Analysis of the use of isotretinoin as an adjuvant in rhinoplasty.

BACKGROUND: Isotretinoin has been used in the treatment of acne for decades through the reduction of sebaceous secretion. There are reports in the literature that isotretinoin may be associated with decreased skin thickness, especially in patients with thick nasal skin for whom rhinoplasty can be more challenging. The objective of this study was to quantify, through ultrasonography, the effect of the use of oral isotretinoin in patients undergoing rhinoplasty, pre- and postoperatively. METHODS: Twenty-four patients participated in this randomized, single-blind controlled pilot clinical trial. The intervention group used oral isotretinoin (20 mg/day) for 2 months before rhinoplasty and for 4 months after. Both groups underwent rhinoplasty in the same plastic surgery department and were submitted to high-frequency (22 MHz) ultrasound evaluation of the epidermis and dermis on the nasal dorsum, nasal tip, and left nose wing at the beginning of the study and 6 months after rhinoplasty, with the aim of assessing changes in skin thickness. RESULTS: Six months after rhinoplasty, a statistically significant reduction was observed in the thickness of the epidermis and dermis of the nasal dorsum and left nose wing, as well as of the epidermis of the nasal tip, but only in the intervention group. The results of the satisfaction questionnaire were better after rhinoplasty in both groups, with no statistical difference between them regarding the specific questions; however, the intervention group had significantly higher satisfaction scores than the control group. CONCLUSIONS: Isotretinoin was effective in reducing the thickness of the skin covering the nose of the evaluated sites.

Species of Paraclius Loew (Diptera: Dolichopodidae) with bi-lamellate antennal stylus: new combination, new synonym, and two new species.

The species of Paraclius Loew with bi-lamellate arista-like stylus are revised and P. americanus (Schiner, 1868) comb. nov. is transferred from Tachytrechus Haliday and regarded as the senior synonym of P. diplacocerus Capellari, 2013 syn. nov. In addition, two new species with similar antennal morphology are described and illustrated from Brazil: P. bilamellatus sp. nov. (States of Espírito Santo and Goiás) and P. vulcanoae sp. nov. (State of São Paulo). A distribution map and a key to the males of known species of Paraclius with bi-lamellate arista-stylus are provided.

Effects of time-dependent degradation and freezing on biomechanical properties of healthy bovine jejunum / Efeitos da degradação dependente do tempo e do congelamento sobre as propriedades biomecânicas do jejuno bovino saudável

Degradation of bovine small intestine and respective effects on biomechanics have not been described to date. Biomechanical testing of intestinal tissues is often carried out within a few hours of donor death and tissue deterioration is not accounted for. Freezing is efficient for the preservation of several tissues; however, it may cause cellular damage. This study investigated the morphologic and biomechanical changes of bovine jejunum at different postmortem moments. Effects of freezing and thawing on morphology and biomechanical behavior were also examined. Macroscopic changes were first noted within eight hours of death. At this time, histologic changes also started to set in, and biomechanical tests revealed lower bursting pressure (203.10±46.14mmHg). At 12 hours, tissue rearrangement was noted, and bursting pressure increased (238.43±31.04mmHg). A second drop in pressure was detected at 18 hours (235.20±38.21mmHg), followed by a progressive drop until the end of the experimental period. Histologic changes revealed progressive deterioration. Mechanical resistance did not differ between thawed and fresh specimens. It was concluded that bovine jejunal specimens retain biomechanical resistance up to 6 hours after death. Freezing and thawing did not affect the mechanical resistance of the intestinal wall in this experimental model.

A degradação do intestino delgado de bovinos e seu efeito biomecânico não são descritos na literatura. Trabalhos que envolvem a biomecânica intestinal realizam os ensaios em poucas horas após o óbito dos doadores, sem avaliação de seu estado de deterioração. O congelamento é eficiente na conservação de vários tecidos, porém pode provocar danos em nível celular. Este estudo teve por objetivo avaliar a degradação morfológica e biomecânica do jejuno de bovinos em diferentes tempos post mortem. O efeito do congelamento e do descongelamento sobre essas características também foi avaliado. As primeiras alterações macroscópicas foram observadas oito horas após o óbito. No mesmo momento, se iniciaram as alterações histológicas e a menor pressão suportada ao teste biomecânico (203,10±46,14mmHg). A partir de 12 horas, o tecido sofreu um rearranjo, suportando maior pressão (238,43±31,04mmHg). Uma segunda queda foi detectada após 18 horas (235,20±38,21mmHg), seguida de redução progressiva até o término do experimento. As lesões histológicas foram progressivas e graduais. As amostras testadas após descongelamento não apresentaram diferença estatística quanto à resistência mecânica em comparação com os espécimes frescos. Concluiu-se que as amostras mantêm sua resistência biomecânica até 6 horas após o óbito. Também se mostrou que o congelamento e o descongelamento, nas condições testadas, não alteraram a resistência mecânica da parede intestinal.

Hidden in the dung: first record of Maculantrops hirtipes () (Diptera, Sphaeroceridae) from Brazil / Escondido no esterco: primeiro registro de Maculantrops hirtipes () (Diptera, Sphaeroceridae) do Brasil

Abstract We recorded for the first time the lesser dung fly Maculantrops hirtipes (Macquart, 1844) from Brazil, state of Rio Grande do Sul. Twenty-five specimens were reared from the dung of Myocastor coypus (Molina, 1782), this is the first record of the feeding substrate for the genus Maculantrops and the second only for the Archiborborinae. In addition, we describe the puparium, provide an updated distribution map and additional photographs of the species.

Resumo Registramos pela primeira vez a mosca-do-esterco Maculantrops hirtipes (Macquart, 1844) no Brasil, no estado do Rio Grande do Sul. Vinte e cinco espécimes foram obtidos em amostras fecais de Myocastor coypus (Molina, 1782). Este é o primeiro registro do substrato alimentar para o gênero Maculantrops e o segundo apenas para subfamília Archiborborinae. Além disso, descrevemos o pupário, fornecemos um mapa de distribuição atualizado e fotografias adicionais da espécie.

Unusual sexually dimorphic head morphology in Lauxaniidae (Diptera: Lauxanioidea)a new species of the genus Trivialia Malloch from Peru.

A new species of the New World genus Trivialia Malloch from Peru is described and illustrated, along with discussion of unusual head morphology in Lauxaniidae. This new species represents an odd case where only a single known species in an otherwise non-dimorphic genus displays extreme sexual dimorphism.

Review of Brazilian species of Syneches Walker (Diptera, Hybotidae, Hybotinae), with description of ten new species.

We increase the knowledge on the taxonomy of Brazilian Syneches describing 10 new species: S. amorimi sp. nov., S. barrettoi sp. nov., S. digitatus sp. nov., S. fasciatus sp. nov., S. flaviscutellatus sp. nov., S. fuscus sp. nov., S. nordestino sp. nov., S. plaumanni sp. nov., S. sinclairi sp. nov., and S. smithi sp. nov., and redescribing three species: S. catarinae Smith, 1962, S. luteus (Wiedemann, 1830) and S. tomentosus Smith, 1962. Syneches ruficollis (Walker, 1852) is proposed as a nomen dubium since the type is lost and the original description does not allow identification. An identification key, high-resolution images of relevant characters, short diagnoses and maps of geographic records for all 34 Brazilian species now included in the genus are provided, as well as a checklist for the South American species of Syneches.

A remarkable new species of Micropeza Meigen (Diptera: Micropezidae) from Caatinga biome, Brazil.

We report for the first time the occurrence of genus Micropeza from Caatinga biome, through the description of M. chiroptera sp. nov. The new species is probably closely related to M. dactyloptera Harterreiten-Souza, Sujii Pujol-Luz, 2014 by the finger-shaped projection on costal vein. A key of Micropeza species with a finger-shaped projection on costal vein and a distribution map of these species are provided.

Review of the Neotropical genus Pseudosympycnus (Diptera: Dolichopodidae), with description of six new species from Brazil and Peru.

The Neotropical stolidosomatine genus Pseudosympycnus Robinson (Diptera: Dolichopodidae) is reviewed and contains 12 species, including six new species that herein are described and illustrated: P. araza sp. nov. (Peru, department of Cusco), P. bickeli sp. nov. (Brazilian States of Pará and Roraima), P. latitibia sp. nov. (Brazilian States of Minas Gerais, Rio de Janeiro and São Paulo), P. maroaga sp. nov (Brazilian State of Amazonas), P. robinsoni sp. nov. (Brazilian State of Acre), and P. sehnali sp. nov. (Brazilian State of Amazonas). All species are diagnosed, male and female terminalia of the genus are illustrated for the first time, high-resolution images of relevant characters are presented and an identification key to males is provided.

Chvalaea yolkamini sp. nov. (Diptera: Hybotidae), the first Mexican species of genus discovered on Instagram.

A new species of Chvalaea Papp Földvári, 2002 is discovered after a photo on a social network and later collected in nature. Chvalaea yolkamini sp. nov. is described and illustrated here. In addition, for the first time we describe eggs with scanning electron microscopy and report on adult hunting behavior.

Pneumoretroperitoneum, pneumomediastinum and subcutaneous emphysema after endoscopic submucosal dissection of a rectal lateral spreading tumor / Pneumorretroperitônio, pneumomediastino e enfisema subcutâneo após dissecção endoscópica da submucosa de lesão retal de crescimento lateral

Introduction: Endoscopic submucosal dissection (ESD) is an already established procedure in the treatment of gastric and esophageal cancer in its early stages. Colorectal lesions, initially approached by endoscopic mucosal resection en bloc or in fragments, are the current focus for submucosal approach, especially for superficial lateral spreading tumor of 20 mm-diameter. The experience of Japanese centers, which are reference in therapeutic endoscopy, demonstrates reduction in the rate of disease recurrence with this approach and, according to specific histopathological criteria, may avoid colectomy in some cases of malignant neoplasia. Case report: The patient was 50-year-old female. She underwent endoscopic submucosal dissection of a rectal lateral spreading tumor measuring 50 mm, located 8 cm from the anal margin. The procedure was performed without major complications, with just two points for muscle layer detachment, without gross perforation and closed with metal clips. However, the patient developed air leakage to the peritoneum, retroperitoneum, mediastinum and subcutaneous tissue, being only treated with clinical procedures and without additional intervention. Conclusion: It is vital to know and be able to apply the technique of ESD, in addition to addressing its complications, since despite the numerous benefits compared to surgery, ESD can result in serious outcomes. (AU)

Introdução: A dissecção endoscópica da submucosa (ESD) já é procedimento consagrado no tratamento do câncer gástrico e esofagiano em suas fases precoces. As lesões colorre-tais, inicialmente abordadas por mucossectomia, em bloco ou em fragmentos, são o foco atual para a abordagem submucosa, principalmente para os tumores de crescimento lateral superficial a partir de 20 mm de diâmetro. A experiência de centros japoneses, referências em endoscopia terapêutica, demonstram redução no índice de recidiva da doença com esta abordagem e, segundo critérios histopatológicos específicos, podem evitar uma colectomia em alguns casos de neoplasia maligna. Relato de caso: Trata-se de paciente de 50 anos, submetida à dissecção endoscópica da submucosa de lesão de crescimento lateral, com 50 mm, localizada no reto, a 8 cm da margem anal. O procedimento foi realizado sem maiores intercorrências, com apenas dois pontos de afastamento da muscular, sem perfuração grosseira, fechados com clipe. Entretanto, a paciente evoluiu com escape aéreo para peritônio, retroperitônio, mediastino e subcútis, sendo tratada sem intervenção adicional, apenas com manejo clínico. Conclusão: É de fundamental importância conhecer e saber aplicar a técnica da ESD, além de abordar suas complicações, uma vez que, mesmo repleta de benefícios em relação à cirurgia, ela pode apresentar desfechos graves. (AU)