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1.
Mycoses ; 63(10): 1115-1127, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32757444

RESUMO

OBJECTIVES: We first compare the efficiency of mould/dermatophyte identification by MALDI-TOF MS using a new medium called Id-Fungi plates (IDFP) from Conidia® and two different databases. For the second purpose, we evaluated a new version of the medium supplemented with cycloheximide, Id-Fungi plates Plus (IDFPC) for the direct inoculation of nails, hair and skin samples and compared the efficiency of MALDI-TOF MS identification of dermatophytes to classical methods based on culture and microscopy. METHODS: A total of 71 strains have been cultured IDFP and Sabouraud gentamicin plates (SGC2) and were identified by MALDI-TOF MS. For the evaluation of the combination IDFPC/ MALDI-TOF MS as a method of identification for dermatophytes, 428 samples of hair nails and skin were cultivated in parallel on IDFPC and Sabouraud + cycloheximide medium (SAB-ACTI). RESULTS: For Aspergillus sp and non-Aspergillus moulds, the best performances were obtained on IDFP after maximum 48-h growth, following protein extraction. For dermatophytes, the best condition was using the IDFP at 72 hours, after extended direct deposit. Regarding the direct inoculation of nails, hair skin on IDFPC, 129/428 (30.1%) showed a positive culture against 150/428 (35%) on SAB-ACTI medium. Among the 129 positive strains, the identification by MALDI-TOF MS was correct for 92/129 (71.4%). CONCLUSION: The IDFP allows the generation of better spectra by MALDI-TOF MS compared to SGC2. It facilitates sampling and deposit. Regarding the use of IDFPC, this medium seems less sensitive than SAB-ACTI but among positive strains, the rate of correct identification by MALDI-TOF MS is satisfactory.


Assuntos
Arthrodermataceae/isolamento & purificação , Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz/métodos , Arthrodermataceae/crescimento & desenvolvimento , Ascomicetos/crescimento & desenvolvimento , Ascomicetos/isolamento & purificação , Testes Diagnósticos de Rotina/métodos , Cabelo/microbiologia , Humanos , Técnicas Microbiológicas/métodos , Micoses/diagnóstico , Unhas/microbiologia , Pele/microbiologia , Esporos Fúngicos/isolamento & purificação
2.
Med Mycol ; 57(3): 277-283, 2019 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-29762721

RESUMO

Onychomycosis represents one of the most frequent mycoses in the world. Causative agents are mainly dermatophytes, but yeasts and nondermatophyte moulds can also be involved. Conventional diagnostic methods include direct microscopy (or histology) and culturing. However, molecular methods are becoming increasingly popular in this field. The DermaGenius® (DG) Nail multiplex assay (PathoNostics, The Netherlands) is a new commercial real-time polymerase chain reaction (PCR) kit, which can detect Trichophyton rubrum, Trichophyton interdigitale and Candida albicans directly in nails. The present study is a retrospective evaluation of the kit applied to 138 finger and toenail clippings in comparison to histology and culture methods. The sensitivity and specificity of the PCR assay are 80% (76/95) and 74.4% (32/43), respectively, when histology and culture are used as reference to define onychomycosis. DG performance is not different from histology combined with culture (P = .11) but the best diagnostic efficacy (88.4%, 122/138) is obtained by the combination of histology and DG. In conclusion, this study emphasizes the clinical usefulness of the DG in diagnostics. The high specificity of this test guarantees a better identification compared to culture that can lead to dermatophyte misidentifications. It is a reliable PCR assay that shortens the time to diagnosis and can unmask the presence of nongrowing fungal pathogens in nails.


Assuntos
Arthrodermataceae/isolamento & purificação , Candida albicans/isolamento & purificação , Unhas/microbiologia , Onicomicose/diagnóstico , Reação em Cadeia da Polimerase em Tempo Real/métodos , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Arthrodermataceae/genética , Candida albicans/genética , Criança , DNA Fúngico/genética , Feminino , Técnicas Histológicas , Humanos , Masculino , Pessoa de Meia-Idade , Técnicas de Diagnóstico Molecular/métodos , Técnicas de Tipagem Micológica , Kit de Reagentes para Diagnóstico , Estudos Retrospectivos , Sensibilidade e Especificidade , Trichophyton/genética , Adulto Jovem
3.
Dermatology ; 232(6): 731-737, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-28249285

RESUMO

BACKGROUND: Mycosis fungoides (MF) is the most frequent type of primary cutaneous natural killer and T-cell lymphoma. MF-required immunosuppressive therapies and MF-related immunosuppressive characteristics render patients with MF more prone to infections. AIM: To describe the clinical features of cutaneous infections observed in MF patients. MATERIALS AND METHODS: A series of 56 MF patients were followed prospectively over 3 years and screened for cutaneous infections. TYPE OF STUDY: Prospective observational study. RESULTS: Four herpes simplex virus type-I (HSV-I), 2 staphylococcal (S. aureus) impetiginizations and 2 Malassezia infections were detected in single isolated plaque/patch stage MF as well as 1 varicella zoster virus infection (herpes zoster, HZ) and 2 cases of cellulitis in 10 patients. All patients presented advanced MF. All the diagnoses were delayed due to atypical clinical presentations. CONCLUSIONS: Patients with advanced MF should be particularly monitored for skin infections, especially by HSV and S. aureus. Unexplained exacerbation or the sudden appearance of oozing or ulcerations in MF lesions should initiate a search for viral or bacterial agents. Cellulitis and HZ can be severer and prolonged in MF patients.


Assuntos
Micose Fungoide/complicações , Dermatopatias Infecciosas/microbiologia , Neoplasias Cutâneas/complicações , Adulto , Idoso , Idoso de 80 Anos ou mais , Suscetibilidade a Doenças , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Fatores de Risco , Dermatopatias Infecciosas/etiologia , Adulto Jovem
4.
Case Rep Dermatol ; 11(1): 101-107, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31123453

RESUMO

BRAF inhibitors may present several cutaneous adverse effects, including actinic keratosis, squamous cell carcinoma, keratoacanthoma, rashes, increased photosensitivity, panniculitis, palmoplantar and capillary involvement, pruritus and xerosis as well as granulomatous reactions. A 30-year-old patient with multiple tattoos received dabrafenib and trametinib for metastatic melanoma. After 4 months, he developed an induration and thickening strictly limited to several tattoos. Histopathology revealed nonnecrotizing granulomas in the dermis. Topical steroids relieved pruritus but not the granulomatous aspect of the tattoos. As far as we know, this is the first description of granulomatous reactions restricted to preexisting tattoos following BRAF inhibitor therapy.

5.
Hepatology ; 46(5): 1620-31, 2007 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-17929299

RESUMO

UNLABELLED: ADAMTS2 belongs to the "ADAM metallopeptidase with thrombospondin type 1 motif" (ADAMTS) family. Its primary function is to process collagen type I, II, III, and V precursors into mature molecules by excising the aminopropeptide. This process allows the correct assembly of collagen molecules into fibrils and fibers, which confers to connective tissues their architectural structure and mechanical resistance. To evaluate the impact of ADAMTS2 on the pathological accumulation of extracellular matrix proteins, mainly type I and III collagens, we evaluated carbon tetrachloride-induced liver fibrosis in ADAMTS2-deficient (TS2(-/-)) and wild-type (WT) mice. A single carbon tetrachloride injection caused a similar acute liver injury in deficient and WT mice. A chronic treatment induced collagen deposition in fibrous septa that were made of thinner and irregular fibers in TS2(-/-) mice. The rate of collagen deposition was slower in TS2(-/-) mice, and at an equivalent degree of fibrosis, the resorption of fibrous septa was slightly faster. Most of the genes involved in the development and reversion of the fibrosis were similarly regulated in TS2(-/-) and WT mice. CONCLUSION: These data indicate that the extent of fibrosis is reduced in TS2(-/-) mice in comparison with their WT littermates. Inhibiting the maturation of fibrillar collagens may be a beneficial therapeutic approach to interfering with the development of fibrotic lesions.


Assuntos
Proteínas ADAM/antagonistas & inibidores , Cirrose Hepática/tratamento farmacológico , Pró-Colágeno N-Endopeptidase/antagonistas & inibidores , Proteínas ADAMTS , Proteína ADAMTS4 , Animais , Tetracloreto de Carbono/administração & dosagem , Tetracloreto de Carbono/toxicidade , Colágeno/ultraestrutura , Regulação da Expressão Gênica , Injeções Intraperitoneais , Fígado/ultraestrutura , Cirrose Hepática/induzido quimicamente , Cirrose Hepática/patologia , Camundongos , Camundongos Knockout
6.
Expert Opin Emerg Drugs ; 12(3): 345-53, 2007 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-17874965

RESUMO

Onychomycosis is a frequent disorder that represents the most prevalent fungal infection, particularly among older individuals. Diverse fungi of the dermatophyte, non-dermatophyte mold and yeast families have been reported to be responsible for onychomycosis. The output from the pharmaceutical industry of new antifungals to treat onychomycosis has been limited over the last decade. Present treatment options include both oral and topical drugs, with oral therapies giving better outcomes. However, neither of these treatment options provides high cure rates that are durable. At present, azoles and allylamines are keeping the pivotal roles. New derivatives with a favorable risk-benefit ratio and new formulations of older azoles seem to be promising. Thus, ongoing drug development activities have focused on novel delivery technologies to facilitate incorporation of existing antifungal drugs inside the nail plate and the discovery of new active antifungals.


Assuntos
Antifúngicos/uso terapêutico , Drogas em Investigação/uso terapêutico , Dermatoses do Pé/tratamento farmacológico , Dermatoses da Mão/tratamento farmacológico , Onicomicose/tratamento farmacológico , Administração Oral , Administração Tópica , Animais , Antifúngicos/administração & dosagem , Antifúngicos/química , Desenho de Fármacos , Drogas em Investigação/administração & dosagem , Drogas em Investigação/química , Humanos
7.
Case Rep Dermatol ; 9(2): 35-39, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28690516

RESUMO

Eruptive seborrheic keratoses (ESK) are rare in dermatology. They are usually inflammatory in nature and may be encountered as Leser-Trélat sign. ESK may also be simultaneously observed with hepatic angiomas, chemotherapy, segmental neurofibromatosis, HIV or erythrodermic pityriasis rubra pilaris, psoriasis, and drug eruption. ESK may be transient and self-healing. Others recede after successful treatment of the underlying disease. In some instances, seborrheic keratoses may follow an isotopic response and remain strictly restricted to sites of previous eczema, photo-exposition or tattoos. A patient with patch/plaque lesions of classic-type mycosis fungoides (MF) presented sudden ESK that were exclusively limited to the MF lesions. In conclusion, this patient combined an isotopic response and ESK.

8.
Case Rep Dermatol ; 9(3): 151-157, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-29033820

RESUMO

BACKGROUND: Pachyderma is defined as severely thickened skin with deep folds and is occasionally observed with primary cutaneous NK and T-cell lymphoma (pCNKTCL), primary cutaneous B-cell lymphoma (pCBCL), and leukemia cutis (LC). AIM: To describe the clinical, histological, and therapeutic particularities of a series of pCNKTCL, pCBCL, and LC patients with pachyderma. RESULTS: In a series of pCNKTCL (n = 70), pCBCL (n = 12), and LC (n = 2) patients followed up during 9 years, 6 cases of pachyderma were observed. Pachyderma occurred on the arms (n = 2), thighs (n = 1), forehead (n = 1), and face (n = 2). The mean age of the patients was 69 years (51-82). The stages were erythrodermic (T4) mycosis fungoides (MF) (n = 1), folliculotropic MF (FMF) (n = 2), classic (T2) MF (n = 2), and chronic myeloid leukemia (n = 1). The erythrodermic MF patient with acute pachyderma on the right arm responded rapidly to oral steroids. The other cases were indolent, appeared progressively, and were highly treatment resistant. Histology revealed dense dermal neoplastic infiltration. The immunohistological profile of the pachydermic lesions was similar to common MF and LC. CONCLUSION: Pachyderma is an atypical manifestation of MF and LC and may occur on the face (FMF) or the extremities (MF). The rapidly appearing pachyderma may be transitory and responds readily to oral steroids.

9.
Am J Clin Dermatol ; 7(4): 267-9, 2006.
Artigo em Inglês | MEDLINE | ID: mdl-16901188

RESUMO

A 7-year-old, otherwise healthy Peruvian boy presented with a 3-month history of an indurated centrofacial plaque. Histologic examination revealed a granuloma containing free-living amebae tentatively identified as Balamuthia mandrillaris. The patient failed to respond to tentative treatment. He was admitted to the intensive care unit 7 months later with neurologic manifestations of granulomatous amebic encephalitis, which proved fatal. The difficulty in diagnosing this rare presentation of cutaneous amebiasis, the challenge of treating the condition, and the morbidity and high mortality associated with cerebral involvement are discussed.


Assuntos
Amebíase/patologia , Encefalite/parasitologia , Granuloma/parasitologia , Granulomatose Orofacial/patologia , Lobosea , Meningite/parasitologia , Animais , Criança , Encefalite/mortalidade , Encefalite/patologia , Granuloma/patologia , Granulomatose Orofacial/parasitologia , Humanos , Masculino , Meningite/mortalidade , Meningite/patologia
10.
Dermatol Clin ; 24(3): 371-4, 2006 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-16798435

RESUMO

The misdiagnosis of onychomycosis delays the proper treatment of the nail condition. Nail histomycology refers to the microscopic examination of histologic sections prepared from nail clippings for the purpose of detecting the presence of fungi. This laboratory method is the most sensitive procedure for the diagnosis of onychomycosis. It allows for the visualization of the precise location of the invasive fungus inside the nail apparatus. The method also distinguishes various shapes of the fungal cells, in particular filamentous fungi, yeasts, conidia, and sporodochia. The correct diagnosis provided by histomycology combined with culture not only allows for more efficient expenditure of funds and services but also is important for the timely alleviation of the disorder.


Assuntos
Onicomicose/diagnóstico , Diagnóstico Diferencial , Dermatoses do Pé/diagnóstico , Dermatoses do Pé/patologia , Dermatoses da Mão/diagnóstico , Dermatoses da Mão/patologia , Técnicas Histológicas , Humanos , Onicomicose/patologia
11.
Case Rep Dermatol ; 8(2): 118-23, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27462219

RESUMO

A 52-year-old White man presented with a dozen small, well-restricted, punctiform, asymptomatic, blue-gray macules on the left shoulder. A few months earlier, he had been treated with oral acyclovir for herpes zoster (HZ) affecting the left C7-C8 dermatomes. All the blue macules appeared over a short period of time and then remained stable. The patient had not experienced any previous trauma or had tattooing in this anatomical region. The clinical diagnosis suggested blue nevi. Dermatoscopy revealed small, well-limited, dark-blue, compact, homogeneous areas evoking dermal blue nevi. An excisional biopsy was performed and the histological examination confirmed a blue nevus. As far as we are aware of, this is the first report of eruptive blue nevi following HZ, and it should be included in the differential diagnosis of zosteriform dermatoses responding to an isotopic pathway. In addition, a brief review concerning eruptive nevi is presented.

12.
Melanoma Res ; 26(6): 631-634, 2016 12.
Artigo em Inglês | MEDLINE | ID: mdl-27537773

RESUMO

Increased awareness among dermatologists as well as the development of dermoscopy and sequential dermoscopy have contributed significantly toward an increase in the diagnostic accuracy of pigmented melanoma and even of amelanotic melanoma. However, the dermatologist's nightmare is the small group of melanomas that present as common skin diseases, often associated with a significant delay in diagnosis and hence a poor prognosis. The study was carried out to prospectively assess the number of melanomas lacking any clinical suspicion of melanoma and to describe their clinical and histological features over a 6-year observation period in an University Tertiary Skin Cancer Center. Out of 502 cases of newly diagnosed cases of melanoma, seven (1.4%) nonpigmented and nonamelanotic cases of melanoma were identified. The mean age of the patients was 69 years (two females/five males). All cases were discovered by chance on a punch biopsy. The clinical diagnostic suspicions were basal cell carcinoma, fungal intertrigo, keratoacanthoma, lichenoid keratoma, diabetic foot ulcer, eczema, and necrotic pressure ulcer. Dermoscopy, performed after the punch biopsies, was only partially contributive. The mean histological thickness was 2.7 mm, the mean number of mitoses was 7/mm, local micrometastases were present in 5/7 (71%), the mean Ki67 count was 18.9%, and a positive sentinel lymph node was observed in 4/6 (66%) cases. Nonpigmented and nonamelanotic melanomas are rare, are at high risk, and have a poor prognosis because of a delayed diagnosis. Dermoscopy is only of partial diagnostic aid. Treatment resistance or atypical behavior of the above-mentioned lesions should lead to biopsy.


Assuntos
Melanoma/patologia , Neoplasias Cutâneas/patologia , Idoso , Diagnóstico Diferencial , Feminino , Humanos , Masculino , Melanoma/diagnóstico , Neoplasias Cutâneas/diagnóstico
13.
Melanoma Res ; 15(2): 107-10, 2005 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-15846143

RESUMO

It is acknowledged that tumour thickness, ulceration and lymph node invasion are the most important prognostic factors for cutaneous melanomas. Other histopathological features may also be informative. The aim of this study was to ascertain whether immunohistochemical methods can improve the detection of satellite micrometastases in primary melanoma patients. In addition, the predictive value of cutaneous satellite micrometastases for sentinel lymph node involvement was evaluated. A total of 265 primary cutaneous melanomas and 68 of the respective sentinel nodes were studied using a panel of seven antibodies directed against melanocyte-related antigens. In 12.4% of the 265 cases, small satellite micrometastases were detected by immunohistochemistry. Sentinel lymph node metastases were found in 14% of the 68 cases. Invasion of the sentinel lymph node correlated with the presence of cutaneous satellite micrometastases. It is concluded that the presence of cutaneous satellite micrometastases may be an indication for the performance of sentinel lymph node biopsy, and this finding calls for a closer follow-up of these patients.


Assuntos
Melanoma/secundário , Neoplasias Cutâneas/patologia , Adulto , Animais , Feminino , Humanos , Imuno-Histoquímica , Linfonodos/patologia , Metástase Linfática , Masculino , Melanoma/patologia , Pessoa de Meia-Idade , Invasividade Neoplásica , Coelhos , Biópsia de Linfonodo Sentinela
14.
Rev Iberoam Micol ; 22(3): 163-6, 2005 Sep.
Artigo em Espanhol | MEDLINE | ID: mdl-16309353

RESUMO

Onychomycoses represent a group of nail affections caused by one or more fungi. Whether aging represents a risk factor for developing onychomycosis, remains a question. In the present work, we studied the variations in frequency and prevalence of onychomycoses and non-mycotic onychodystrophies according to age. Our results show that there is an increase in the frequency and prevalence of onychomycoses and non-mycotic onychodystrophies predominantly in patients over forty years of age.


Assuntos
Onicomicose/epidemiologia , Adolescente , Adulto , Distribuição por Idade , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Bélgica/epidemiologia , Criança , Suscetibilidade a Doenças , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Doenças da Unha/epidemiologia , Fatores de Risco
15.
Int J Oncol ; 24(1): 211-6, 2004 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-14654959

RESUMO

There is increasing awareness of the population about the risk of cutaneous melanoma. In recent years, some improvement was gained in the early recognition of clinical warning signs using dermoscopy. As a result, the number of puzzling cases exhibiting limited classical clues for malignancy are submitted to the dermatopathologist. Thus, the risk of microscopic uncertainty or misdiagnosis may be increasing. The aim of the study was to assess retrospectively the contribution of immunohistochemistry in establishing the histological diagnosis of 520 melanocytic neoplasms. According to the disease evolution and the histological presentation, 6 profiles of phenotypical expressions were distinguished.


Assuntos
Biomarcadores Tumorais/análise , Melanoma/diagnóstico , Núcleosídeo-Difosfato Quinase , Neoplasias Cutâneas/diagnóstico , Anticorpos Monoclonais/imunologia , Antígenos de Neoplasias/análise , Biomarcadores Tumorais/imunologia , Fator XIIIa/análise , Glicoproteínas/análise , Humanos , Imuno-Histoquímica , Antígeno Ki-67/análise , Antígeno MART-1 , Melanoma/metabolismo , Antígenos Específicos de Melanoma , Monofenol Mono-Oxigenase/análise , Nucleosídeo NM23 Difosfato Quinases , Proteínas de Neoplasias/análise , Lectinas de Plantas/análise , Prognóstico , Proteínas/análise , Estudos Retrospectivos , Proteínas S100/análise , Neoplasias Cutâneas/metabolismo
16.
Am J Clin Dermatol ; 4(11): 799-802, 2003.
Artigo em Inglês | MEDLINE | ID: mdl-14572301

RESUMO

BACKGROUND: Melanotic schwannoma is a pigmented nerve tumor that may be located in the skin and express local aggressivity. This tumor may occur singly. It may also be part of the Carney complex which consists of various, but specific, tumors. OBJECTIVE: We report two cases of subcutaneous melanotic schwannoma localized on the trunk in two men aged 37 and 45 years. METHODS: Conventional histology and immunohistochemistry were performed. RESULTS: One melanotic schwannoma was associated with a cutaneous atypical myxoma and multiple melanocytic lesions, all being part of the Carney complex. The other case had no associated signs. In both cases, the melanotic schwannoma was completely excised and did not recur. CONCLUSION: Melanotic schwannoma is rare and curable by surgery. It must not be confused with malignant melanoma and other pigmented neoplasms. The Carney complex should be carefully ruled out.


Assuntos
Melaninas/metabolismo , Neurilemoma/metabolismo , Neurilemoma/cirurgia , Neoplasias Cutâneas/metabolismo , Neoplasias Cutâneas/cirurgia , Adulto , Humanos , Masculino , Pessoa de Meia-Idade , Mixoma/diagnóstico , Mixoma/cirurgia , Neurilemoma/diagnóstico , Neoplasias Cutâneas/diagnóstico
17.
Dermatol Ther (Heidelb) ; 4(1): 131-5, 2014 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24691652

RESUMO

BACKGROUND: Treatment options for melanoma in situ (MIS) include imiquimod, radiation therapy, cryotherapy, excisional and Mohs surgery. Ingenol mebutate is a new topical treatment option recognized for actinic keratosis. Although in vitro effectiveness has been demonstrated on melanoma cell lines, its therapeutic potential for in vivo melanomas is unknown. CASE REPORT: In 2011, a 91-year-old woman presented a thick melanoma of her cheek. The lateral sections revealed persisting in situ melanoma, which were again excised. She presented for follow-up and a recurrent MIS was evidenced centered on the previous scar. She refused further surgery and ingenol mebutate (0.015% gel) was administered on three consecutive days. One month later, a complete clinical resolution was observed. Histology and immunohistology revealed no residual MIS. CONCLUSION: In this patient, ingenol mebutate was successful and well-tolerated as a topical, alternative therapy for MIS after failure of other treatment options.

19.
Rare Tumors ; 5(2): 60-1, 2013 Apr 15.
Artigo em Inglês | MEDLINE | ID: mdl-23888215

RESUMO

Myxofibrosarcoma (MFS) is a variant of the group of malignant fibrous histiocytomas. It is one of the most aggressive types of soft tissue neoplasms. The clinical presentation is not pathognomonic and the histological aspects are highly heterogenous, frequently delaying the diagnosis or leading to misdiagnosis. Complementary histochemical and immunohistochemical stainings are mandatory to achieve the diagnosis of MFS. A 78-year-old male patient is presented illustrating this diagnostic pitfall. Extensive surgery followed by radiotherapy is the first choice treatment.

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