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Nunes da Silva A, Araújo THA, Boa-Sorte N, Farias G, Galvão-Barroso AK, de Carvalho A, Vicente AC, Galvão-Castro B, Rios Grassi MF. Epidemiological and molecular evidence of intrafamilial transmission through sexual and vertical routes in Bahia, the state with the highest prevalence of HTLV-1 in Brazil. PLoS Negl Trop Dis 2023; 17:e0011005. [PMID: 37769013 PMCID: PMC10593241 DOI: 10.1371/journal.pntd.0011005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 10/23/2023] [Accepted: 09/19/2023] [Indexed: 09/30/2023] Open
Abstract
INTRODUCTION Familial clustering of HTLV-1 and related diseases has been reported in Brazil. However, intrafamilial transmission of HTLV-1 based on molecular analysis has been studied only in a few communities of Japanese immigrants and African-Brazilians. OBJECTIVE To investigate the familial clustering of HTLV-1 infection and to determine the likely routes of transmission through epidemiological and genetic analyzes. METHODS Medical records of 1,759 HTLV-1+ patients from de the Center for HTLV in Salvador, Brazil, were evaluated to identify first-degree relatives previously tested for HTLV-1. Familial clustering was assumed if more than one member of the same family was HTLV-1+. LTR regions of HTLV-1 sequences were analyzed for the presence of intrafamilial polymorphisms. Family pedigrees were constructed and analyzed to infer the likely transmission routes of HTLV-1. RESULTS In 154 patients at least one other family member had tested positive for HTLV-1 (a total of 182 first-degree relatives). Of the 91 couples (182 individuals), 51.6% were breastfed, and 67.4% reported never using a condom. Of the 42 mother-child pairs, 23.8% had a child aged 13 years or younger; all mothers reported breastfeeding their babies. Pedigrees of families with 4 or more members suggests that vertical transmission is a likely mode of transmission in three families. Three families may have had both vertical and sexual transmission routes for HTLV-1. The genetic signatures of the LTR region of 8 families revealed 3 families with evidence of vertical transmission, another 3 families (spouses) with sexual transmission, and one family with both transmission routes. HTLV-1 sequences belonged to Cosmopolitan subtype HTLV-1a Transcontinental subgroup A. CONCLUSION Sexual and vertical transmission routes contribute to the intrafamilial spread of HTLV-1 in the state of Bahia.
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Affiliation(s)
| | | | - Ney Boa-Sorte
- Escola Bahiana de Medicina e Saúde Pública, Salvador, Brasil
| | - Giovanne Farias
- Escola Bahiana de Medicina e Saúde Pública, Salvador, Brasil
| | | | | | | | - Bernardo Galvão-Castro
- Escola Bahiana de Medicina e Saúde Pública, Salvador, Brasil
- Laboratório Avançado de Saúde Pública, Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Salvador, Brasil
| | - Maria Fernanda Rios Grassi
- Escola Bahiana de Medicina e Saúde Pública, Salvador, Brasil
- Laboratório Avançado de Saúde Pública, Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Salvador, Brasil
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Vallinoto ACR, Rosadas C, Machado LFA, Taylor GP, Ishak R. HTLV: It Is Time to Reach a Consensus on Its Nomenclature. Front Microbiol 2022; 13:896224. [PMID: 35531274 PMCID: PMC9072825 DOI: 10.3389/fmicb.2022.896224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 03/30/2022] [Indexed: 11/24/2022] Open
Affiliation(s)
- Antonio Carlos Rosário Vallinoto
- Laboratório de Virologia do Instituto de Ciências Biológicas da Universidade Federal do Pará, Belém, Brazil
- *Correspondence: Antonio Carlos Rosário Vallinoto
| | - Carolina Rosadas
- Section of Virology, Department of Infectious Disease, Imperial College London, London, United Kingdom
| | | | - Graham P. Taylor
- Section of Virology, Department of Infectious Disease, Imperial College London, London, United Kingdom
| | - Ricardo Ishak
- Section of Virology, Department of Infectious Disease, Imperial College London, London, United Kingdom
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Early-Onset HTLV-1-Associated Myelopathy/Tropical Spastic Paraparesis. Pathogens 2020; 9:pathogens9060450. [PMID: 32517313 PMCID: PMC7350296 DOI: 10.3390/pathogens9060450] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 06/01/2020] [Accepted: 06/05/2020] [Indexed: 12/14/2022] Open
Abstract
Background: Vertical transmission of HTLV-1 could lead to the early development of HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP). This significantly affects quality of life and increases morbimortality. Objective: To describe the epidemiological and clinical characteristics of patients with early-onset HAM/TSP, defined as disease onset before 20 years of age. Methods: This is a retrospective study from an HTLV-1 clinical cohort between 1989 and 2019. We searched for medical records of patients with (1) diagnosis of HTLV-1 infection using two ELISA and/or one Western blot, (2) clinical diagnosis of HAM/TSP by neurological assessment, and (3) HAM/TSP symptom-onset before 20 years of age. Results: A total of 38 cases were identified in the cohort; 25 were female (66%). The median age of onset was 14 years old. 31 (82%) cases had HTLV-1 testing done among family members; 22 out of 25 tested mothers (88%) were HTLV-1 positive. Most patients (27/34) were breastfed for more than one year. Disease progression measured through EDSS and IPEC-1 showed an upward trend towards worsening spasticity with 18 patients (47%) eventually requiring mobility aids. Conclusions: Cases of early-onset HAM/TSP are not of rare occurrence, which translates into many more years of dependency, the use of mobility aids, and increased overall morbidity.
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Clinicopathological aspects and proviral load of adulthood infective dermatitis associated with HTLV-1: Comparison between juvenile and adulthood forms. PLoS Negl Trop Dis 2020; 14:e0008241. [PMID: 32330142 PMCID: PMC7202657 DOI: 10.1371/journal.pntd.0008241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 05/06/2020] [Accepted: 03/22/2020] [Indexed: 11/28/2022] Open
Abstract
Background Infective dermatitis associated with human T-cell lymphotropic virus type-1 (HTLV-1), (IDH), is a chronic eczema occurring in HTLV-1 infected children. Rare cases of adulthood IDH have been reported and no study until now aimed to compare juvenile and adulthood IDH. Methodology/Principal findings Twelve cases of adulthood IDH followed for a mean time of 7.5 years were analyzed according to clinicopathological and molecular aspects, comparing them to juvenile IDH cases. Diagnosis was based on the modified major criteria used for juvenile IDH. Proviral load (PVL) assessment was performed by real-time PCR technique. Adulthood IDH presented similar clinicopathological and molecular aspects compared to juvenile IDH. The morphology of lesions and areas of involvement were similar, except for the involvement of the ankles and inframammary folds in the adulthood form. HTLV-1 associated myelopathy/tropical spastic paraparesis (HAM/TSP) occurred in six adulthood IDH patients, with almost equal frequency. However, at least in two patients, HAM/TSP appeared prior to IDH, differently from what was observed in juvenile IDH. Conclusions/Significance Adulthood IDH is similar to juvenile IDH according to clinicopathological aspects and PVL levels. Therefore, the same modified major diagnostic criteria for juvenile IDH can be applied to both forms. HTLV-1 infection is most prevalent in developing countries, and in Brazil, it is most prevalent in poor black communities. The majority of infected people are asymptomatic, but a minority can develop adult T-cell leukemia/lymphoma, HTLV-1 associated myelopathy/tropical spastic paraparesis (HAM/TSP) and/or infective dermatitis associated with HTLV-1 (IDH), the subject of this study. IDH is an exudative chronic eczema that always involves the scalp and retroauricular regions and is characterized by its prompt response to antimicrobial therapy. First described in Jamaican children in the sixties, only in 2001 adulthood onset of IDH was reported, and since then little literature has been produced concerning it. Thus, we aimed to provide a thorough description of this relatively new subtype of IDH, investigating its clinical, pathological and molecular aspects, comparing them to juvenile IDH. Apart from minor differences, such as involvement of extra body sites and earlier onset of HAM/TSP, adulthood IDH is very similar to its juvenile counterpart, and the same diagnostic criteria can be applied to both.
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Varandas CMN, da Silva JLS, Primo JRL, de Oliveira MDFSP, Moreno-Carvalho O, Farre L, Bittencourt AL. Early Juvenile Human T-cell Lymphotropic Virus Type-1-Associated Myelopathy/Tropical Spastic Paraparesis: Study of 25 Patients. Clin Infect Dis 2019; 67:1427-1433. [PMID: 29912303 DOI: 10.1093/cid/ciy289] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 04/16/2018] [Indexed: 12/14/2022] Open
Abstract
Background Human T-cell lymphotropic virus type-1 (HTLV-1) may cause severe diseases such as HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP) and infective dermatitis associated with HTLV-1 (IDH). The clinical characteristics and progression of 25 early onset HAM/TSP associated or not to IDH were described. Methods Following-up 37 IDH patients with neurological examinations, 54% developed HAM/TSP. To these cases were added 5 cases of juvenile HAM/TSP. The patients were HTLV-1+ and were submitted to dermatological and neurological examinations. Diagnosis of HAM/TSP was performed according to Osame et al (1990) and Castro-Costa et al (2006) criteria. Results Twenty-one patients were classified as definite HAM/TSP by both criteria, 3 as probable HAM/TSP by Osame et al, and another as probable HAM/TSP according to Castro-Costa et al Median age at onset of neurological manifestations was 9 years for the IDH/HAM/TSP group and 16 years for the HAM/TSP group (P = .045). In 12 patients, the onset of neurological manifestations occurred when they were less than 10 years of age. In the group IDH/HAM/TSP, the neurological symptoms always begun during the period of activity of IDH. The progression of HAM/TSP evaluated in 17 cases was heterogeneous, and 3 had rapid progressive course. Conclusions The juvenile HAM/TSP may occur very early and also presents marked female predominance. Progression of IDH to HAM/TSP before 19 years of age is frequent (54%). Rapid progressive form may also occur in early HAM/TSP. As juvenile IDH and HAM/TSP are due to vertical transmission through breastfeeding, it is very important to avoid this pathway of infection.
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Affiliation(s)
| | | | - Janeusa Rita L Primo
- Pediatric Neurology Unit, Hospital Santo Antonio das Obras Sociais Irmã Dulce, Salvador.,Department of Internal Medicine, Professor Edgard Santos Teaching Hospital, Federal University of Bahia
| | | | - Otávio Moreno-Carvalho
- Department of Internal Medicine, Professor Edgard Santos Teaching Hospital, Federal University of Bahia
| | - Lourdes Farre
- Laboratory of Experimental Pathology, Gonçalo Muniz Institute, Oswaldo Cruz Foundation, Salvador, Bahia, Brazil.,Program Against Cancer Therapeutic Resistance (ProCURE), Catalan Institute of Oncology (ICO), Bellvitge Institute for Biomedical Research (IDIBELL), L'Hospitalet del Llobregat, Catalonia, Spain
| | - Achiléa L Bittencourt
- Department of Pathology, Professor Edgard Santos Teaching Hospital, Federal University of Bahia
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Rosadas C, Taylor GP. Mother-to-Child HTLV-1 Transmission: Unmet Research Needs. Front Microbiol 2019; 10:999. [PMID: 31134031 PMCID: PMC6517543 DOI: 10.3389/fmicb.2019.00999] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 04/18/2019] [Indexed: 02/04/2023] Open
Abstract
Mother-to-child transmission (MTCT) of Human T-cell lymphotropic virus type 1 (HTLV-1) causes lifelong infection. At least 5–10 million individuals worldwide are currently living with HTLV-1. Studies of regional variation are required to better understand the contribution of MTCT to the global burden of infection. Although most infected individuals remain asymptomatic ∼10% develop high morbidity, high mortality disease. Infection early in life is associated with a higher risk of disease development. Adult T-cell leukemia (ATL), which is caused by HTLV-1 and has a median survival of 8 months is linked to MTCT, indeed evidence of ATL following infection as an adult is sparse. Infective dermatitis also only occurs following neonatal infection. Whilst HTLV-1-associated myelopathy (HAM) follows sexual and iatrogenic infection approximately 30% of patients presenting with HAM/TSP acquired the infection through their mothers. HAM/TSP is a disabling neurodegenerative disease that greatly impact patient’s quality of life. To date there is no cure for HTLV-1 infection other than bone marrow transplantation for ATL nor any measure to prevent HTLV-1 associated diseases in an infected individual. In this context, prevention of MTCT is expected to contribute disproportionately to reducing both the incidence of HTLV-1 and the burden of HTLV-1 associated diseases. In order to successfully avoid HTLV-1 MTCT, it is important to understand all the variables involved in this route of infection. Questions remain regarding frequency and risk factors for in utero peri-partum transmission whilst little is known about the efficacy of pre-labor cesarean section to reduce these infections. Understanding the contribution of peripartum infection to the burden of disease will be important to gauge the risk-benefit of interventions in this area. Few studies have examined the impact of HTLV-1 infection on fertility or pregnancy outcomes nor the susceptibility of the mother to infection during pregnancy and lactation. Whilst breast-feeding is strongly associated with transmission and avoidance of breast-feeding a proven intervention little is known about the mechanism of transmission from the breast milk to the infant and there have been no clinical trials of antiretroviral therapy (ARV) to prevent this route of transmission.
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Affiliation(s)
- Carolina Rosadas
- Retrovirology and GU Medicine, Department of Medicine, Imperial College London, London, United Kingdom
| | - Graham P Taylor
- Retrovirology and GU Medicine, Department of Medicine, Imperial College London, London, United Kingdom
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Oliveira PD, Kachimarek AC, Bittencourt AL. Early Onset of HTLV-1 Associated Myelopathy/Tropical Spastic Paraparesis (HAM/TSP) and Adult T-cell Leukemia/Lymphoma (ATL): Systematic Search and Review. J Trop Pediatr 2018; 64:151-161. [PMID: 28582585 DOI: 10.1093/tropej/fmx039] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Human T-cell lymphotropic virus type 1 (HTLV-1) is endemic in some regions and its vertical transmission occurs mainly through breastfeeding. About 10% of carriers develop associated diseases including HTLV-1 associated myelopathy/tropical spastic paraparesis (HAM/TSP), adult T-cell leukemia/lymphoma (ATL) and infectious dermatitis associated with HTLV-1 (IDH). We searched for available case reports of early-onset HAM/TSP and ATL to evaluate demographic and disease aspects in infantile-juvenile patients. In the reviewed literature, 27 HAM/TSP and 31 ATL cases were found. In almost all of them, the most likely route of transmission was through breastfeeding. ATL is rarely reported, notwithstanding it may be underestimated because T-cell lymphomas are not investigated for HTLV-1 infection in this age group. IDH was frequently associated with HAM/TSP. The investigation of HTLV-1 infection in pregnant women is an important matter of public health and should be mandatory in endemic countries.
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Affiliation(s)
| | - Amanda C Kachimarek
- Department of Pathology, Complexo Hospitalar Universitário Prof Edgard Santos, Universidade Federal da Bahia, Brazil
| | - Achiléa L Bittencourt
- Department of Pathology, Complexo Hospitalar Universitário Prof Edgard Santos, Universidade Federal da Bahia, Brazil
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Alvarez C, Gotuzzo E, Vandamme AM, Verdonck K. Family Aggregation of Human T-Lymphotropic Virus 1-Associated Diseases: A Systematic Review. Front Microbiol 2016; 7:1674. [PMID: 27840624 PMCID: PMC5083714 DOI: 10.3389/fmicb.2016.01674] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 10/06/2016] [Indexed: 01/09/2023] Open
Abstract
Human T-lymphotropic virus 1 (HTLV-1) is a retrovirus that produces a persistent infection. Two transmission routes (from mother to child and via sexual intercourse) favor familial clustering of HTLV-1. It is yet unknown why most HTLV-1 carriers remain asymptomatic while about 10% of them develop complications. HTLV-1 associated diseases were originally described as sporadic entities, but familial presentations have been reported. To explore what is known about family aggregation of HTLV-1-associated diseases we undertook a systematic review. We aimed at answering whether, when, and where family aggregation of HTLV-1-associated diseases was reported, which relatives were affected and which hypotheses were proposed to explain aggregation. We searched MEDLINE, abstract books of HTLV conferences and reference lists of selected papers. Search terms used referred to HTLV-1 infection, and HTLV-1-associated diseases, and family studies. HTLV-1-associated diseases considered are adult T-cell leukemia/lymphoma (ATLL), HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP), HTLV-1-associated uveitis, and infective dermatitis. Seventy-four records reported HTLV-1-associated diseases in more than one member of the same family and were included. Most reports came from HTLV-1-endemic countries, mainly Japan (n = 30) and Brazil (n = 10). These reports described a total of 270 families in which more than one relative had HTLV-1-associated diseases. In most families, different family members suffered from the same disease (n = 223). The diseases most frequently reported were ATLL (115 families) and HAM/TSP (102 families). Most families (n = 144) included two to four affected individuals. The proportion of ATLL patients with family history of ATLL ranged from 2 to 26%. The proportion of HAM/TSP patients with family history of HAM/TSP ranged from 1 to 48%. The predominant cluster types for ATLL were clusters of siblings and parent-child pairs and for HAM/TSP, an affected parent with one or more affected children. The evidence in the literature, although weak, does suggest that HTLV-1-associated diseases sometimes cluster in families. Whether familial transmission of HTLV-1 is the only determining factor, or whether other factors are also involved, needs further research.
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Affiliation(s)
- Carolina Alvarez
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano HerediaLima, Peru; Department of Microbiology and Immunology, Clinical and Epidemiological Virology, Rega Institute for Medical Research, KU Leuven-University of LeuvenLeuven, Belgium
| | - Eduardo Gotuzzo
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano HerediaLima, Peru; Departamento de Enfermedades Infecciosas, Tropicales y Dermatológicas, Hospital Cayetano HerediaLima, Peru
| | - Anne-Mieke Vandamme
- Department of Microbiology and Immunology, Clinical and Epidemiological Virology, Rega Institute for Medical Research, KU Leuven-University of LeuvenLeuven, Belgium; Center for Global Health and Tropical Medicine, Unidade de Microbiologia, Instituto de Higiene e Medicina Tropical, Universidade Nova de LisboaLisbon, Portugal
| | - Kristien Verdonck
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano HerediaLima, Peru; Department of Public Health, Institute of Tropical Medicine AntwerpAntwerp, Belgium
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Tokura Y, Ito T, Kawakami C, Sugita K, Kasuya A, Tatsuno K, Sawada Y, Nakamura M, Shimauchi T. Human T-lymphotropic virus 1 (HTLV-1)-associated lichenoid dermatitis induced by CD8+T cells in HTLV-1 carrier, HTLV-1-associated myelopathy/tropical spastic paraparesis and adult T-cell leukemia/lymphoma. J Dermatol 2015; 42:967-74. [DOI: 10.1111/1346-8138.12980] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2015] [Accepted: 05/01/2015] [Indexed: 11/29/2022]
Affiliation(s)
- Yoshiki Tokura
- Department of Dermatology; Hamamatsu University School of Medicine; Hamamatsu Japan
| | - Taisuke Ito
- Department of Dermatology; Hamamatsu University School of Medicine; Hamamatsu Japan
| | - Chika Kawakami
- Department of Dermatology; University of Occupational and Environmental Health; Kitakyushu Japan
| | - Kazunari Sugita
- Department of Dermatology; University of Occupational and Environmental Health; Kitakyushu Japan
| | - Akira Kasuya
- Department of Dermatology; Hamamatsu University School of Medicine; Hamamatsu Japan
| | - Kazuki Tatsuno
- Department of Dermatology; Hamamatsu University School of Medicine; Hamamatsu Japan
| | - Yu Sawada
- Department of Dermatology; University of Occupational and Environmental Health; Kitakyushu Japan
| | - Motonobu Nakamura
- Department of Dermatology; University of Occupational and Environmental Health; Kitakyushu Japan
| | - Takatoshi Shimauchi
- Department of Dermatology and Wound Healing; School of Medicine; Cardiff University; Cardiff UK
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Tokura Y, Sawada Y, Shimauchi T. Skin manifestations of adult T-cell leukemia/lymphoma: clinical, cytological and immunological features. J Dermatol 2015; 41:19-25. [PMID: 24438140 DOI: 10.1111/1346-8138.12328] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Accepted: 09/27/2013] [Indexed: 12/12/2022]
Abstract
Adult T-cell leukemia/lymphoma (ATLL) is a malignancy of mature T cells caused by human T-cell leukemia virus type I. The endemic areas include Japan, especially in Kyushu, the Caribbean, Papua New Guinea, South America and Africa. Approximately 50% of ATLL patients exhibit skin manifestations. Cytologically, ATLL tumor cells are characterized by CD4(+) CD25(+) regulatory T-cell phenotype, high expressions of CCR4, and programmed cell death (PD)-1 and PD-ligand 1. The skin eruptions are categorized into six types: patch, plaque, multipapular, nodulotumoral, erythrodermic and purpuric. The overall survival of the eruption-bearing patients was poorer than that of the non-eruption-bearing patients in acute, chronic and smoldering types, but the survival levels of both groups were comparable in lymphoma type. The prognosis was poor in the order of: erythrodermic, nodulotumoral, multipapular/purpuric, plaque, then patch. Multivariate analysis revealed that the eruption type is an independent prognostic factor for ATLL. Patients may have other skin manifestations, secondary and infective lesions.
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Affiliation(s)
- Yoshiki Tokura
- Department of Dermatology, Hamamatsu University School of Medicine, Hamamatsu, Japan
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