Oral lichen planus with cutaneous manifestations: case report with emphasis on dental diagnostic criteria / Líquen plano oral com manifestações cutâneas: relato de caso com ênfase nos critérios de diagnóstico odontológico

ABSTRACT Lichen planus is a chronic inflammatory disease involving the skin and mucosa, which often affects the oral cavity. The objective of this study is to report a case of oral lichen planus (OLP) with cutaneous manifestations and to discuss the clinical, histopathological aspects and the established treatment. A 61-years-old female white patient was referred for evaluation of white lesions in the oral mucosa. In the intraoral examination, multiple white lesions with striated appearance were observed in the jugal mucosa, tongue and border. The extraoral examination revealed scaly lesions on the arm, white spots on the legs, and nail dystrophy on feet. Based on biopsy of the oral lesions and the histopathological analysis, the diagnosis of OLP was confirmed. The patient underwent treatment with clobetasol propionate topical cream (0.5 mg), and was instructed to apply it to affected area, once or twice a day for four weeks. In the clinical follow-up after one month and 15 days, the improvement of the lesions could be analyzed. As OLP is a disease with an etiopathogenesis that is still poorly recognized, several factors may enable the development of this condition. Therefore, the dentist's clinical view is essential for the most effective treatment.

RESUMEN El liquen plano es una enfermedad inflamatoria crónica que involucra piel y mucosa, con frecuencia de la cavidad bucal. Los objetivos de este estudio son reportar un caso de liquen plano oral (LPO) con manifestaciones cutáneas y discutir sus aspectos clínicos e histopatológico, así como el tratamiento establecido. Reportamos el caso de una mujer de 61 años de edad, raza blanca, que fue remitida para evaluación de lesiones blancas en la mucosa bucal. En el examen intraoral se observaron lesiones blancas múltiples estriadas en mucosa yugal, lengua y cresta; en el examen extraoral, lesiones descamativas en el brazo, manchas blancas en las piernas y uñas distróficas en los pies. Basándose en la biopsia de las lesiones bucales y en el análisis histopatológico, el diagnóstico de LPO se confirmó. La paciente fue sometida a tratamiento con propionato de clobetasol crema (0,5 mg) y aconsejada a aplicar el medicamento sobre el área afectada, una o dos veces al día, por cuatro semanas. En el seguimiento clínico, al cabo de un mes y 15 días, fue posible analizar la mejoría de las lesiones. Por tratarse de una enfermedad de etiología todavía poco conocida, varios factores pueden favorecer su desarrollo. Así, el ojo clínico del cirujano dentista es imprescindible para un tratamiento más efectivo.

RESUMO O líquen plano é uma doença inflamatória crônica que envolve pele e mucosa, acometendo frequentemente a cavidade bucal. Os objetivos deste estudo são relatar um caso de líquen plano oral (LPO) com manifestações cutâneas e discutir os aspectos clínicos e histopatológicos, bem como o tratamento estabelecido. Relatamos o caso de uma mulher, 61 anos de idade, leucoderma, que foi encaminhada para avaliação de lesões brancas na mucosa bucal. Ao exame intraoral, foram observadas múltiplas lesões brancas com aspecto estriado em mucosa jugal, língua e rebordo; ao exame extraoral, lesões de aspecto descamativo no braço, manchas brancas nas pernas e unhas distróficas nos pés. Com base na biópsia das lesões bucais e na análise histopatológica, o diagnóstico de LPO foi confirmado. A paciente foi submetida ao tratamento com propionato de clobetasol em creme (0,5 mg) e orientada a fazer a aplicação na área afetada, uma a duas vezes ao dia, durante quatro semanas. No acompanhamento clínico após um mês e 15 dias, pôde-se analisar a melhora das lesões. Por se tratar de uma doença com etiopatogênese ainda pouco reconhecida, vários fatores podem possibilitar o desenvolvimento dessa condição. Dessa forma, é imprescindível o olhar clínico do cirurgião-dentista para o tratamento mais eficaz.

Ameloblastic carcinoma arising from a preexistent ameloblastoma / Carcinoma ameloblástico decorrente de um ameloblastoma preexistente

ABSTRACT Ameloblastic carcinoma (AC) is a rare odontogenic tumor that represents the malignant counterpart of an ameloblastoma. There are few cases of AC in the English-language literature, with only 16 cases arising from preexisting ameloblastomas reported in the last 10 years. Multiple local recurrences of ameloblastomas precede this transformation. In the current report, we describe a case of AC at the posterior maxilla in a 42-year-old female submitted to surgical resection, with three recurrences of ameloblastoma in a period of four years. Imaging exams showed a radiodense mass with cortical bone disruption and maxillary sinus invasion. Histologic analysis demonstrated features of islands and nests of malignant epithelium transformation, atypia, pleomorphic cells, nuclear hyperchromatism, necrosis and desmoplasia. AC represents a rare and challenging histologic diagnosis. Surgical access with adequate hard and soft tissue margins is essential for influencing survival. The description of new cases may reveal, through of treatment and clinical follow-up, characteristics that allow us better understanding of AC behavior.

RESUMEN El carcinoma ameloblástico (CA) es un tumor odontogénico raro que representa el equivalente maligno de un ameloblastoma. Hay pocos casos de CA en la literatura en lengua inglesa: en los últimos 10 años, sólo se reportaron 16 casos originados de ameloblastomas previos. Múltiples recidivas locales de este tumor preceden esa transformación. En este reporte, describimos un caso de CA en región posterior de maxila en una mujer de 42 años de edad, sometida a resección quirúrgica. En un periodo de cuatro años, se produjeron tres recurrencias del ameloblastoma. Exámenes de imagen muestran una masa radiodensa con destrucción cortical e invasión del seno maxilar. El análisis histológico ha revelado islas y nidos característicos de transformación epitelial maligna, atipias, pleomorfismo celular, hipercromatismo nuclear, necrosis y desmoplasia. El diagnóstico histológico del CA representa un raro desafío. El abordaje quirúrgico con ampliación de los márgenes de tejido duro y blando es esencial en la sobrevida del paciente. La descripción de nuevos casos puede revelar, mediante tratamiento y acompañamiento clínico, características que ayuden a comprender mejor el comportamiento del CA.

RESUMO O carcinoma ameloblástico (CA) é um tumor odontogênico raro que representa o equivalente maligno de um ameloblastoma. Existem poucos casos de CA na literatura em inglês: nos últimos 10 anos, foram relatados apenas 16 casos surgidos de ameloblastomas preexistentes. Múltiplas recorrências locais desse tumor precedem essa transformação. Neste relato, descrevemos um caso de CA em região posterior de maxila em uma mulher de 42 anos de idade, submetida à ressecção cirúrgica. Em um período de quatro anos, ocorreram três recidivas do ameloblastoma. Exames de imagem exibiram uma massa radiodensa com destruição da cortical óssea e invasão do seio maxilar. A análise histológica revelou ilhas e ninhos característicos de transformação maligna epitelial, atipias, pleomorfismo celular, hipercromatismo nuclear, necrose e desmoplasia. O CA representa um raro e desafiador diagnóstico histológico. O acesso cirúrgico com ampliação das margens de tecido duro e mole é essencial para o impacto na sobrevida do paciente. A descrição de novos casos pode revelar, por meio do tratamento e do acompanhamento clínico, características que ajudem a entender melhor o comportamento do CA.

Circulating Senescent T Cells Are Linked to Systemic Inflammation and Lesion Size During Human Cutaneous Leishmaniasis.

Leishmania (Viannia) braziliensis induces American tegumentary leishmaniasis that ranges in severity from the milder form, cutaneous (CL) to severe disseminated cutaneous leishmaniasis. Patients with CL develop a cell-mediated Th1 immune response accompanied by production of inflammatory cytokines, which contribute to parasite control and pathogenesis of disease. Here, we describe the accumulation of circulating T cells with multiple features of telomere dependent-senescence including elevated expression of CD57, KLRG-1, and γH2AX that have short telomeres and low hTERT expression during cutaneous L. braziliensis infection. This expanded population of T cells was found within the CD45RA+CD27- (EMRA) subset and produced high levels of inflammatory cytokines, analogous to the senescence-associated secretory profile (SASP) that has been described in senescent non-lymphoid cells. There was a significant correlation between the accumulation of these cells and the extent of systemic inflammation, suggesting that they are involved in the inflammatory response in this disease. Furthermore, these cells expressed high level of the skin homing receptor CLA and there was a highly significant correlation between the number of these cells in the circulation and the size of the Leishmania-induced lesions in the skin. Collectively our results suggest that extensive activation during the early stages of leishmaniasis drives the senescence of T cells with the propensity to home to the skin. The senescence-related inflammatory cytokine secretion by these cells may control the infection but also contribute to the immunopathology in the disease.

Detection of autonomic dysfunction in hemodialysis patients using the exercise treadmill test: the role of the chronotropic index, heart rate recovery, and R-R variability.

OBJECTIVE: To evaluate the ability of different parameters of exercise treadmill test to detect autonomic dysfunction in hemodialysis patients. METHODS: Cross-sectional study involving hemodialysis patients and a control group. Clinical examination, blood sampling, echocardiogram, 24-hour Holter, and exercise treadmill test were performed. A ramp treadmill protocol symptom-limited with active recovery was employed. RESULTS: Forty-one hemodialysis patients and 41 controls concluded the study. There was significant difference between hemodialysis patients and controls in autonomic function parameters in 24h-Holter and exercise treadmill test. Probability of having autonomic dysfunction in hemodialysis patients compared to controls was 29.7 at the exercise treadmill test and 13.0 in the 24-hour Holter. Chronotropic index, heart rate recovery at the 1st min, and SDNN at exercise were used to develop an autonomic dysfunction score to grade autonomic dysfunction, in which, 83% of hemodialysis patients reached a scoring ≥2 in contrast to 20% of controls. Hemodialysis was independently associated with either altered chronotropic index or autonomic dysfunction scoring ≥2 in every tested model (OR=50.1, P=0.003; and OR=270.9, P=0.002, respectively, model 5). CONCLUSION: The exercise treadmill test was feasible and useful to diagnose of the autonomic dysfunction in hemodialysis patients. Chronotropic index and autonomic dysfunction scoring ≥2 were the most effective parameters to differentiate between hemodialysis patients and controls suggesting that these variables portrays the best ability to detect autonomic dysfunction in this setting.