Sample records for sebaceous glands
from WorldWideScience.org

Sample records 1 - 8 shown.



1

Cisto dermóide simulando neoplasia retro-retal/ Dermoid cyst simulating retro-rectal neoplasia

Carvalho, Erlon de Ávila; Pontinha, Tatiane de Fátima Baco Saraiva; Oliveira, Jackeline Ribeiro; Braga, Eustáquio de Carvalho; Baldim, José Ademar
2007-09-01

Resumo em português Cisto dermóide é uma formação tumoral constituída por um enclausuramento epidérmico contendo folículos pilosos, glândulas sebáceas e localizadas geralmente no pescoço. Resumo em inglês Dermoid cyst is a tumor formation composed of an epidermal enclousure which contains pilous follicle and sebaceous glands. Generally it is located on the neck.

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2

Descrição histológica do escroto de caprinos nativos do Estado do Piauí, segundo o grau de bipartição escrotal/ Scrotum histological description in native goats from Piaui State, according to scrotal bipartition level

Nunes, Aline Soares; Cavalcante Filho, Miguel Ferreira; Machado Júnior, Antonio Augusto Nascimento; Silva, Ana Lúcia Abreu; Conde Júnior, Airton Mendes; Souza, José Adalmir Torres; Carvalho, Maria Acelina Martins
2010-08-01

Resumo em português Esta pesquisa teve por objetivo avaliar as características histológicas do escroto de caprinos com diferentes graus de divisão escrotal. Foram utilizados 15 caprinos distribuídos em três grupos (GI, escroto não bipartido; GII, escroto bipartido até 50% do comprimento testicular; e GIII, escroto bipartido superior a 50% do cumprimento do testículo). Fragmentos do escroto foram submetidos a processamento histológico e analisados em microscópio de luz. Na pele do e (mais) scroto, a epiderme apresentava-se composta por epitélio pavimentoso estratificado queratinizado, organizado nos estratos basal, espinhoso, granuloso e córneo. Sua espessura, independentemente da divisão escrotal, aumentou gradativamente da região proximal à distal, sendo mais espessa nos caprinos do GIII (68,91µm) e mais fina na região da rafe escrotal do grupo GI. A derme apresentava-se escassa em tecido adiposo e possuía uma maior quantidade de glândulas sudoríparas apócrinas nos animais do GIII (18,12GS mm-2), quando comparado com os do GI (16,14GS mm-2) e GII (14,82GS mm-2). Com relação às glândulas sebáceas, não foi encontrada diferença numérica significativa entre os animais pesquisados. Concluiu-se que os caprinos que apresentam bipartição escrotal mais acentuada (GIII) podem apresentar uma maior produção de suor, pois contém maior quantidade de glândulas sudoríparas no escroto, fato que pode favorecer a perda de calor por evaporação, colaborando no processo de termorregulação testicular. Resumo em inglês Among male goats in tropical regions, a bipartition in scrotum happens frequently Studies have shown that goats with bigger accented division in scrotum have reproductive advantages in relation to those that had not presented this characteristic, giving them a better thermoregulation for testis in the animals with bipartite scrotum. This research aimed to evaluate histological characteristics of the scrotum, in 15 goats, distributed in three groups, according to scrotal c (mais) onfiguration (GI, unique scrotum; GII, scrotum bipartite up to 50% of the testicular length; GIII, scrotum bipartite upper than 50%). It was removed fragments of the organ and they were processed, according to histological routine and analyzed in light microscope. The scrotum skin is constituted of epidermis and dermis, and the epidermis is formed by stratified keratinizing epithelium, organized in basale, spinosum, granulosum, and corneum stratums. The epidermis width, independent of the scrotum configuration, increased gradually from the proximal to the distal region, being wider (average = 68,91µm) in GIII's animals. In the medial region of bipartite scrotum the epidermis showed to be thinner than on the raphe in animals of unique scrotum. The dermis, rare in fat tissue, showed a greater quantity of sweat apocrine glands in the animal of GIII, average of 18,12GS mm-2, while in the GI's, 16,14GS mm-2 and GII, 14,82GS mm-2, suggesting a greater production of sweat that could favor the lost of heat by evaporation. About the number of sebaceous glands, there was no statistic difference among the groups.

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3

Morfologia e histoquímica da pele de ratas hipotireóideas castradas e não castradas/ Morfology and histochemistry of the skin in hypothyroid castrated and intact rats

Ferreira, E.; Serakides, R.; Nunes, V.A; Gomes, M.G.; Silva, C.M.; Ocarino, N.M.; Ribeiro, A.F.C.
2003-02-01

Resumo em português Foram estudadas as alterações cutâneas de ratas Wistar adultas castradas e não castradas, mantidas em estado hipotireóideo por 120 dias. Dois grupos eutireóideos, um castrado e outro não castrado, serviram de controle. Secções da pele abdominal ventral e torácica dorsal foram coradas pelas técnicas de HE, PAS, azul de alcian (alcian blue), picro-sirius red-luz polarizada e Verhoeff. Adelgaçamento da epiderme, atrofia de glândulas sebáceas, redução parcial (mais) ou total de fibras elásticas e do colágeno do tipo III da derme caracterizaram tanto o hipotireoidismo quanto a castração. Retardo no crescimento dos folículos pilosos e hiperceratose foram vistos apenas na deficiência dos hormônios tireoidianos, independente do estado funcional das gônadas. A associação hipotireoidismo e castração caracterizou-se por adelgaçamento da epiderme da região abdominal ventral e espessamento e aumento da celularidade na região torácica dorsal, com derme adelgaçada e desprovida de fibras elásticas e de colágeno do tipo III. Conclui-se que a deficiência dos hormônios sexuais ou tireoidianos altera todos os componentes da pele e que as lesões são agravadas na associação hipotireoidismo-castração. Resumo em inglês The cutaneous alterations of castrated and intact female Wistar rats kept under a hypothyroidism state for 120 days were studied. Two euthyroid groups, one castrated and other intact, served as controls. Ventral abdominal and dorsal thoracic skin sections were stained by HE, PAS, alcian blue, picro-sirius red-polarized light and Verhoeff. Epidermis and sebaceous glands atrophy, partial or total reduction of elastic fibrils and type III dermal collagen were observed in bot (mais) h hypothyroidism and castration. Delay in hair follicle growth and hyperkeratosis were only observed when deficiency of thyroid hormones was present, independent of gonadal function. The association of hypothyroidism and castration was characterized by ventral abdominal epidermis atrophy, thickening and hyperplasia of dorsal thoracic epidermis, dermis atrophy with loss of elastic fibrils and type III collagen. In conclusion, ovarian steroids or thyroid hormones deficiency modifies all the components of the skin and that the injuries are aggravated in the association hypothyroidism-castration.

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4

Síndrome da displasia ectodérmica anidrótica no período neonatal - relato de caso/ Anhidrotic ectodermal dysplasia syndrome in the neonatal period - case report

Araújo, Breno F. de; Nora, Adelar B.; Marcon, Márcia Z.; Medeiros, Daniel B. de; Araújo, Eduardo S. de; Fachinello, Fernanda Z.
2001-02-01

Resumo em português Objetivo: Descrever uma síndrome rara em crianças e alertar os pediatras sobre a consideração desta patologia no diagnóstico diferencial de febre de origem obscura no recém-nascido. Métodos: Relato de caso de displasia ectodérmica anidrótica em um RN de dez dias, internado na UTI neonatal do Hospital Geral de Caxias do Sul, apresentando episódios recorrentes de hipertermia desde os primeiros dias de vida. Resultados: O paciente apresentava mucosas ressecadas, pe (mais) le seca e descamativa e hipertermia. Foi realizada biópsia de pele na região dorsal do paciente, verificando-se ausência de estruturas glandulares écrinas e sebáceas e hipoplasia de estruturas foliculares. O paciente está em acompanhamento ambulatorial, recebendo tratamento sintomático. Conclusões: A síndrome de displasia ectodérmica anidrótica é rara, mas deve ser considerada no diagnóstico diferencial de recém-nascidos que apresentam episódios febris recorrentes. Durante o período neonatal as manifestações clínicas da doença são sutis e inespecíficas, tornando-se mais aparentes após alguns meses de vida. Não existe tratamento específico e definitivo para essa síndrome. Resumo em inglês Objective: To describe a rare syndrome among children and to urge pediatricians to consider in considering such diagnosis when investigating fever of unknown etiology among neonates. Methods: Case report of Anhidrotic Ectodermal Dysplasia Syndrome in a ten day old newborn hospitalized in a NICU at Hospital Geral de Caxias do Sul. The child presented recurrent episodes of fever since the firsts days of life. Results: The patient presented dry mucous, dry skin and fever. Sk (mais) in biopsy was performed in his back region. A lack of sweat and sebaceous glands as well as hypoplasia of follicular structures were identified. The patient is being monitored at the clinic, receiving supportive treatment. Conclusion: Anhidrotic ectodermal dysplasia syndrome is a rare disorder that must be considered when investigating newborns with recurrent episodes of fever. During the neonatal period, the clinical manifestations of the disease are subtle and unspecific. Such findings become more visible after a few months of life. There is no definitive treatment for this syndrome.

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5

Recidiva de cisto dermoide congênito de localização paramediana/ Recurrence of congenital dermoid cyst of paramedian location

Utumi, Estevam Rubens; Zambon, Camila Eduarda; Pedron, Irineu Gregnanin; Machado, Gustavo Grothe; Rocha, André Caroli
2010-09-01

Resumo em português INTRODUÇÃO: O cisto dermoide é um cisto de desenvolvimento incomum na face e envolve mais frequentemente o assoalho bucal. A maioria das lesões ocorre em adultos jovens, com ligeira predileção pelo gênero masculino. As lesões neonatais e em crianças são extremamente raras. Manifesta-se como tumefação flutuante, assintomática e de crescimento lento e progressivo, atingindo dimensões variadas. Sua cápsula pode conter um ou mais anexos cutâneos, como glândul (mais) as sebáceas, pêlos ou unhas. O tratamento é cirúrgico, através de enucleação, sendo sua recidiva incomum. O aspecto clínico, histopatológico, diagnóstico diferencial e tratamento de um caso de cisto dermoide congênito, e de sua recidiva, são discutidos pelos autores. Palavra chave: cisto dermoide; soalho de boca; recorrência. Resumo em inglês INTRODUCTION: The dermoid cyst is a cyst of unusual development in the face and more often involves the mouth floor. Most injuries occur in young adults with a slight predilection for males. Lesions in neonatal and children are extremely rare. It manifests as swelling floating asymptomatic and slow-growing and progressive, reaching dimensions. His capsule may contain one or more skin appendages such as sebaceous glands, hair or nails. The treatment is surgical, by enuclea (mais) tion, and its recurrence uncommon. The clinical appearance, histopathology, differential diagnosis and treatment of a case of congenital dermoid cyst, and its recurrence, are discussed by the authors.

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6

Infecções experimentaes na Leishmaniose visceral americana/ Experimental infections in american visceral leishmaniasis

Cunha, Aristides Marques da
1938-01-01

Resumo em português Passando em revista as experiencias de infecção que effectuamos e que acabamos de relatar, vemos que, as culturas isoladas de casos de Leishmaniose visceral americana quer do homem quer do cão, são capazes de infectar hamsters, rhesus e cães de maneira identica ao que acontece com as outras formas de Kala-Azar. Notamos ainda que a evolução da doença e as lesões observadas nos animaes assim infectados, se assemelham ao que tem sido observado nessa enfermidade apro (mais) ximando-a de maneira singular do Kala-Azar mediterraneo. É sobretudo no cão que a semelhança se torna mais patente. A infecção da pelle e as lesões por ella provocadas que observamos, não differem em nada das que tem sido descriptas na infecção natural do cão e já assignaladas tambem na infecção experimental desse animal, embora de maneira menos completa do que fazemos agora aqui. As lesões oculares com formação de placas de keratite, a infeccção massiça do intestino nos casos fataes de infecção e até mesmo as lesões do figado descriptas por Adler como peculiares á infecção experimental, (infiltração em torno da veia central do lobulo) constituem outros tantos caracteres que mostram a completa analogia entre as infecções do cão que obtivemos e as já observadas no Kala-Azar mediterraneo. Além disso, a presença de Leishmanias na pelle, as vezes em grande numero e a constancia dessa localisação parasitaria, vem mostrar que o cão apresenta as condições necessarias para desempenhar o papel de depositario de virus tal como acontece no Kala-Azar mediterraneo, tanto mais que é elle encontrado naturalmente infectado, nas regiões em que grassa a doença. Mas não é só a infecção do cão que mostra essa semelhança; nos outros animaes tambem se verifica o mesmo facto e até pequenos signaes, taes como a tumefacção das patas assignalada nos hamsters infectados com Leishmania infantum, foram tambem observados aqui. Por outro lado, a reacção de sôro-agglutinação, conforme mostramos em trabalho anterior, não permite a separação das especies do genero Leishmania, pois todas ellas, quando recentemente isoladas, possuem identica constituição antigenica, que se modifica depois, pela conservação longo tempo em cultura. É esse facto, que deu logar ás conclusões contradictorias a que chegaram os autores que se ocuparam do assumpto bem como os primeiros resultados que obtivemos. Deante de todos esses factos, nos julgamos autorizados a concluir como já fizemos anteriormente, que o agente da Leishmaniose visceral americana é identico á Leishmania infantum. Ao terminar, queremos deixar consignados nossos agradecimentos ao Dr. E. chagas, por ter posto a nossa disposição as culturas de Leishmania por elle isoladas, tornando possivel deste modo, a execução do presente trabalho. Resumo em inglês With cultures isolated from cases of american visceral leishmaniasis we succeeded in obtaining experimental infections in hamsters (Cricetus cricetus), rhesus monkeys (Macaca mullata) and dogs. Hamsters were infected with strains obtained from man and dogs, the intraperitoneal way having been always employed. When cultures recently isolated are used, infection is obtained practically in 100% of the animals inoculated. The first negative results obtained by us may be expla (mais) ined by the use of cultures isolated some time before (about 7 months 0 and which had lost already their virulence. In some cases external lesions are observed represented by alterations of the skin and swelling of the paws. The skin lesions are observed on the ventral surface and consist in depilation, erythema and exudation. The skin thus affected shows to be extremely friable, rupturing at the movements of the animal when hold. On post-mortem examination, besides the lesions pointed out, the animals present enlargement of the spleen. The parasites are very numerous in the spleen, liver, bone marrow, etc. The changed skin shows considerable hypertrophy of the epithelium with degeneration of the cells of the superficial layers, intensive infiltration of the derm by mononucleate cells full of parasites, and strong hyperemia. In rhesus monkey, we obtained until now, only one case of infection. The inoculation was made by the intraperitoneal way with cultures in Noeller's medium, isolated from a human case of visceral leishmaniasis, found in Chaco Argentino. About 8 months after the inoculation, the monkey was found in agony and was sacrified; the post-mortem examination showed that it was intensely infected. For infecting dogs, we employed young animals, 1 to 2 months old. The cultures were recently isolated (1 to 3 months) from man or dog. For the inoculation we used thick suspensions of flagellates from plate cultures by Mayer and Ray's method. The inoculations were carried out through the intraperitoneal way and renewed 3 to 4 times with intervals from 4 to 8 days. We observed an incubation period of 3 to 4 months when we used cultures obtained from dogs, and a period of 5 to 7 months, when employed human strains. Formerly, in order to verify the infection it, was used the liver puncture; later on we also examined the bone marrow removed by trepanation. We wish to emphasize the advantages derived from the examination of the bone marrow, as there the parasites are much more numerous than in the liver, thus making the examination easier. The infection shows itself in the animal by fever, anemia and emaciation at times attaining cachexia. Apart from this, skin lesions are observed represented by depilation, seborrhea, and even ulceration. In the dog A. we observed keratitis on both eyes, and in the dog C, diminution of vision nearly attaining complete blindness. What called our particular attention, was the infection of the skin. In this, parasites are always found in any region o fthe body, although presenting some elective sites such as the paws where the parasites first appear and where they generally are more numerous. At the beginning of the skin infection we see in the derm macrophages, containing parasites, generally 3 to 4, and arranged along the vascular tracts. With the exception of these macrophages, the skin looks nomral. The number of parasited macrophages increases gradually and then appear the changes of the skin here described. The main change observed is represented by infiltration of the derm by mononucleate cells. Such infiltration is mainly located around the pilo-sebaceous folliches. In other cases, the infiltation is located in the chorion. Finally, in certain cases of intense infiltration, it extends uniformly over the whole derm. The infiltration is sometimes constituted chiefly by parasited macrophages and this occurs mainly when the infiltration is not very intensive. When the infiltration becomes more intensive, the number of not parasited macrophages increases, and in cases of ulceration the parasited macrophages become very rare or entirely disappear. The four dogs experimentally infected which died either from the infection or from an intercurrent disease were all examined post-mortem. On the post-mortem examination, the macroscopical changes observed in a constant manner are not important and only consist in an enlargement of the spleen. In the dogA, we found keratitis already observed in the same living animal, and the intestine intensely congested with sanguinolent contents and the axillary and inguinal lymphatic glands enlarged and congested. Smears from the organs showed very numerous parasites, chiefly in the spleen, liver, bone marrow and lymphatic glands. In liver sections we observed the infiltration mainly located around or near by the intralobar vein a feature which already has been pointed out by Adler in the experimental infection of dog. Parasites were also found in Kupffer's cells, and a few parasited macrophages were observed in the porta-spaces as well as in the tissue of the lobule. The intestine of the same animal was intensely parasited, the Leishmaniae being located mainly in the mucous membrane, in infiltration cells located amongst Lieberkuehn's glands and some parasited macrophages could also be observed in the sub-mucosa. Mice as well as the rodents Dasyprocta agouti and Proechymis oris when inoculated, did not become infeced. From the exposed we may conclude that the experimental infections obtained, present a complete analogy with those described in the Mediterrean Kala-azar. On the other hand, the sero-agglutination test, as shown by us in a previous paper, allows no distinction of the species of Leishmania, as all the strains when recently isolated, have the same antigenic constitution which later on undergoes modifications when the Leishmaniae are preserved in culture for a long time. Thus, we feel authorized to conclude that the agent of the visceral american leishmaniasis is identical with L. infantum.

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7

Alterações dos folículos pilo-sebáceos em um caso de sindromo bolhoso do grupo pênfigo: presença de inclusões intranucleares das doenças por virus filtraveis

Gatti, Carlos; Torres, C. Magarinos; Boggino, Juan
1947-12-01

Resumo em português Tendo a oportunidade de estudar fragmentos de pele retirados de diversas regiões, algumas providas de abundante revestimento capilar, em um caso de autopsia de doente com sindromo bolhoso do grupo pênfigo, chamaram a nossa atenção as alterações histologicas dos folículos pilo-sebaceso, sôbre as quais não encontramos referencia especial na literatura que nos foi dado consultar. Resumo em inglês Several skin fragments were available for histological study some of them from hairy regions in a case of pemphigus vulgaris observed in Asunción, Paraguay, which came to autopsy. The lesions on the skin are similar to those described in "fogo selvagem", a subtype of pemphigus which is endemic and sometimes epidemic in South America. The hair follicle shows hyperplasia of the outer sheath (acanthosis), acantholysis, dyskeratosis as well as necrosis of epithelial cells, d (mais) ilatation of its mouth, loosening and loos of the hair. The first changes mentioned are more or less similar to those described in the epidermis. The striking finding, however, is the presence in some of them of intranuclear inclusion bodies in most cells of the outer sheath. The enlarged nuclei show thickening of the nuclear membrane and condensation of most intranuclear structures in acidophilic corpuscles of irregular shape, sometimes single, other times multiple, always separated from the nuclear membrane by a clear space apparently deprived of structure. Remaining portions of the linin reticulum are sometimes recognised besides the inclusion bodies. Minute granules suggestive of elementary corpuscles appear scattered in other nuclei faintly blue stained (advanced stages of the intranuclear inclusion bodies?). Intranuclear inclusion bodies could be demonstrated also in the epithelial cells of sebaceous glands which presented changes similar to those found in the hair follicles, but never in the cells of the epidermis. The histological changes in the epidermis however were quite similar to those just mentioned in the above structures.

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8

Alterações cutâneas do cão no Kala-Azar sul-americano

Torres, C. Magarinos
1941-01-01

Resumo em inglês According to E. Chagas (1938), South-American Kala Azar is a widespread disease from the jungle, several cases being reported from North Brazil (Estado do Pará: Marajó Island, Tocantins and Gurupi river valleys; Estados do Piauí and Ceará: coast and hinterland). Other cases were found in Northeast Brazil (Estados de Pernambuco, Alagôas and Sergipe: coast and hinterland; Estado da Bahia: hinterland). A few cases were described from Estado de Mato-Grosso (Brazil), Prov (mais) incia de Salta and Território do Chaco (Argentine), and Zona contestada do Chaco (Paraguai-Bolívia). A well defined secondary anemia associated with enlargement of the liver and spleen are the chief symptoms. Death usually occurs in cachexia and with symptoms of heart failure. Half the patients were children aged less than ten years (CHAGAS, CASTRO & FERREIRA, 1937). Quite exhaustive epidemiological researches performed by CHAGAS, FERREIRA, DEANE, DEANE & GUIMARÃES (1938) in Municipio de Abaeté (Estado do Pará, Brazil) gave the incidence of 1.48% for the natural infection in human, 4.49% in dogs, and 2.63% in cats. The infection was arcribed (CUNHA & CHAGAS, 1937) to a new species of Leishmania (L. chagasi). Latter CUNHA (1938) state, that it is identical to L. infantum. ADLER (1940) found that so far it has been impossible to distinguish L. chagasi from L. infantum by any laboratory test but a final judgment must be reserved until further experiments with different species of sandflies have been carried out. Skin changes in canine Kala Azar were signaled by many workers, and their importance as regards the transmission of the disease is recognized by some of them (ADLER & THEODOR, 1931, 2. CUNHA, 1933). Cutaneous ulcers in naturally infected dogs are referred by CRITIEN (1911) in Malta, by CHODUKIN & SCHEVTSCHENKO (1928) in Taschkent, by DONATIEN & LESTOCQUARD (1929) and by LESTOCQUARD & PARROT (1929) in Algeria, and by BLANC & CAMINOPETROS (1931) in Greece. Depilation is signaled by YAKIMOFF & KOHL-YAKIMOFF (1911) in Tunis, by YAKIMOFF (1915) in Turkestan. Eczematous areas or a condition described as "eczema furfurace" is sometimes noted in the areas of depilation (DONATIEN & LESTOCQUARD). The skin changes noticed by ADLER & THEODOR (1932) in dogs naturally infected with Mediterranean Kala Azar can be briefly summarized as a selective infiltration of macrophages around hair follicles including the sebaceous glands and the presence of infected macrophages in normal dermis. The latter phenomenon in the complete absence of secondary infiltration of round cells and plasma cells is the most striking characteristic of canine Kala Azar and differentiates it from L. tropica. In the more advanced stages the dermis is more cellular than that of normal dogs and may even contain a few small dense areas of infiltration with macrophages and some round cells and polymorphs. The external changes, i. e., seborrhea and depilation are roughly proportional to the number of affected hair follicles. In dogs experimentally infected with South-American Kala Azar the parasites were regularly found in blocks of skin removed from the living animal every fortnight (CUNHA, 1938). The changes noticed by CUNHA, besides the presence of Leishmania, were perivascular and diffuse infiltration of the cutis with mononuclears sometimes more marked near hair follicles, as well as depilation, seborrhea and ulceration. The parasites were first discovered and very numerous in the paws. Our material was obtained from dogs experimentally infected by Dr. A. MARQUES DA CUNHA

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