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In equatorial Brazil, the association of Burkitt lymphoma and Epstein–Barr virus manifests at high rates. Here, we report, for the first time, amplifications of aurora kinase genes (AURKA/B) in a patient with a history of periodontal abscess and the presence of a remaining nodule, diagnosed with Burkitt lymphoma and Epstein–Barr virus, and /HIV positive. The patient was a 38-year-old man who presented with a 2-week-old severe jaw pain and a 3-day-old severe bilateral headache. He had a history of human papilloma virus. Interphase FISH analysis showed AURKA and AURKB amplification. The patient’s condition worsened, progressing to death a month after the initial care. Changes in the MYCC and AURKA pathways are directly associated with genomic instability. Thus, MYCC rearrangements and higher expression of AURKA/B may be associated with therapy resistance, highlighting the importance of AURKA/B evaluation in Burkitt lymphoma.

One of the biggest drawbacks in endodontic filling is the problem of insufficient root sealing,due to the microleakage of bacteria into the canal. The objective of the research was to carry out a narrative review of the characteristics of the use of methylene blue as an evaluator of microleakage in studies that compared the quality of root sealing with different endodontic filling techniques. The research method used was literature review. Methylene blue was used in experimental in vitro studies, which compared filling techniques such as lateral condensation, cold injectable guttapercha, thermomechanics, among others, the sealed dental pieces were immersed in a 1% methylene blue dye at 5% concentration. This procedure allowed reevaluating the samples in different periods of time. In conclusion, for endodontic filling penetration testing, methylene blue is an easy-to-use and reliable option. Uno de los mayores inconvenientes en la obturación endodóntica es el problema del selladoradicular insuficiente, debido a la microfiltración de bacterias hacia el conducto. El objetivo de la investigación fue realizar una revisión narrativa de las características del empleo del azul de metileno como evaluador de microfiltraciones en estudios que compararon la calidad del sellado radicular con distintas técnicas de obturación endodóntica. El método de investigación empleado fue de revisión de la literatura. El azul de metileno fue utilizado en estudios experimentales in vitro, los cuales compararon técnicas de obturación como la condensación lateral, gutapercha inyectable en frío, termomecánica, entre otras. Las piezas dentarias selladas se sumergieron en un tinte de azul de metileno de 1% al 5% de concentración. Este procedimiento permitió reevaluar las muestras en distintos periodos de tiempo. En conclusión, para realizar pruebas de penetración de empastes endodónticos, el azul de metileno es una opción fácil de emplear además de confiable.

SUMMARY: The rabbit is considered an ideal animal model for studies that describe abnormalities in the testicles due to the similar morphogenetic mechanisms of sexual development and diseases commonly found in humans. The aim of this study was to determine the male sexual differentiation of the New Zealand rabbit (Oryctolagus cuniculus) through development. The gestational age was estimated and classified as 9, 12, 14, 16, 18, 20, 23 and 28 gestational days. The morphological and sexual determination were performed by histological analysis of the reproductive tract in the embryos and fetuses (9-28 days) as well as by immunohistochemistry- Desert hedgehog-Dhh- (testis-specific protein on Y chromosome- 16, 20, 23 days and adult rabbits). Gonads were observed from the 14th day in an undifferentiated stage and with homogeneous aspect. Sexual differentiation was observed from the 16th day with presence of cells forming gonadal cords and Dhh+ cells in the gonadal parenchyma. From the 18th gestational day testicular cords were observed, which evolved into organized seminiferous tubules. The formation of the efferent ducts and ductus deferens and epididymis was observed on the 20th and 23rd days, respectively. The differentiation of the external genitalia occurred from the 23rd days from the anogenital distance and was identified to identify the penile structures. In summary, the features of the sexual differentiation were determined by observation of the Dhh+ protein in embryos from the 16th day to adulthood, and the morphological particularities observed from the 18th gestational day, determined by differentiation of the external genitalia from the 23rd day.

A 43-years-old Brazilian woman, Caucasian, premenopausal, was attended with a history of lower abdominal pain, distension, and bleeding. Pelvic and transvaginal ultrasound revealed an enlarged uterus with a large, well-defined, uniformly hyperechoic lesion. The patient underwent total hysterectomy and the specimen was sent for anatomopathological evaluation. The histopathological analyses revealed a leiomyoma with extensive cystic degeneration and atypical characteristics, the immunohistochemical study confirmed the benignity of the case. The finding of atypical leiomyoma with cystic degeneration is rare and should be carefully evaluated to exclude malignant diseases. RESUMEN Mujer brasileña de 43 años, caucásica, premenopáusica, fue atendida con antecedentes de dolor abdominal bajo, distensión y menorragias. La ecografía pélvica y transvaginal reveló un útero agrandado con una lesión grande, bien definida y uniformemente hiperecoica. La paciente fue sometida a histerectomía total y la pieza fue enviada para evaluación anatomo-patológica. Los análisis histopatológicos revelaron un leiomioma con degeneración quística extensa de características atípicas y la inmunohistoquímica confirmó la benignidad del caso. El hallazgo de un leiomioma atípico con degeneración quística es raro y debe evaluarse cuidadosamente para descartar enfermedades malignas. RESUMO Mulher brasileira, 43 anos de idade, caucasiana, na pré-menopausa, foi atendida devido a história de dor em abdômen inferior, distensão e sangramento. A ultrassonografia pélvica e transvaginal revelou útero aumentado com grande lesão hiperecoica, bem definida e uniforme. A paciente foi submetida à histerectomia total, e a amostra foi enviada para avaliação anatomopatológica. A análise histopatológica revelou quadro de leiomioma com degeneração cística extensa e características atípicas; o estudo imuno-histoquímico confirmou a benignidade do caso. O achado de leiomioma atípico com degeneração cística é raro e deve ser cuidadosamente avaliado para excluir doenças malignas.

Objective: To report an unusual case of oral hairy polyp (HP) and review the literature, providing epidemiological, clinical and histopathological information on this disease. Case description: A 12-year-old male patient was referred to a Stomatology department with a nodule in the posterior midline of the tongue. The patient did not know exactly when it arose or whether it had grown since then. Clinical exam revealed a bulky and mobile pedunculated mass lesion on the dorsum of the tongue, with a diameter of approximately 1 cm. The patient’s mother reported no previous health problem. An excisional biopsy was performed, the surgical specimen was sent for anatomopathological analysis, and the findings were compatible with the diagnosis of HP. Comments: Hairy polyp is a rare lesion, especially in the oral region. The literature search revealed only 10 case reports of oral HP published between January 1999 and January 2019, and they revealed a predominance of the disease in female newborns. Two uncommon facts were presented in this case: the patient was male and diagnosis was made at 12 years old. RESUMO Objetivo: Relatar um caso incomum de pólipo piloso (PP) oral e revisar a literatura para trazer informações epidemiológicas, clínicas e histopatológicas acerca da doença. Descrição do caso: Paciente do sexo masculino, 12 anos de idade, encaminhado ao Departamento de Estomatologia com nódulo na região posterior de linha média da língua. O paciente não soube relatar quando surgiu a lesão e se ela havia crescido desde então. O exame clínico revelou massa pedunculada, volumosa e móvel no dorso da língua, medindo aproximadamente 1,0 cm de diâmetro. A mãe do paciente relatou que ele nunca havia tido nenhum problema de saúde anterior. Foi realizada biópsia excisional e o material foi enviado para análise anatomopatológica, sendo os achados compatíveis com o diagnóstico de PP. Comentários: O pólipo piloso é uma lesão rara, especialmente na região oral. A pesquisa bibliográfica revelou apenas dez relatos de casos de PP oral, publicados entre janeiro de 1999 e janeiro de 2019, sendo observada predominância da doença em recém-nascidos do sexo feminino. Dois fatos incomuns ocorreram neste caso: tratava-se de um paciente do sexo masculino e o diagnóstico se deu aos 12 anos de idade.