptome.
Chapter
Die Chromomykose ist eine über Jahre langsam progrediente Hautpilzinfektion, die meist durch einen traumatischen Kontakt mit Saprophyten hervorgerufen wird. Das klinische Bild wird durch den Erreger und die Immunitätslage des Erkrankten maßgeblich beeinflusst.
Article
Full-text available
Chronic moderate or severe ulcer pain reported in 37%1 to 75%2,3 of patients is associated with anxiety, depression1 and deleterious effects on quality of life3. Eutectic Mixture of Lignocaine (lidocaine) and Prilocaine (EMLA™) cream significantly reduces pain of sharp debridement4-9 and the occurrence of post debridement pain9. A single dose of 5–...
Article
Full-text available
Foot mycoses belong to the most frequent human infectious diseases in industrialized countries. Based on a large European study on the prevalence of this disease, an estimated one third of the total adult population is suffering from mycosis of the foot [1]. More than half of these patients are affected by a fungal infection of the nail (onchomycos...
Article
Full-text available
Phlebologic diseases have become extremely common and have major socio-economic impact. However, the percentage of dermatologists working in phlebology appears to be decreasing according to the data of the German Society of Phlebology (DGP). To investigate the reasons for this development, we-on behalf of the DGP-sent a questionnaire to 120 German...
Article
No consistent data are available on the currently employed diagnostic tools for autoimmune bullous diseases in Germany. The aim of this survey was to describe currently performed diagnostic methods for bullous autoimmune diseases in German dermatology departments. A standardized questionnaire evaluated the available diagnostic methods i. e. direct...
Article
Zusammenfassung. Durch ungeeignete Fußbekleidung können bestehende Tinea pedis und Onychomykosen verschlimmert werden. In dieser Studie wurde der Frage nachgegangen, ob die heute üblichen Faserzusammensetzungen von Strümpfen Einfluss auf das Wachstum der humanpathogenen Hautpilze Trichophyton rubrum, Trichophyton mentagrophytes und Candida albicans...
Article
Sie sind relativ selten, aber wenn sie auftreten, manifestieren sie sich oft auch am Genitale: die blasenbildenden Erkrankungen der Pemphigus-Gruppe und das bullöse Pemphigoid. Um den Patienten diagnostische Irrfahrten zu ersparen, sollten Sie sie erkennen.
Article
Genitale Dermatosen beim Mann beruhen oft auf allgemeinen Erkrankungen, die mit einer spezifischen genitalen Symptomatik in Erscheinung treten oder im Rahmen einer (Haut-)Erkrankung Symptome am Genitale aufweisen. So unterschiedlich die zugrunde liegenden Ursachen sind, so verschieden stellen sie sich klinisch dar.
Article
Zusammenfassung: Eine Untersuchung der öffentlichen schwimmbäder und Saxmen Marburgs wurde unter mykologischen, epidemiologisrhen uud hygienischen Gesichtspunkten durch-geführt. Von 416 Abklatschproben waren 187 (-45 %) pilzpositiv; es den 22mpl Dermatophyten (5,3%), 79mal Hefen (19 %) und 137mal Schimmel (32,9 %) kulturell isoliert. Somit konnte e...