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  1. Article: Thalidomide as an effective treatment for adult multiple xanthogranuloma.

    Debois, Deborah / Marot, Liliane / Andre, Marc / Dachelet, Claire

    JAAD case reports

    2018  Volume 4, Issue 9, Page(s) 896–898

    Language English
    Publishing date 2018-10-03
    Publishing country United States
    Document type Case Reports
    ZDB-ID 2834220-3
    ISSN 2352-5126
    ISSN 2352-5126
    DOI 10.1016/j.jdcr.2018.05.005
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Linear IgA dermatosis in association with angioimmunoblastic T-cell lymphoma infiltrating the skin: A case report with literature review.

    Colmant, Caroline / Camboni, Alessandra / Dekeuleneer, Valérie / Marot, Liliane / Dachelet, Claire / Baeck, Marie

    Journal of cutaneous pathology

    2019  Volume 47, Issue 3, Page(s) 251–256

    Abstract: Angioimmunoblastic T-cell lymphoma (AITL) is an aggressive form of peripheral T-cell lymphoma, characterized by systemic symptoms, diffuse lymphadenopathy, hepatosplenomegaly and immunodysregulation. Half of AITL is associated with cutaneous symptoms, ... ...

    Abstract Angioimmunoblastic T-cell lymphoma (AITL) is an aggressive form of peripheral T-cell lymphoma, characterized by systemic symptoms, diffuse lymphadenopathy, hepatosplenomegaly and immunodysregulation. Half of AITL is associated with cutaneous symptoms, but only few cases with bullous eruption have been described. Association with a linear IgA dermatosis is extremely rare. Linear IgA dermatosis can be idiopathic, or linked with drug intake or neoplastic disorders. Some cases of linear IgA dermatosis presenting as toxic epidermal necrolysis (TEN) have been described, most of them being drug induced. We here present the case of a 72-year-old man recently diagnosed with AITL who developed a bullous eruption, presenting as TEN. Histopathology showed deep cutaneous involvement of the lymphoma with a sub-epidermal blistering and direct immunofluorescence revealed a heavy IgA linear deposit on the dermal-epidermal junction. A diagnosis of linear IgA dermatosis associated with cutaneous involvement of an angioimmunoblastic T-cell lymphoma was made. Chemotherapy and corticosteroids allowed cutaneous improvement but the patient died of his lymphoma shortly after.
    MeSH term(s) Aged ; Humans ; Linear IgA Bullous Dermatosis/etiology ; Linear IgA Bullous Dermatosis/pathology ; Lymphoma, T-Cell, Peripheral/complications ; Lymphoma, T-Cell, Peripheral/pathology ; Male
    Language English
    Publishing date 2019-10-27
    Publishing country United States
    Document type Case Reports ; Journal Article ; Review
    ZDB-ID 187078-6
    ISSN 1600-0560 ; 0303-6987
    ISSN (online) 1600-0560
    ISSN 0303-6987
    DOI 10.1111/cup.13576
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: CD30+ Cutaneous Anaplastic Large-Cell Lymphoma of the Upper Eyelid: A Case Report.

    Olivier, Stéphanie / Dachelet, Claire / Theate, Ivan / Tromme, Isabelle / Baeck, Marie

    Case reports in dermatology

    2017  Volume 9, Issue 3, Page(s) 206–210

    Abstract: CD30+ cutaneous anaplastic large-cell lymphoma is part of the CD30+ T-cell lymphoproliferative disorders. This type of lymphoma is in most cases indolent, with a high survival rate. We report the case of a 59-year-old patient with a 1-month lasting ... ...

    Abstract CD30+ cutaneous anaplastic large-cell lymphoma is part of the CD30+ T-cell lymphoproliferative disorders. This type of lymphoma is in most cases indolent, with a high survival rate. We report the case of a 59-year-old patient with a 1-month lasting crusty lesion of the upper eyelid. Eyelid involvement is very uncommon, as the most frequent locations are the trunk and the limbs.
    Language English
    Publishing date 2017-10-20
    Publishing country Switzerland
    Document type Case Reports
    ZDB-ID 2505300-0
    ISSN 1662-6567
    ISSN 1662-6567
    DOI 10.1159/000481771
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Chilblains observed during the COVID-19 pandemic cannot be distinguished from classic, cold-related chilblains

    De Greef, Axel / Choteau, Mathilde / Herman, Anne / Bouzin, Caroline / Marot, Liliane / Dachelet, Claire / Lelotte, Julie / Hoton, Delphine / Dumoutier, Laure / Baeck, Marie

    European journal of dermatology : EJD

    2022  Volume 32, Issue 3, Page(s) 377–383

    Abstract: Background: Type 1 interferon (IFN-I) response induced by SARS-CoV-2 has been hypothesized to explain the association between chilblain lesions (CL) and SARS-CoV-2 infection.: Objective: To explore direct cytopathogenicity of SARS-CoV-2 in CL and to ... ...

    Title translation Chilblains observed during the COVID-19 pandemic cannot be distinguished from classic, cold-related chilblains.
    Abstract Background: Type 1 interferon (IFN-I) response induced by SARS-CoV-2 has been hypothesized to explain the association between chilblain lesions (CL) and SARS-CoV-2 infection.
    Objective: To explore direct cytopathogenicity of SARS-CoV-2 in CL and to focus on IFN-I expression in patients with chilblains.
    Materials & methods: A monocentric cohort of 43 patients presenting with CL from April 2020 to May 2021 were included. During this period, all CL were, a priori, considered to be SARS-CoV-2-related. RT-qPCR on nasopharyngeal swabs and measurements of anti-SARS-CoV-2 antibodies were performed. Anti-SARS-CoV-2 immunostainings as well as SARS-CoV-2 RT-qPCR were performed on biopsy specimens of CL and controls. Expression of MX1 and IRF7 was analysed on patients’ biopsy specimens and/or PBMC and compared with controls and/or chilblains observed before the pandemic. Serum IFN-α was also measured.
    Results: RT-qPCR was negative in all patients and serological tests were positive in 11 patients. Immunostaining targeting viral proteins confirmed the lack of specificity. SARS-CoV-2 RNA remained undetected in all CL specimens. MX1 immunostaining was positive in CL and in pre-pandemic chilblains compared to controls. MX1 and IRF7 expression was significantly increased in CL specimens but not in PBMC. Serum IFN-α was undetected in CL patients.
    Conclusion: CL observed during the pandemic do not appear to be directly related to SARS-CoV-2 infection, either based on viral cytopathogenicity or high IFN-I response induced by the virus.
    MeSH term(s) COVID-19/complications ; Chilblains/diagnosis ; Humans ; Interferon Regulatory Factor-7 ; Interferon-alpha ; Leukocytes, Mononuclear/immunology ; Myxovirus Resistance Proteins ; Pandemics ; RNA, Viral ; SARS-CoV-2
    Chemical Substances IRF7 protein, human ; Interferon Regulatory Factor-7 ; Interferon-alpha ; MX1 protein, human ; Myxovirus Resistance Proteins ; RNA, Viral
    Language English
    Publishing date 2022-09-05
    Publishing country France
    Document type Journal Article
    ZDB-ID 1128666-0
    ISSN 1952-4013 ; 1167-1122
    ISSN (online) 1952-4013
    ISSN 1167-1122
    DOI 10.1684/ejd.2022.4260
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Evaluation of Chilblains as a Manifestation of the COVID-19 Pandemic.

    Herman, Anne / Peeters, Caroline / Verroken, Alexia / Tromme, Isabelle / Tennstedt, Dominique / Marot, Liliane / Dachelet, Claire / Gruson, Damien / Hermans, Cedric / Baeck, Marie

    JAMA dermatology

    2020  Volume 156, Issue 9, Page(s) 998–1003

    Abstract: Importance: During the coronavirus disease 2019 (COVID-19) pandemic, several cases of chilblains have been reported.: Objective: To determine if chilblains are associated with COVID-19.: Design, setting, and participants: This monocentric case ... ...

    Abstract Importance: During the coronavirus disease 2019 (COVID-19) pandemic, several cases of chilblains have been reported.
    Objective: To determine if chilblains are associated with COVID-19.
    Design, setting, and participants: This monocentric case series was conducted at the Department of Dermatology at Cliniques universitaires Saint-Luc, a tertiary care hospital in Brussels, Belgium, between April 10 and April 17, 2020. We evaluated a total of 31 referred patients who had recently developed chilblains.
    Main outcomes and measures: Real-time reverse transcriptase-polymerase chain reaction (RT-PCR) was used to detect severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) RNA on nasopharyngeal swabs for all patients and in skin biopsy specimens for 22 patients. Blood samples from all patients were tested for specific anti-SARS-CoV-2 immunoglobulin (Ig) M and IgG antibodies. All patients had extended blood analyses. Histologic (22 patients) and immunofluorescence examinations (15 patients) were performed on the skin biopsy specimens.
    Results: The 31 patients were generally in good health; most were teenagers or young adults, and 19 were women. Histopathologic analysis of skin biopsy specimens (22 patients) confirmed the diagnosis of chilblains and showed occasional lymphocytic or microthrombotic phenomena. Immunofluorescence analyses showed vasculitis of small-diameter vessels in 7 patients. In all patients, SARS-CoV-2 RNA remained undetected by RT-PCR on nasopharyngeal swabs and in biopsy samples of the skin lesions. The IgM and IgG antibody titers were negative for SARS-CoV-2 in all patients (<1.0 arbitrary unit/mL). No significant abnormalities in blood test results were suggestive of systemic disease. Antinuclear antibody titers were low in 7 patients and higher in 1 patient.
    Conclusions and relevance: Chilblains appeared not to be directly associated with COVID-19 in this case series. Lifestyle changes associated with community containment and lockdown measures are a possible explanation for these lesions.
    MeSH term(s) Adolescent ; Adult ; Aged ; Belgium/epidemiology ; Biopsy ; COVID-19 ; COVID-19 Testing ; COVID-19 Vaccines ; Chilblains/diagnosis ; Chilblains/etiology ; Child ; Clinical Laboratory Techniques ; Coronavirus Infections/diagnosis ; Coronavirus Infections/epidemiology ; Female ; Humans ; Male ; Middle Aged ; Pandemics ; Pneumonia, Viral/diagnosis ; Pneumonia, Viral/epidemiology ; Real-Time Polymerase Chain Reaction ; Young Adult
    Chemical Substances COVID-19 Vaccines ; Covid-19 aAPC vaccine
    Keywords covid19
    Language English
    Publishing date 2020-06-25
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2701761-8
    ISSN 2168-6084 ; 2168-6068
    ISSN (online) 2168-6084
    ISSN 2168-6068
    DOI 10.1001/jamadermatol.2020.2368
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Primary cutaneous CD8+ and CD30+ T-cell lymphoproliferative disorders: case reports and clinical implications.

    Baldin, Pamela / Shwe, Myat Marla / Marot, Liliane / Eeckout, Pascal Van Van / Dachelet, Claire / Sacré, Laurine / Berners, Aline / Olivier, Stephanie / Camboni, Alessandra

    European journal of dermatology : EJD

    2019  Volume 29, Issue 1, Page(s) 39–44

    Abstract: Background: CD8+ CD30+ primary cutaneous T-cell lymphomas (PCTCL) are rare entities with overlapping pathological features and variable outcome.: Objectives: We sought to highlight the importance of correlation between pathological findings and ... ...

    Abstract Background: CD8+ CD30+ primary cutaneous T-cell lymphomas (PCTCL) are rare entities with overlapping pathological features and variable outcome.
    Objectives: We sought to highlight the importance of correlation between pathological findings and clinical presentation for correct classification of the disease.
    Materials & methods: Two cases of CD8+ CD30+ PCTCL were investigated. The first patient presented with a multiple necro-erythematous lesion of the limb and the second with a papulo-necrotic lesion of the eyelid.
    Results: Despite a different clinical presentation, pathological findings were similar in both cases. Clinico-pathological correlation led to a diagnosis of primary cutaneous CD8+ aggressive epidermotropic cytotoxic T-cell lymphoma in the first case and primary cutaneous anaplastic large-cell lymphoma in the second. The first patient died shortly after diagnosis and the second is alive without recurrence.
    Conclusions: Clinico-pathological correlation is essential for the correct identification of these rare diseases.
    MeSH term(s) Aged ; CD8 Antigens/immunology ; Fatal Outcome ; Female ; Humans ; Ki-1 Antigen/immunology ; Lymphoma/immunology ; Lymphoma/pathology ; Lymphoproliferative Disorders/immunology ; Lymphoproliferative Disorders/pathology ; Middle Aged ; Prognosis ; Skin Neoplasms/immunology ; Skin Neoplasms/pathology
    Chemical Substances CD8 Antigens ; Ki-1 Antigen
    Language English
    Publishing date 2019-01-19
    Publishing country France
    Document type Case Reports ; Journal Article
    ZDB-ID 1128666-0
    ISSN 1952-4013 ; 1167-1122
    ISSN (online) 1952-4013
    ISSN 1167-1122
    DOI 10.1684/ejd.2018.3493
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: CD30+ Cutaneous Anaplastic Large-Cell Lymphoma of the Upper Eyelid: A Case Report

    Olivier, Stéphanie / Dachelet, Claire / Theate, Ivan / Tromme, Isabelle / Baeck, Marie

    Case Reports in Dermatology

    2017  Volume 9, Issue 3, Page(s) 206–210

    Abstract: CD30+ cutaneous anaplastic large-cell lymphoma is part of the CD30+ T-cell lymphoproliferative disorders. This type of lymphoma is in most cases indolent, with a high survival rate. We report the case of a 59-year-old patient with a 1-month lasting ... ...

    Institution Department of Dermatology, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Brussels, Belgium
    Department of Dermatology, CHU UCL Namur, Yvoir, Belgium
    Department of Pathology, Institut de Pathologie et de Génétique (IPG), Gosselies, Belgium
    Abstract CD30+ cutaneous anaplastic large-cell lymphoma is part of the CD30+ T-cell lymphoproliferative disorders. This type of lymphoma is in most cases indolent, with a high survival rate. We report the case of a 59-year-old patient with a 1-month lasting crusty lesion of the upper eyelid. Eyelid involvement is very uncommon, as the most frequent locations are the trunk and the limbs.
    Keywords T-cell lymphoma ; Lymphoma ; CD30+ cutaneous anaplastic large-cell lymphoma ; Eyelid
    Language English
    Publishing date 2017-10-20
    Publisher S. Karger AG
    Publishing place Basel, Switzerland
    Document type Article
    Note Single Case ; This article is licensed under the Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC).
    ZDB-ID 2505300-0
    ISSN 1662-6567 ; 1662-6567
    ISSN (online) 1662-6567
    ISSN 1662-6567
    DOI 10.1159/000481771
    Database Karger publisher's database

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  8. Article: Evaluation of Chilblains as a Manifestation of the COVID-19 Pandemic

    Herman, Anne / Peeters, Caroline / Verroken, Alexia / Tromme, Isabelle / Tennstedt, Dominique / Marot, Liliane / Dachelet, Claire / Gruson, Damien / Hermans, Cedric / Baeck, Marie

    JAMA dermatol. (Chic. Ill., Print)

    Abstract: Importance: During the coronavirus disease 2019 (COVID-19) pandemic, several cases of chilblains have been reported. Objective: To determine if chilblains are associated with COVID-19. Design, Setting, and Participants: This monocentric case series was ... ...

    Abstract Importance: During the coronavirus disease 2019 (COVID-19) pandemic, several cases of chilblains have been reported. Objective: To determine if chilblains are associated with COVID-19. Design, Setting, and Participants: This monocentric case series was conducted at the Department of Dermatology at Cliniques universitaires Saint-Luc, a tertiary care hospital in Brussels, Belgium, between April 10 and April 17, 2020. We evaluated a total of 31 referred patients who had recently developed chilblains. Main Outcomes and Measures: Real-time reverse transcriptase-polymerase chain reaction (RT-PCR) was used to detect severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) RNA on nasopharyngeal swabs for all patients and in skin biopsy specimens for 22 patients. Blood samples from all patients were tested for specific anti-SARS-CoV-2 immunoglobulin (Ig) M and IgG antibodies. All patients had extended blood analyses. Histologic (22 patients) and immunofluorescence examinations (15 patients) were performed on the skin biopsy specimens. Results: The 31 patients were generally in good health; most were teenagers or young adults, and 19 were women. Histopathologic analysis of skin biopsy specimens (22 patients) confirmed the diagnosis of chilblains and showed occasional lymphocytic or microthrombotic phenomena. Immunofluorescence analyses showed vasculitis of small-diameter vessels in 7 patients. In all patients, SARS-CoV-2 RNA remained undetected by RT-PCR on nasopharyngeal swabs and in biopsy samples of the skin lesions. The IgM and IgG antibody titers were negative for SARS-CoV-2 in all patients (<1.0 arbitrary unit/mL). No significant abnormalities in blood test results were suggestive of systemic disease. Antinuclear antibody titers were low in 7 patients and higher in 1 patient. Conclusions and Relevance: Chilblains appeared not to be directly associated with COVID-19 in this case series. Lifestyle changes associated with community containment and lockdown measures are a possible explanation for these lesions.
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #32584377
    Database COVID19

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  9. Article ; Online: Evaluation of Chilblains as a Manifestation of the COVID-19 Pandemic.

    Herman, Anne / Peeters, Caroline / Verroken, Alexia / Tromme, Isabelle / Tennstedt, Dominique / Marot, Liliane / Dachelet, Claire / Gruson, Damien / Hermans, Cédric / Baeck, Marie

    JAMA dermatology, Vol. 156, no.9, p. 998-

    2020  Volume 1003

    Abstract: IMPORTANCE: During the coronavirus disease 2019 (COVID-19) pandemic, several cases of chilblains have been reported. OBJECTIVE: To determine if chilblains are associated with COVID-19. DESIGN, SETTING, AND PARTICIPANTS: This monocentric case series was ... ...

    Abstract IMPORTANCE: During the coronavirus disease 2019 (COVID-19) pandemic, several cases of chilblains have been reported. OBJECTIVE: To determine if chilblains are associated with COVID-19. DESIGN, SETTING, AND PARTICIPANTS: This monocentric case series was conducted at the Department of Dermatology at Cliniques universitaires Saint-Luc, a tertiary care hospital in Brussels, Belgium, between April 10 and April 17, 2020. We evaluated a total of 31 referred patients who had recently developed chilblains. MAIN OUTCOMES AND MEASURES: Real-time reverse transcriptase-polymerase chain reaction (RT-PCR) was used to detect severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) RNA on nasopharyngeal swabs for all patients and in skin biopsy specimens for 22 patients. Blood samples from all patients were tested for specific anti-SARS-CoV-2 immunoglobulin (Ig) M and IgG antibodies. All patients had extended blood analyses. Histologic (22 patients) and immunofluorescence examinations (15 patients) were performed on the skin biopsy specimens. RESULTS: The 31 patients were generally in good health; most were teenagers or young adults, and 19 were women. Histopathologic analysis of skin biopsy specimens (22 patients) confirmed the diagnosis of chilblains and showed occasional lymphocytic or microthrombotic phenomena. Immunofluorescence analyses showed vasculitis of small-diameter vessels in 7 patients. In all patients, SARS-CoV-2 RNA remained undetected by RT-PCR on nasopharyngeal swabs and in biopsy samples of the skin lesions. The IgM and IgG antibody titers were negative for SARS-CoV-2 in all patients (<1.0 arbitrary unit/mL). No significant abnormalities in blood test results were suggestive of systemic disease. Antinuclear antibody titers were low in 7 patients and higher in 1 patient. CONCLUSIONS AND RELEVANCE: Chilblains appeared not to be directly associated with COVID-19 in this case series. Lifestyle changes associated with community containment and lockdown measures are a possible explanation for these lesions.
    Keywords covid19
    Subject code 610 ; 616
    Language English
    Publisher American Medical Association
    Publishing country be
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Evaluation of Chilblains as a Manifestation of the COVID-19 Pandemic.

    Herman, Anne / Peeters, Caroline / Verroken, Alexia / Tromme, Isabelle / Tennstedt, Dominique / Marot, Liliane / Dachelet, Claire / Gruson, Damien / Hermans, Cédric / Baeck, Marie

    JAMA dermatology, Vol. 156, no.9, p. 998-

    2020  Volume 1003

    Abstract: IMPORTANCE: During the coronavirus disease 2019 (COVID-19) pandemic, several cases of chilblains have been reported. OBJECTIVE: To determine if chilblains are associated with COVID-19. DESIGN, SETTING, AND PARTICIPANTS: This monocentric case series was ... ...

    Abstract IMPORTANCE: During the coronavirus disease 2019 (COVID-19) pandemic, several cases of chilblains have been reported. OBJECTIVE: To determine if chilblains are associated with COVID-19. DESIGN, SETTING, AND PARTICIPANTS: This monocentric case series was conducted at the Department of Dermatology at Cliniques universitaires Saint-Luc, a tertiary care hospital in Brussels, Belgium, between April 10 and April 17, 2020. We evaluated a total of 31 referred patients who had recently developed chilblains. MAIN OUTCOMES AND MEASURES: Real-time reverse transcriptase-polymerase chain reaction (RT-PCR) was used to detect severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) RNA on nasopharyngeal swabs for all patients and in skin biopsy specimens for 22 patients. Blood samples from all patients were tested for specific anti-SARS-CoV-2 immunoglobulin (Ig) M and IgG antibodies. All patients had extended blood analyses. Histologic (22 patients) and immunofluorescence examinations (15 patients) were performed on the skin biopsy specimens. RESULTS: The 31 patients were generally in good health; most were teenagers or young adults, and 19 were women. Histopathologic analysis of skin biopsy specimens (22 patients) confirmed the diagnosis of chilblains and showed occasional lymphocytic or microthrombotic phenomena. Immunofluorescence analyses showed vasculitis of small-diameter vessels in 7 patients. In all patients, SARS-CoV-2 RNA remained undetected by RT-PCR on nasopharyngeal swabs and in biopsy samples of the skin lesions. The IgM and IgG antibody titers were negative for SARS-CoV-2 in all patients (<1.0 arbitrary unit/mL). No significant abnormalities in blood test results were suggestive of systemic disease. Antinuclear antibody titers were low in 7 patients and higher in 1 patient. CONCLUSIONS AND RELEVANCE: Chilblains appeared not to be directly associated with COVID-19 in this case series. Lifestyle changes associated with community containment and lockdown measures are a possible explanation for these lesions.
    Keywords covid19
    Language English
    Publisher American Medical Association
    Publishing country be
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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