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1.
Am J Dermatopathol ; 45(3): e17-e21, 2023 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-36728280

RESUMO

ABSTRACT: Rhabdomyosarcoma (RMS) is one of the most common soft tissue sarcomas in children. This lesion is classically included in the generic group of "small round blue cell tumors" along with other entities that share similar microscopic features. Although the head and neck region is a frequent site for primary tumors, cutaneous metastases of RMS involving this anatomical location are rare in the pediatric population. We report a case of a 12-year old girl previously diagnosed with a primary alveolar RMS involving the left maxillary sinus, presenting with a metastatic lesion on the skin of the left temple area. Along with a brief review of the previous case reports on the topic, we highlight the initial immunohistochemistry panel useful for diagnosing this tumor.


Assuntos
Rabdomiossarcoma Alveolar , Rabdomiossarcoma , Sarcoma , Neoplasias Cutâneas , Neoplasias de Tecidos Moles , Feminino , Humanos , Criança , Rabdomiossarcoma Alveolar/patologia , Rabdomiossarcoma/patologia , Neoplasias de Tecidos Moles/patologia
2.
Mod Pathol ; 35(11): 1562-1569, 2022 11.
Artigo em Inglês | MEDLINE | ID: mdl-35840721

RESUMO

Adenoid ameloblastoma is a very rare benign epithelial odontogenic tumor characterized microscopically by epithelium resembling conventional ameloblastoma, with additional duct-like structures, epithelial whorls, and cribriform architecture. Dentinoid deposits, clusters of clear cells, and ghost-cell keratinization may also be present. These tumors do not harbor BRAF or KRAS mutations and their molecular basis appears distinct from conventional ameloblastoma but remains unknown. We assessed CTNNB1 (beta-catenin) exon 3 mutations in a cohort of 11 samples of adenoid ameloblastomas from 9 patients. Two of the 9 patients were female and 7 male and in 7/9 patients the tumors occurred in the maxilla. Tumors of 4 of these 9 patients harbored CTNNB1 mutations, specifically p.Ser33Cys, p.Gly34Arg, and p.Ser37Phe. Notably, for one patient 3 samples were analyzed including the primary tumour and two consecutive recurrences, and results were positive for the mutation in all three tumors. Therefore, 6/11 samples tested positive for the mutation. In the 6 mutation-positive samples, ghost cells were present in only 2/6, indicating beta-catenin mutations are not always revealed by ghost cell formation. Dentinoid matrix deposition was observed in 5/6 mutation-positive samples and clear cells in all 6 cases. None of the cases harbored either BRAF or KRAS mutations. Beta-catenin immunoexpression was assessed in the samples of 8 patients. Except for one wild-type case, all cases showed focal nuclear expression irrespective of the mutational status. Together with the absence of BRAF mutation, the detection of beta-catenin mutation in adenoid ameloblastomas supports its classification as a separate entity, and not as a subtype of ameloblastoma. The presence of this mutation may help in the diagnosis of challenging cases.


Assuntos
Tonsila Faríngea , Ameloblastoma , Tumores Odontogênicos , Humanos , Masculino , Feminino , Ameloblastoma/genética , Ameloblastoma/patologia , beta Catenina/genética , beta Catenina/metabolismo , Proteínas Proto-Oncogênicas B-raf/genética , Tonsila Faríngea/metabolismo , Tonsila Faríngea/patologia , Proteínas Proto-Oncogênicas p21(ras)/genética , Proteínas Proto-Oncogênicas p21(ras)/metabolismo , Tumores Odontogênicos/patologia , Mutação
3.
J Clin Microbiol ; 52(8): 3127-9, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-24899034

RESUMO

Zoonotic anatrichosomiasis in a mother and daughter is reported. Both presented with a 10-week history of multiple painful oral ulcers. Biopsy specimens revealed the presence of small, coiled trichuroid nematodes with distinctive morphological features, including stichocytes and paired bacillary bands. This represents an unusual infection by a zoonotic Anatrichosoma species.


Assuntos
Nematoides/isolamento & purificação , Infecções por Nematoides/diagnóstico , Zoonoses/diagnóstico , Adulto , Animais , Biópsia , Feminino , Histocitoquímica , Humanos , Microscopia , Pessoa de Meia-Idade , Mães , Boca/patologia , Infecções por Nematoides/parasitologia , Infecções por Nematoides/patologia , Núcleo Familiar , Zoonoses/parasitologia , Zoonoses/patologia
4.
Artigo em Inglês | MEDLINE | ID: mdl-39179451

RESUMO

Hematolymphoid neoplasms originating in the periapical region of a tooth are rare occurrences. Their signs, symptoms, and radiographic findings can also mimic lesions of endodontic origin. History-taking and clinical examination provide clues to determine the possibility of a non-endodontic lesion, although the definitive diagnosis can only be rendered based on histologic examination. In our case series, we present four cases of hematolymphoid neoplasms that radiographically mimicked endodontic lesions. All the cases initially underwent endodontic treatment, but the lesions failed to resolve. In one case, the clinician suspected a diagnosis of lymphoma based on the patient's history. In the other cases, the clinicians' impression was that the lesions originated from endodontic issues. We present two cases of diffuse large B-cell lymphoma, a case of a plasma cell neoplasm, and a case of Langerhans cell histiocytosis, along with a literature review of three entities when found in the oral cavity as well as review of hematolymphoid neoplasm mimicking endodontic lesion previously reported in literature.

5.
J Am Acad Orthop Surg ; 21(3): 180-9, 2013 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-23457068

RESUMO

The Prevention of Orthopaedic Implant Infection in Patients Undergoing Dental Procedures evidence-based clinical practice guideline was codeveloped by the American Academy of Orthopaedic Surgeons (AAOS) and the American Dental Association. This guideline replaces the previous AAOS Information Statement, "Antibiotic Prophylaxis in Bacteremia in Patients With Joint Replacement," published in 2009. Based on the best current evidence and a systematic review of published studies, three recommendations have been created to guide clinical practice in the prevention of orthopaedic implant infections in patients undergoing dental procedures. The first recommendation is graded as Limited; this recommendation proposes that the practitioner consider changing the long-standing practice of routinely prescribing prophylactic antibiotic for patients with orthopaedic implants who undergo dental procedures. The second, graded as Inconclusive, addresses the use of oral topical antimicrobials in the prevention of periprosthetic joint infections. The third recommendation, a Consensus statement, addresses the maintenance of good oral hygiene.


Assuntos
Implantes Dentários , Procedimentos Cirúrgicos Bucais/efeitos adversos , Infecções Relacionadas à Prótese/prevenção & controle , Anti-Infecciosos/administração & dosagem , Antibioticoprofilaxia , Bacteriemia/epidemiologia , Odontologia Baseada em Evidências , Medicina Baseada em Evidências , Humanos , Incidência , Índice de Necessidade de Tratamento Ortodôntico , Higiene Bucal
6.
J Endod ; 2023 Aug 04.
Artigo em Inglês | MEDLINE | ID: mdl-37543187

RESUMO

INTRODUCTION: Radiographic findings in periradicular areas are repeatedly associated with infected root canal systems. Although non-odontogenic lesions in teeth are reported to be low, they often mimic periapical pathoses, and consequently, histopathologic examinations after surgical revisions are nurtured. METHODS: Biopsies submitted to the College of Dentistry between 2003 and 2021 were reviewed. Clinicopathologic characteristics were collected, including age, sex, medical history, location, sensibility tests, and clinic impressions from each specimen. Histopathologic diagnosis and gross description were also part of our database. RESULTS: A total of 72,055 pathology reports were reviewed, of which 10,031 lesions (13.9%) met the criterion of being intraosseous lesions at the periradicular area. Among those 10,031 lesions, 7.94% (n = 796) were of non-endodontic origin, 7153 were documented as non-vital, and 2.36% (n = 169) of these non-vital teeth were diagnosed with a non-endodontic origin. A total of 5707 lesions were obtained from surgeries within the periapical tissues, primarily performed by endodontists (94.02%). Non-endodontic lesions were reported in 1.09% of the cases. Odontogenic keratocyst was the most common non-endodontic diagnosis, followed by nasopalatine duct cyst and benign fibro-osseous lesion, respectively. CONCLUSIONS: Pathologic findings of the periradicular tissues are not always from endodontic origin. The probability of encountering non-endodontic lesions is almost 8%. Even in clinically reported teeth with pulp necrosis, 1%-3% of biopsies were confirmed as non-endodontic lesions.

7.
J Invest Dermatol ; 143(8): 1479-1486.e3, 2023 08.
Artigo em Inglês | MEDLINE | ID: mdl-36870557

RESUMO

Mucous membrane pemphigoid is an autoimmune disease with variable clinical presentation and multiple autoantigens. To determine whether disease endotypes could be identified on the basis of the pattern of serum reactivity, the clinical and diagnostic information of 70 patients with mucous membrane pemphigoid was collected, and reactivity to dermal or epidermal antigens, using indirect immunofluorescence, and specific reactivity to bullous pemphigoid (BP) autoantigens BP180 and BP230, collagen VII, and laminin 332 were evaluated. Most patients had lesions at multiple mucosae, with the most prevalent being oropharyngeal (mouth, gingiva, pharynx; 98.6%), followed by ocular (38.6%), nasal (32.9%), genital or anal (31.4%), laryngeal (20%), and esophageal (2.9%) sites and skin (45.7%). Autoantigen profiling identified BP180 (71%) as the most common autoantigen, followed by laminin 332 (21.7%), collagen VII (13%), and BP230 IgG (11.6%). Reactivity to dermal antigens predicted a more severe disease characterized by a higher number of total sites involved, especially high-risk sites, and a decreased response to rituximab. In most cases, identification of dermal indirect immunofluorescence reactivity is an accurate predictor of disease course; however, confirmation of laminin 332 reactivity is important, with dermal indirect immunofluorescence positivity because of an increased risk of solid tumors. In addition, the ocular mucosae should be monitored in patients with IgA on direct immunofluorescence.


Assuntos
Penfigoide Mucomembranoso Benigno , Penfigoide Bolhoso , Humanos , Autoanticorpos , Colágeno , Autoantígenos , Mucosa/patologia , Colágenos não Fibrilares , Penfigoide Mucomembranoso Benigno/diagnóstico
9.
Head Neck Pathol ; 13(1): 25-32, 2019 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-30693459

RESUMO

Candidiasis is a very common malady in the head neck region. This review will concentrate on intraoral, pharyngeal and perioral manifestations and treatment. A history of the origins associated with candidiasis will be introduced. In addition, oral conditions associated with candidiasis will be mentioned and considered. The various forms of oral and maxillofacial candidiasis will be reviewed to include pseudomembranous, acute, chronic, median rhomboid glossitis, perioral dermatitis, and angular cheilitis. At the end of this review the clinician will be better able to diagnose and especially treat candidal overgrowth of the oral facial region. Of particular interest to the clinician are the various treatment modalities with appropriate considerations for side effects.


Assuntos
Candidíase Bucal/diagnóstico , Candidíase Bucal/patologia , Humanos
10.
J Am Dent Assoc ; 139(12): 1674-7, 2008 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-19047674

RESUMO

BACKGROUND: and Overview. In 2005, the American Dental Association (ADA) Council on Scientific Affairs convened an expert panel to develop clinical recommendations for dentists treating patients who are receiving oral bisphosphonate therapy. The Journal of the American Dental Association published the resulting report in 2006. This 2008 advisory statement is the first of projected periodic updates of the 2006 clinical recommendations. CONCLUSION: This 2008 advisory statement concludes, on the basis of a review of the current literature, that for patients receiving bisphosphonate therapy, the risk of developing bisphosphonate-associated osteonecrosis (BON) of the jaw apparently remains low. It also newly concludes that current screening and diagnostic tests are unreliable for predicting a patient's risk of developing the condition. This statement updates the 2006 recommendations regarding general dentistry, management of periodontal diseases, implant placement and maintenance, oral and maxillofacial surgery, endodontics, restorative dentistry and prosthodontics, and orthodontics.


Assuntos
Conservadores da Densidade Óssea/efeitos adversos , Difosfonatos/efeitos adversos , Doenças Maxilomandibulares/prevenção & controle , Osteonecrose/prevenção & controle , American Dental Association , Conservadores da Densidade Óssea/uso terapêutico , Assistência Odontológica , Assistência Odontológica para Doentes Crônicos , Difosfonatos/uso terapêutico , Humanos , Doenças Maxilomandibulares/induzido quimicamente , Doenças Maxilomandibulares/diagnóstico , Doenças Maxilomandibulares/terapia , Osteonecrose/induzido quimicamente , Osteonecrose/diagnóstico , Osteonecrose/terapia , Osteoporose/tratamento farmacológico , Guias de Prática Clínica como Assunto , Estados Unidos
12.
Ann Intern Med ; 144(10): 753-61, 2006 May 16.
Artigo em Inglês | MEDLINE | ID: mdl-16702591

RESUMO

Osteonecrosis of the jaws is a recently described adverse side effect of bisphosphonate therapy. Patients with multiple myeloma and metastatic carcinoma to the skeleton who are receiving intravenous, nitrogen-containing bisphosphonates are at greatest risk for osteonecrosis of the jaws; these patients represent 94% of published cases. The mandible is more commonly affected than the maxilla (2:1 ratio), and 60% of cases are preceded by a dental surgical procedure. Oversuppression of bone turnover is probably the primary mechanism for the development of this condition, although there may be contributing comorbid factors. All sites of potential jaw infection should be eliminated before bisphosphonate therapy is initiated in these patients to reduce the necessity of subsequent dentoalveolar surgery. Conservative débridement of necrotic bone, pain control, infection management, use of antimicrobial oral rinses, and withdrawal of bisphosphonates are preferable to aggressive surgical measures for treating this condition. The degree of risk for osteonecrosis in patients taking oral bisphosphonates, such as alendronate, for osteoporosis is uncertain and warrants careful monitoring.


Assuntos
Conservadores da Densidade Óssea/efeitos adversos , Difosfonatos/efeitos adversos , Doenças Maxilomandibulares/induzido quimicamente , Osteonecrose/induzido quimicamente , Conservadores da Densidade Óssea/farmacologia , Difosfonatos/farmacologia , Humanos , Doenças Maxilomandibulares/epidemiologia , Doenças Maxilomandibulares/terapia , Osteonecrose/epidemiologia , Osteonecrose/terapia , Prevalência , Fatores de Risco , Suspensão de Tratamento
13.
J Endod ; 32(6): 563-5, 2006 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-16728252

RESUMO

This study evaluated the amount of calcium hydroxide [Ca(OH)(2))] remaining in canals after removal with various techniques including combinations of NaOCl with EDTA irrigation, hand filing, rotary instrumentation, or ultrasonics. The mesial canals of 12 mandibular molars were uniformly instrumented. Teeth were sectioned longitudinally along the length of the instrumented canals. Acrylic jigs were fabricated, allowing reapproximation of the opposing segments. After Ca(OH)2 placement into the canals, four techniques were used for its removal. In the first method, the master apical file was placed to working length in between two 5-ml rinses of NaOCl. The other three techniques combined with the first method either a 2.5-ml EDTA rinse, a rotary file (MAF size) to working length, or passive ultrasonication. Results showed that no technique removed all Ca(OH)2. Rotary and ultrasonic techniques, while not different from each other, removed significantly more Ca(OH)2 than irrigant only techniques. The irrigant only techniques were not different from each other.


Assuntos
Hidróxido de Cálcio , Irrigantes do Canal Radicular/administração & dosagem , Humanos , Tratamento do Canal Radicular/instrumentação
14.
Spec Care Dentist ; 26(1): 8-12, 2006.
Artigo em Inglês | MEDLINE | ID: mdl-16703928

RESUMO

Patient exposure to bisphosphonate drugs for the management of hypercalcemia of malignancy, osteolytic lesions of metastatic cancer and osteoporosis has led to increasing reports of osteochemonecrosis of the jaws (bis-phossy jaw). This serious and debilitating condition requires dental practitioners to be alert for signs and symptoms of this syndrome. Thus far, nitrogen containing bisphosphonates have been implicated as a causative agent. While only a small fraction of patients who have taken these agents will develop osteochemonecrosis, it seems that patients who have received intravenous bisphosphonates are at greater risk than those who have taken oral agents. Tooth extractions are the most frequently reported predisposing dental procedure. While appropriate management strategies for patients with osteochemonecrosis of the jaws are evolving, we are suggesting rational preventive protocols and therapies based upon current experience and knowledge. These recommendations may change over time as the profession gains more experience in managing these patients.


Assuntos
Conservadores da Densidade Óssea/efeitos adversos , Assistência Odontológica para Doentes Crônicos , Difosfonatos/efeitos adversos , Doenças Maxilomandibulares/induzido quimicamente , Osteonecrose/induzido quimicamente , Administração Oral , Antibacterianos/uso terapêutico , Antineoplásicos/efeitos adversos , Conservadores da Densidade Óssea/administração & dosagem , Conservadores da Densidade Óssea/química , Neoplasias Ósseas/tratamento farmacológico , Difosfonatos/administração & dosagem , Difosfonatos/química , Humanos , Injeções Intravenosas , Doenças Maxilomandibulares/prevenção & controle , Nitrogênio , Osteonecrose/prevenção & controle , Osteoporose/prevenção & controle , Gestão de Riscos
15.
Artigo em Inglês | MEDLINE | ID: mdl-27068680

RESUMO

OBJECTIVES: To retrospectively study the prevalence of perineural invasion (PNI) in cases of mucoepidermoid carcinoma (MEC). The study evaluated if previously assessed PNI would be increased by re-review of the original hematoxylin and eosin-stained (H&E) slides and also review of slides reacted immunohistochemically with S100 to enhance nerve visualization and whether this is associated with clinical outcome. STUDY DESIGN: Thirty-one cases were reviewed for PNI with H&E-stained slides as well as S-100-reacted slides. These results were compared with the original pathology report's PNI status when available (13 of 31). Subject demographic characteristics and clinical outcome were collected from electronic medical records. RESULTS: PNI was identified in 23% (3 of 13) of tumors in the original reports, 13% (4 of 31) of the authors' re-review of the slides, and 29% (9 of 31) by immunohistochemical assessment for S100. PNI and larger-diameter nerve involvement were significantly associated with death at 5-year follow-up. CONCLUSIONS: Immunohistochemical assessment for S100 improves the accuracy of PNI determination. PNI is a significant factor in the survival outcome of cases of MEC.


Assuntos
Carcinoma Mucoepidermoide/patologia , Imuno-Histoquímica , Invasividade Neoplásica/patologia , Neoplasias das Glândulas Salivares/patologia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma Mucoepidermoide/terapia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Gradação de Tumores , Estadiamento de Neoplasias , Estudos Retrospectivos , Neoplasias das Glândulas Salivares/terapia
16.
Head Neck Pathol ; 10(4): 521-526, 2016 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-27278378

RESUMO

The aim of this study was to compare the immunoexpression of epithelial mucins (MUCs) in salivary duct cysts, papillary cystadenomas, and mucoepidermoid carcinomas and to evaluate if any of these markers could be useful for differentiating between mucoepidermoid carcinoma and papillary cystadenoma. We also sought to validate the p63 expression pattern found to differentiate between mucoepidermoid carcinoma and papillary cystadenoma. Immunoexpression of MUC1, MUC2, MUC4, MUC7, and p63 was studied and quantified in 22 mucoepidermoid carcinomas, 12 papillary cystadenomas, and 3 salivary duct cysts. The immunohistochemical evaluation was collectively performed by 3 oral pathologists. Scores and trends in proportions were assessed using the nonparametric Wilcoxon-Mann-Whitney rank sum test. Mucoepidermoid carcinomas, papillary cystadenomas, and salivary duct cysts demonstrated variable MUC expression patterns. All tumors were positive for p63 immunoexpression with p63 labeling in salivary duct cysts and papillary cystadenomas (15/15) limited to the basal layers of the cystic spaces, whereas in mucoepidermoid carcinomas (22/22) the p63 labeling extended throughout the suprabasal layers (p < 0.001). This study adds more confirmatory data to validate that the reactivity pattern of p63 protein can be used in distinguishing between papillary cystadenoma and low-grade mucoepidermoid carcinoma. Although positive reactivity in a tumor with MUC1 and MUC4 was inconclusive, negative reactivity suggests the diagnosis of a benign PC or SDC.


Assuntos
Biomarcadores Tumorais/análise , Carcinoma Mucoepidermoide/diagnóstico , Cistadenoma Papilar/diagnóstico , Proteínas de Membrana/biossíntese , Mucinas/biossíntese , Neoplasias das Glândulas Salivares/diagnóstico , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Diagnóstico Diferencial , Feminino , Humanos , Imuno-Histoquímica , Masculino , Proteínas de Membrana/análise , Pessoa de Meia-Idade , Mucinas/análise
17.
J Endod ; 29(10): 674-8, 2003 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-14606795

RESUMO

A total of 100 maxillary molar canals were hand instrumented to a master apical file size #35 and flared to a size #60 file. The canals were randomly divided into 5 groups of 20 each. Group 1 received no further treatment. Groups 2 and 3 received passive sonic irrigation for 30 and 60 s, respectively. Groups 4 and 5 received passive ultrasonic irrigation for 30 and 60 s, respectively. The roots were split longitudinally and photographed with a digital camera. The apical portion of the root was magnified to 100x. A debris score was calculated for the apical 3 and 6 mm. The debris score was calculated as a percentage of the total area of the canal that contained debris as determined by pixels in Adobe Photoshop 5.0. Passive sonic or ultrasonic irrigation, for as little as 30 s, resulted in significantly cleaner canals than hand filing alone. Ultrasonic passive irrigation produced significantly cleaner canals than passive sonic irrigation, when sonic and ultrasonic passive irrigation were compared with only each other.


Assuntos
Irrigantes do Canal Radicular/administração & dosagem , Preparo de Canal Radicular/métodos , Camada de Esfregaço , Hipoclorito de Sódio/administração & dosagem , Análise de Variância , Humanos , Dente Molar , Preparo de Canal Radicular/instrumentação , Sonicação , Estatísticas não Paramétricas , Irrigação Terapêutica/métodos , Ultrassom
18.
J Contemp Dent Pract ; 3(4): 66-72, 2002 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-12444403

RESUMO

A healthy 25-year old Caucasian man presented for a routine dental examination. He was unaware of a subtle expansion involving the right posterior mandible, which was bony hard and nontender. Radiographic findings prompted an immediate referral of the patient to an oral and maxillofacial surgeon for diagnosis and management of the jaw lesion. What is your diagnosis?


Assuntos
Doenças Mandibulares/patologia , Adulto , Humanos , Masculino , Doenças Mandibulares/diagnóstico por imagem , Radiografia Panorâmica , Tomografia Computadorizada por Raios X
19.
Head Neck Pathol ; 8(4): 482-90, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25409847

RESUMO

Osteonecrosis of the jaw to a certain extent has been with us for many years. But recently the advent of various medications such as bisphosphonates, VEGF inhibitors, tyrosine kinase inhibitors and humanized antibodies to osteoclastic action have resulted in thousands of cases. While the bisphosphonates continue to be the most common medication associated with osteochemonecrosis antibodies such as denosumab which irreversibly act on osteoclastic action are also being reported. This narrative review will serve as an update with a focus on some of the histopathologic features discussed and reviewed. Perhaps even more uncommonly seen in past reports a discussion of features possibly observed while grossing specimens will be discussed. At the end of this report is hoped that the pathologist will have a better understanding of the historical features, clinical settings, gross examination features as well as histopathologic features associated with osteochemonecrosis.


Assuntos
Anticorpos Monoclonais Humanizados/efeitos adversos , Osteonecrose da Arcada Osseodentária Associada a Difosfonatos/patologia , Conservadores da Densidade Óssea/efeitos adversos , Osteonecrose/induzido quimicamente , Denosumab , Humanos
20.
J Am Dent Assoc ; 150(9): 735-736, 2019 09.
Artigo em Inglês | MEDLINE | ID: mdl-31439199
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