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      Toxic epidermal necrolysis associated with severe cytomegalovirus infection in a patient on regular hemodialysis

      case-report

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          Abstract

          Primary illness with cytomegalovirus leads to latent infection with possible reactivations especially in the immunocompromised patients. Toxic epidermal necrolysis is an immune mediated cytotoxic reaction.

          A fifty years old female diabetic hypertensive patient with end stage renal disease was admitted with fever of unknown origin, constitutional symptoms, vague upper gastrointestinal symptoms and skin rash. Upper gastrointestinal endoscopic biopsy confirmed her diagnosis with cytomegalovirus esophagitis and duodenitis. Cytomegalovirus immunoglobulin M and immunoglobulin G levels were negative but polymerase chain reaction showed fulminant viremia. Biopsy of the skin rash was consistent with toxic epidermal necrolysis. Despite treatment with Ganciclovir, intravenous immunoglobulins, and granulocyte colony stimulating factor the patient’s condition rapidly deteriorated and she died due to multiorgan failure, disseminated intravascular coagulopathy and overwhelming sepsis.

          Probably there is a true association linking toxic epidermal necrolysis to fulminant reactivation of cytomegalovirus. The aim of this anecdote is reporting a newly recognized presentation of cytomegalovirus.

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          Most cited references8

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          Human herpesvirus 6 infection as a risk factor for the development of severe drug-induced hypersensitivity syndrome.

          Drug-induced hypersensitivity syndrome is characterized by a severe, potentially fatal, multiorgan hypersensitivity reaction that usually appears after prolonged exposure to certain drugs. Its delayed onset and clinical resemblance to infectious mononucleosis suggest that underlying viral infections may trigger and activate the disease in susceptible individuals receiving these drugs. A 60-year-old woman developed an itchy, generalized, erythematous, confluent rash on the 39th day of receiving allopurinol therapy. Even after she discontinued treatment with allopurinol, her skin lesions progressed to severe blistering skin eruption. After the patient started oral prednisone therapy, her skin lesions resolved with desquamation. After complete resolution, rechallenge with allopurinol led to the development of an erythematous eruption. Titers of human herpesvirus 6 IgG antibodies dramatically increased with the development of the eruption. The results of a polymerase chain reaction and in situ hybridization indicated the presence of human herpesvirus 6 in the skin lesions, although human herpesvirus 7 DNA was detected only by in situ hybridization. Reactivation of human herpesvirus 6, possibly in concert with human herpesvirus 7, can contribute to the development of a severe drug-induced hypersensitivity syndrome.
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            Apoptosis as a mechanism of keratinocyte death in toxic epidermal necrolysis.

            Toxic epidermal necrolysis (TEN) and Stevens-Johnson syndrome (SJS) are life-threatening diseases characterized by extensive epidermal destruction. The aim of our study was to investigate apoptosis in keratinocytes of patients with TEN and TEN/SJS overlap syndrome. Keratinocytes from TEN patients were found to undergo extensive apoptosis. These results suggest that cell destruction in TEN occurs as a result of apoptosis. Our findings suggest that apoptosis inhibitory agents may play an important part in the therapeutic strategy of TEN.
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              Drug-induced Stevens-Johnson syndrome/toxic epidermal necrolysis.

              Stevens-Johnson syndrome/toxic epidermal necrolysis (SJS/TEN) is a rare (occurring in approximately 2 to 3 people/million population/year in Europe and the US), life-threatening, intolerance reaction of the skin. It is most often caused by drugs (most commonly sulfonamides, nonsteroidal anti-inflammatory drugs, antimalarials, anticonvulsants, and allopurinol). SJS/TEN is characterized by a macular exanthema ('atypical targets') which focusses on the face, neck, and the central trunk regions. Lesions show rapid confluence, a positive Nikolsky's sign, and quickly result in widespread detachment of the epidermis and erosions. Mucosal, conjunctival, and anogenital mucous membranes are prominently involved. Histopathology shows satellite cell necrosis in the early stages progressing to full thickness necrosis of the epidermis, contrasting with rather inconspicuous inflammatory infiltrates of the dermis. Damage to the skin is thought to be mediated by cytotoxic T lymphocytes and mononuclear cells which induce apoptosis in keratinocytes expressing drug-derived antigens at their surfaces. No guidelines for the treatment of SJS/TEN exist since no controlled clinical trials have ever been performed. The controversy over whether systemic corticosteroids should be used to curtail progression is still unresolved; while many authors agree that corticosteroids do in fact suppress progression, it is obvious that they also greatly enhance the risk of infection, the complication which most frequently leads to a fatal outcome. It appears reasonable to only administer corticosteroids in the phase of progression and to withdraw them as soon as possible, and to add antibacterials for prophylaxis. Recently, in a small series of patients, intravenous immunoglobulins were presumed to be effective by the blockade of lytic Fas ligand-mediated apoptosis in SJS/TEN. However, these results have to be confirmed by large clinical trials. Supportive treatment and monitoring of vital functions is of utmost importance in SJS/TEN, and out-patient treatment is unacceptable. Recovery is usually slow, depending on the extent and severity and the presence of complications, and may take 3 to 6 weeks. Skin lesions heal without scars as a rule, but scarring of mucosal sites is a frequent late complication, potentially leading to blindness, obliteration of the fornices and anogenital strictures. There is no reliable laboratory test to determine the offending drug; diagnosis rests on the patient's history and the empirical risk of drugs to elicit skin SJS/TEN. Provocation tests are not indicated since re-exposure is likely to elicit a new episode of SJS/TEN of increased severity.
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                Author and article information

                Journal
                Mediterr J Hematol Infect Dis
                Mediterranean Journal of Hematology and Infectious Diseases
                Mediterranean Journal of Hematology and Infectious Diseases
                Università Cattolica del Sacro Cuore
                2035-3006
                2011
                14 January 2011
                : 3
                : 1
                : e2011004
                Affiliations
                [1 ] MSc in Internal Medicine, Cairo University, Egypt
                [2 ] MSc in Experimental Therapeutics, University of Oxford, United Kingdom
                [3 ] Clinical Fellow in Dermatopathology, The State University of New York, USA
                [4 ] MBChB, DIM, MSc, MRCP(UK), FRCPath, Consultant Hematologist
                Author notes
                Correspondence to: Dina Khalaf, Hematology-Medical Oncology department, Saad Specialist Hospital, Prince Faisal Bin Fahed Street, P.O.Box 30353, AlKhobar, 31952, Saudi Arabia. Telephone number: +96638826666, Ext. 1533, Fax: +9668823334. E-mail address: dgkhalaf@ 123456gmail.com
                Article
                mjhid-3-e2011004
                10.4084/MJHID.2011.004
                3103263
                21625308
                247b45d3-1564-4527-b01c-45b624b029a6

                This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                : 17 November 2010
                : 15 December 2010
                Categories
                Case Report

                Infectious disease & Microbiology
                Infectious disease & Microbiology

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