Papillomas And Carcinomas Of The Choroid Plexus: Histological And Immunohistochemical Studies And Comparison With Normal Fetal Choroid Plexus.

Choroid plexus tumors are rare. Results on immunohistochemical features are scanty and controversial even regarding normal plexus. Thirteen cases of choroid plexus tumors and five samples of normal fetal choroid plexus were submitted to immunohistochemical study using a panel of epithelial, neuronal and stromal markers. Relevant histological findings were presence of clear cells in 3/5 papillomas (PP) and 7/8 carcinomas (CA) and all 5 fetal plexuses; rhabdoid cells, desmoplasia and vascular proliferation were found respectively in 3, 4 and 5 cases out of 6 poorly differentiated CA and were absent in PP and well differentiated CA. Pancytokeratin AE1/AE3 was strongly positive in all 13 cases, even in the undifferentiated component of poorly differentiated CA, where reactivity was focal in 3 and diffuse in 3 cases. Low molecular weight cytokeratin (35betaH11) was not expressed in any of the 8 CA, but was present in all 5 PP. In 4 of 6 poorly differentiated CA there was reactivity for smooth muscle actin (1A4) in 10 to 30% of the cells. This was true also for one case lacking rhabdoid cells. Laminin was undetectable in all 6 cases of poorly differentiated CA but was present in 4 PP and 2 well differentiated CA. All 5 fetal plexuses expressed GFAP.62600-

Total water potential variation in a soil table land topsequence, during two years

O trabalho teve como objetivo avaliar quinzenalmente, em 1996 e 1997, a variação do potencial total da água ao longo do tempo, em solos de uma topossequência de tabuleiro localizada em Sapeaçu, BA. Esta topossequência tinha as seguintes características: a) comprimento de 190 m; b) declividade média de 0,097 m m-1; c) cultivo com laranja; d) Latossolo Amarelo argissólico coeso, no terço superior; e) Argissolo Amarelo coeso, no terço médio; f) Argissolo Acinzentado não coeso, no terço inferior. A umidade do solo foi medida com sonda de nêutrons, nas profundidades de 0,30, 0,70, 1,10 e 1,50 m. Com base nas respectivas curvas de retenção, obteve-se o potencial matricial e, em seguida, o potencial total da água, para cada solo, profundidade e tempo. A camada coesa dificulta o fluxo de água no solo, tanto no processo de molhamento como no de secamento. Em consequência, o potencial total da água em solos com camada coesa varia bruscamente na camada mais superficial, ao longo do tempo, e mais lentamente nas camadas mais profundas. Em solo não coeso, a variação brusca do potencial ocorre apenas na camada mais superficial. O limite de tensão de água no solo de -1.500 kPa como sendo o ponto de murchamento permanente não se aplica à cultura dos citros.The objective of this work was to evaluate, fortnightly, during 1996/1997, the total soil water potential variation in a tableland topsequence in Sapeaçu county, BA, Brazil. This topsequence had the following characteristics: a) length of 190 m; b) slope of 0.097 m m-1; c) orange as growing crop; d) the upper third with a cohesive argisolic Yellow Latosol; e) the middle third with a cohesive Yellow Argisol; and f) the lower third with a non-cohesive Gray Argisol. Soil water was estimated by neutron probe at depths of 0.30, 0.70, 1.10, and 1.50 m. Based on water retention curves, matric potential and, in sequence, total soil water potential were determined, for each soil and depth in different times. The cohesive layer makes difficult the water flow in the soil profile, both in the wetting and in the drying processes. Consequently, the total water potential in soils with cohesive layer changed abruptly in the most superficial layer, during the time, and slowing in the deepest layers. In non-cohesive soil, the water potential changed abruptly only in the most superficial layer. The -1,500 kPa limit of soil water pressure as permanent wilting point is not applied to orange crop

Ganglioglioma With Anaplastic Transformation.

70746-

Cerebral lymphoma mimicking glioblastoma in an AIDS patient / Linfoma cerebral que imita o glioblastoma em um paciente com AIDS

A 42-year-old male, HIV (human immunodeficiency virus) positive for 13 years, but without use of antiviral therapy, presented weight loss of 6 kg and erythematous-purplish lesions in the right buttock. Biopsy was showed cutaneous diffuse large B-cell lymphoma.  The patient received antiretroviral therapy and six cycles of chemotherapy achieving complete remission.After 5 years, the patient presented progressive headache with an episode of loss of balance with fall and mental confusion. Brain magnetic resonance imaging (MRI) showed a mass lesion in the periventricular region, involving the splenium of the corpus callosum with restricted diffusion. The brain images were consistent with glioblastoma (GBM) or DLBCL (diffuse large B-cell lymphoma). The hypoperfusion of the lesion on MRI was of fundamental importance for the differential diagnosis, favouring the diagnosis of  DLBCL

Flora da Bahia: Leguminosae – Hymenaea (Caesalpinioideae: Detarieae)

The taxonomic treatment of Hymenaea (Leguminosae) from the state of Bahia, Brazil, is presented here. We recognize 11 species; H. altissima, H. maranhensis, and H. rubriflora var. rubriflora are reported for the first time in the state. An identification key, descriptions, comments, distribution maps of species in the state and illustrations of diagnostic characters are presented.É apresentado aqui o tratamento taxonômico de Hymenaea (Leguminosae) do estado da Bahia, Brasil. São reconhecidas 11 espécies; H. altissima, H. maranhensis e H. rubriflora var. rubriflora são registradas pela primeira vez no estado. O trabalho inclui chave de identificação, descrições, comentários, mapas de distribuição das espécies no estado e ilustrações de caracteres diagnósticos

Sarcoma primário de leptomeninges: apresentação não usual e aspectos de neuroimagem previamente não descritos

Sem informação77967567

PRIMER REGISTRO DE RHABDIAS (NEMATODA: RHABDIASIDAE) EN HYPSIBOAS RANICEPS, CERRADO, BRASIL

Um novo registro de Rhabdias parasitando Hypsiboas raniceps Stiles & Hassal 1905 em uma área de Cerrado é apresentado neste trabalho. O gênero é comumente encontrado parasitando pulmões de anfíbios e reptéis no mundo todo. Foram analisados sete espécimes de H. raniceps, onde dois estavam parasitados com nematódeos do gênero Rhabdias nos pulmões. Um total de seis nematódeos foram encontrados, e identificados com base na morfologia das estruturas, e nas medidas realizadas nos espécimes. Esta nota apresenta o primeiro registro de Rhabdias em H. raniceps, sendo assim a espécie um novo hospedeiro de Rhabdias

Flora da Bahia: Leguminosae – Aliança Chloroleucon (Mimosoideae: Ingeae)

A floristic survey of the genera Blanchetiodendron, Chloroleucon and Leucochloron is presented for the state of Bahia, Brazil. Five species of Chloroleucon (C. acacioides, C. dumosum, C. extortum, C. foliolosum and C. tortum), two of Leucochloron (L. limae and L. minarum) and the only species of Blanchetiodendron (B. blanchetii) were recognised. Identification keys to genera and species, descriptions and comments for taxa, as well as illustrations and distribution maps of the species in Bahia, are presented.É apresentado o levantamento florístico de Blanchetiodendron, Chloroleucon e Leucochloron no estado da Bahia, Brasil. Foram encontradas cinco espécies de Chloroleucon (C. acacioides, C. dumosum, C. extortum, C. foliolosum e C. tortum), duas de Leucochloron (L. limae e L. minarum) e a única espécie de Blanchetiodendron (B. blanchetii). São apresentadas chave de identificação para gêneros e espécies, descrições, comentários para os táxons, além de ilustrações e mapas de distribuição das espécies na Bahia

Pituitary Macroadenoma Presenting As A Nasal Tumor: Case Report.

Pituitary macroadenomas are rare intracranial tumors. In a few cases, they may present aggressive behavior and invade the sphenoid sinus and nasal cavity, causing unusual symptoms. In this paper, we report an atypical case of pituitary adenoma presenting as a nasal mass. The patient was a 44-year-old woman who had had amenorrhea and galactorrhea for ten months, with associated nasal obstruction, macroglossia and acromegaly. Both growth hormone and prolactin levels were increased. Magnetic resonance imaging showed a large mass originating from the lower surface of the pituitary gland, associated with sella turcica erosion and tumor extension through the sphenoid sinus and nasal cavity. Histopathological analysis demonstrated a chromophobe pituitary adenoma with densely packed rounded epithelial cells, with some atypias and rare mitotic figures. There was no evidence of metastases. Macroadenoma invading the nasal cavity is a rare condition and few similar cases have been reported in the literature. This study contributes towards showing that tumor extension to the sphenoid sinus and nasopharynx needs to be considered and investigated in order to make an early diagnosis when atypical symptoms like nasal obstruction are present.132377-8