RESUMO Introdução: A lesão central de células gigantes (LCCG) é uma alteração óssea de etiologia desconhecida e comportamento clínico variado, que pode acometer os maxilares. Objetivo: Analisar radiografias provenientes de pacientes portadores de LCCG submetidos à corticoterapia intralesional, visando propor a quantificação de ganho ósseo pós-tratamento. Métodos: Foram selecionados 16 pacientes com diagnóstico microscópico de LCCG cadastrados nos arquivos do Hospital Batista Memorial de Fortaleza, Ceará, Brasil. Trinta e duas radiografias (16 iniciais e 16 finais) foram avaliadas por meio da média dos valores de pixels da região afetada pela afecção antes e após o protocolo completo de aplicação intralesional de corticoide (seis aplicações em intervalos quinzenais de triancinolona hexacetonida). Resultados: Dos pacientes submetidos à pesquisa, 14 (87,5%) apresentaram aumento da média dos valores de pixels - dado entendido como ganho ósseo - nas radiografias após tratamento com injeções intralesionais; apenas dois (12,5%) não apresentaram esse quadro. A comparação das médias dos valores de pixels entre os lados teste inicial e final mostrou p = 0,0027, o que foi estatisticamente significante, comprovando o aumento de densidade nas regiões estudadas. Conclusão: As ferramentas de análise de valores de pixels mostraram-se úteis na quantificação de ganho ósseo em pacientes submetidos à corticoterapia intralesional, devendo tais ferramentas ser mais exploradas e utilizadas no decorrer do tratamento como auxiliares na avaliação de sua eficácia.

ABSTRACT Introduction: The central giant cell granuloma (CGCG) is a bone alteration of unknown etiology that can affect the jaws and presents varied clinical behavior. Objective: To analyze radiographs from patients with CGCG submitted to intralesional corticosteroids, in order to quantify bone gain after treatment. Methods: Sixteen patients with the microscopic diagnosis of CGCG were selected from the Batista Memorial Hospital, in Fortaleza, Ceará, Brazil. Thirty-two radiographs (16 initial and 16 final) were evaluated by the mean pixel values of the affected region before and after the complete corticosteroid intralesional application protocol (six applications in biweekly intervals of triamcinolone hexacetonide). Results: Of the patients submitted to the study, 14 (87.5%) presented a mean increase in the values of pixels, understood as bone gain, in the radiographs after treatment with intralesional injections, and two (12.5%) did not present it. The comparison of the mean pixel values between the initial and final test sides showed p = 0.0027, which was statistically significant, confirming the increase in density in the studied regions. Conclusion: The tools for analysis of pixel values were useful in the quantification of bone gain in patients submitted to intralesional corticosteroid therapy, and these tools should be further explored and used during treatment as auxiliary methods in the evaluation of its efficacy.

RESUMO Relato de caso de lesão central de células gigantes (LCCG) em uma paciente do sexo feminino, 32 anos de idade, que exibiu aumento de volume assintomático em região mandibular e apresentou integridade da mucosa alveolar adjacente, sendo submetida a tratamento conservador. Os exames de imagem evidenciaram lesão radiolúcida e multilocular com deslocamento e discreta reabsorção radicular do 34 e 35. Foi realizada biópsia incisional com diagnóstico final de LCCG. A paciente foi submetida a aplicações quinzenais de hexacetonido de triancinolona, não apresentando recidiva e exibindo reintegração óssea. O tratamento de lesões extensas com injeções intralesionais de corticoides tem mostrado efeitos satisfatórios.

ABSTRACT Case report of central giant cell lesion (CGCL) in a 32-year-old female patient, who exhibited asymptomatic increase in mandible volume and integrity of the adjacent alveolar mucosa, she was submitted to conservative treatment. The imaging exams showed radiolucent and multilocular lesion with displacement and discrete root resorption of the teeth 34 and 35. An incisional biopsy was performed and the final diagnosis of CGCL was established. The patient was submitted to biweekly applications of triamcinolone hexacetonide, showing no recurrence and exhibiting bone reintegration. Treatment of extensive lesions with intralesional corticosteroid injections has shown satisfactory effects.

OBJECTIVE: Experimental studies on lung preservation have always been performed using animal models. We present ex vivo lung perfusion as a new model for the study of lung preservation. Using human lungs instead of animal models may bring the results of experimental studies closer to what could be expected in clinical practice. METHOD: Brain-dead donors whose lungs had been declined by transplantation teams were used. The cases were randomized into two groups. In Group 1, Perfadex®was used for pulmonary preservation, and in Group 2, LPDnac, a solution manufactured in Brazil, was used. An ex vivo lung perfusion system was used, and the lungs were ventilated and perfused after 10 hours of cold ischemia. The extent of ischemic-reperfusion injury was measured using functional and histological parameters. RESULTS: After reperfusion, the mean oxygenation capacity was 405.3 mmHg in Group 1 and 406.0 mmHg in Group 2 (p = 0.98). The mean pulmonary vascular resistance values were 697.6 and 378.3 dyn·s·cm-5, respectively (p =0.035). The mean pulmonary compliance was 46.8 cm H20 in Group 1 and 49.3 ml/cm H20 in Group 2 (p =0.816). The mean wet/dry weight ratios were 2.06 and 2.02, respectively (p=0.87). The mean Lung Injury Scores for the biopsy performed after reperfusion were 4.37 and 4.37 in Groups 1 and 2, respectively (p = 1.0), and the apoptotic cell counts were 118.75/mm² and 137.50/mm², respectively (p=0.71). CONCLUSION: The locally produced preservation solution proved to be as good as Perfadex®. The clinical use of LPDnac may reduce costs in our centers. Therefore, it is important to develop new models to study lung preservation.