Ossifying fibroma: A rare cause of orbital inflammation

Purpose: To describe the clinical and radiologic features of 4 cases of ossifying fibroma affecting the orbit and to review the literature on orbital involvement by the tumor. Methods: Small case series. Results: Four patients (3 children and 1 adult) with ossifying fibromas invading the orbit were examined. Two of the 3 children were examined for ossifying fibromas on the orbital roof. One had the psammomatoid form of the disease and the other the trabecular variant. Despite striking differences in the histologic pattern and in the radiologic appearance of the lesions, both children displayed a significant degree of orbital inflammation mimicking orbital cellulitis. The third child and the adult patient had the orbit involved by trabecular ossifying fibromas invading the orbital floor. The tumor of the adult clearly originated in the maxilla, filled the maxillary sinus, and eroded the orbital floor. The tumor of the third child occupied the maxillary, ethmoid, and sphenoid sinuses. In both cases, the clinical presentation was painless eye dystopia and proptosis. Conclusions: Regardless of the histologic pattern (trabecular or psammomatoid), ossifying fibromas can induce a substantial degree of orbital inflammation in children and must be included in the differential diagnosis of acute orbital inflammation during childhood.

Clonal Complex Chromosome Aberration in Non-Ossifying Fibroma

Cytogenetic information of non-ossifying fibromas (NOFs) is exceptionally limited. This fact relies, in part, on their benign nature but mainly because most cases evolve undetected or there is no need for surgical intervention. We report the case of a NOF arising in the left tibia of a 14-year-old male with an invariable clonal translocation. The karyotype was denoted as 42-46,XY,t(11;3;14)(q23;p21;p11). There are only two previous reported cases of clonally aberrant NOF. Records from additional cases will be essential to assess whether consistent karyotypic aberrations define this lesion. Pediatr Blood Cancer 2010;54:764 767. (C) 2010 Wiley-Liss, Inc.

Central odontogenic fibroma: retrospective study of 8 clinical cases

Introduction and Objectives: The central odontogenic fibroma (COF) is a benign odontogenic tumour derived from the dental mesenchymal tissues. It is a rare tumour and only 70 cases of it have been published. Bearing in mind the rareness of the tumour, 8 new cases of central odontogenic fibroma have been found by analyzing the clinical, radiological and histopathological characteristics of COF. Patients and Method: A retrospective study was carried out on 3011 biopsies in the Service of Oral and Maxillofacial Surgery of the Dental Clinic of Barcelona University between January 1995 and March 2008. 85 odontogenic tumours were diagnosed of which 8 were central odontogenic fibroma. The radiological study was based on orthopantomographs, periapical and occlusal radiographies and computerised tomographics. The variables collected were: sex, age, clinical characteristics of the lesion, treatment received and possible reappearances of the tumour. Results: The central odontogenic fibroma represents 9.4% of all odontogenic tumours. Of the 8 cases, 5 were diagnosed in men and 3 in women. The average age was 19.9 years with an age range of 11 to 38 years. The most common location of the tumour was in the mandible. All cases were associated with unerupted teeth. Of the 8 tumours, 3 provoked rhizolysis of the adjacent teeth and 4 cases caused cortical bone expansion. 50% of the patients complained of pain associated to the lesion. No case of recurrence was recorded up to 2 years after the treatment. Conclusions: Central odontogenic fibromas usually evolve asymptomatically although they can manifest very aggressively provoking dental displacement and rhizolysis. Radiologically, COF manifest as a uni or multilocular radiotransparent image although they can be indistinguishable from other radiotransparent lesions making diagnosis more difficult. COF treatment involves conservative surgery as well as follow-up patient checks.

Peripheral Ossifying Fibroma

The peripheral ossifying fibroma (POF) is a common gingival growth usually arising from the interdental papilla. The anterior maxilla is the most common location of involvement. The etiology and pathogenesis of POF remains unknown. Some investigators consider it a neoplastic process, whereas others argue that it is a reactive process; in either case, the lesion is thought to arise from cells in the periodontal ligament. Trauma or local irritants, such as dental plaque, calculus, microorganisms, masticatory force, ill-fitting dentures, and poor quality restorations, have been implicated in the etiology of POF. The recommended treatment is the excisional biopsy; however, it can leave a defect if the procedure is not followed by a subepithelial connective tissue graft. The main objective of this article was to present a clinical case of excisional biopsy of a POF followed by a subepithelial connective tissue graft to correct the defect caused by the biopsy. The biopsy defect was satisfactorily repaired, and the lesion has not recurred after 6 years of follow-up.

Cutaneous Fibroma in a Captive Common Snapping Turtle (Chelydra serpentina)

An adult female common snapping turtle (Chelydra serpentina) had a mass on the plantar surface of the right forelimb that was removed surgically. Microscopical examination revealed many spindle cells with mild anisocytosis and anisokaryosis and a surrounding collagenous stroma. There were no mitoses. Immunohistochemistry showed that the spindle cells expressed vimentin, but not desmin. A diagnosis of cutaneous fibroma was made. Tumours are reported uncommonly in chelonian species. Cutaneous fibroma has been diagnosed in an alligator snapping turtle (Macrochelys temminckii), but not previously in a common snapping turtle. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.

Frequency Of The Allelic Variant C.1150t > C In Exon 10 Of The Fibroblast Growth Factor Receptor 3 (fgfr3) Gene Is Not Increased In Patients With Pathogenic Mutations And Related Chondrodysplasia Phenotypes.

Mutations in the FGFR3 gene cause the phenotypic spectrum of FGFR3 chondrodysplasias ranging from lethal forms to the milder phenotype seen in hypochondroplasia (Hch). The p.N540K mutation in the FGFR3 gene occurs in ���70% of individuals with Hch, and nearly 30% of individuals with the Hch phenotype have no mutations in the FGFR3, which suggests genetic heterogeneity. The identification of a severe case of Hch associated with the typical mutation c.1620C > A and the occurrence of a c.1150T > C change that resulted in a p.F384L in exon 10, together with the suspicion that this second change could be a modulator of the phenotype, prompted us to investigate this hypothesis in a cohort of patients. An analysis of 48 patients with FGFR3 chondrodysplasia phenotypes and 330 healthy (control) individuals revealed no significant difference in the frequency of the C allele at the c.1150 position (p = 0.34). One patient carrying the combination `pathogenic mutation plus the allelic variant c.1150T > C' had a typical achondroplasia (Ach) phenotype. In addition, three other patients with atypical phenotypes showed no association with the allelic variant. Together, these results do not support the hypothesis of a modulatory role for the c.1150T > C change in the FGFR3 gene.

The C-terminal Region Of The Human P23 Chaperone Modulates Its Structure And Function.

The p23 protein is a chaperone widely involved in protein homeostasis, well known as an Hsp90 co-chaperone since it also controls the Hsp90 chaperone cycle. Human p23 includes a ��-sheet domain, responsible for interacting with Hsp90; and a charged C-terminal region whose function is not clear, but seems to be natively unfolded. p23 can undergo caspase-dependent proteolytic cleavage to form p19 (p231-142), which is involved in apoptosis, while p23 has anti-apoptotic activity. To better elucidate the function of the human p23 C-terminal region, we studied comparatively the full-length human p23 and three C-terminal truncation mutants: p23���������������; p23��������������� and p23���������������. Our data indicate that p23 and p19 have distinct characteristics, whereas the other two truncations behave similarly, with some differences to p23 and p19. We found that part of the C-terminal region can fold in an ��-helix conformation and slightly contributes to p23 thermal-stability, suggesting that the C-terminal interacts with the ��-sheet domain. As a whole, our results suggest that the C-terminal region of p23 is critical for its structure-function relationship. A mechanism where the human p23 C-terminal region behaves as an activation/inhibition module for different p23 activities is proposed.

Avalia����o do teor e da estabilidade de vitaminas do complexo B e vitamina C em bebidas isot��nicas e energ��ticas

Vitamin C stability and concentration was evaluated in isotonic beverages and B group vitamins (B1, B2, B3, B5 and B6) in power beverages. The amount of vitamins was found to be above of that declared on the labels, even after the shelf life had been exceeded. A small decrease in the amount of B group vitamins was observed during the shelf life of the products. In the case of vitamin C this decrease was slightly higher. The present research shows the need of increased quality control and inspection.

Caracteriza����o f��sico-qu��mica de filmes comest��veis de amido adicionado de acerola (Malphigia emarginata D.C.)

Edibles films are an alternative to synthetic materials used for packing food products. Barbados cherry is rich in vitamin C and carotenoids. The aim of this study was to characterize and develop films by casting from cassava starch, lyophilized Barbados cherry pulp and glycerol. The films were characterized with respect to thickness, water vapor permeability (WVP), water solubility, vitamin C, carotene and mechanical properties. The interaction of pulp and glycerol reduced film thickness. An increase in pulp concentration up to 60% increased WVP but beyond this concentration reduced both WVP and solubility leading to an increased level of vitamin C and β carotene in the films.

O uso da mitomicina C em cirurgia combinada

Purpose: To analyze the efficacy and safety of intraope-rative mitomycin C (MMC) in combined procedures (extra-capsular cataract extraction + trabeculectomy). Methods: Twenty-four patients were randomized to either MMC (0.5 mg/ml) (n = 14) or saline solution (n = 10) for 3 minutes during the combined procedure. Results: Twelve months after surgery, mean IOP in the MMC group (13.2 �� 2.9 mmHg) was significantly lower than in the control group (16.3 �� 3.9 mmHg) (p = 0.02). The mean number of medications used during the 12-month follow-up in the control group (1.33 �� 0.5) was significantly higher than in the MMC-treated group (0.5 �� 0.5) (p = 0.005). Life table analysis showed a significantly higher probability of IOP control in the MMC group than in the control group (p < 0.01). Conclusions: Intraoperative MMC is safe and effective in pro-moting a better IOP control and reducing the need for postoperative antiglaucoma medications. We suggest intraope-rative MMC to be routinely employed in combined procedures.

Central retinal vein thrombosis as an initial manifestation of heterozygous protein C deficiency: case report

The purpose of this paper is to report a case of central retinal vein thrombosis associated with isolated heterozygous protein C deficiency. Acute occlusion of the central retinal vein presents as one of the most dramatic pictures in ophthalmology. It is often a result of both local and systemic causes. A rare systemic cause is heterozygous protein C deficiency, and it usually occurs in combination with other thrombophilic conditions. This case highlights that isolated heterozygous protein C deficiency may be the cause of central retinal vein thrombosis and underscores the importance of its screening in young patients with this ophthalmologic disease.

O papel do trabalho na transforma����o do homem em macaco : estudo sobre a disciplina no trabalho do jogador profissional do Sert��ozinho F. C

Universidade Estadual de Campinas. Faculdade de Educa����o F��sica

Atividade fisica e a rela����o com a qualidade de vida, ansiedade e depress��o em pessoas com sequelas de acidente vascular cerebral isquemico (AVCI)/ c Alberto Martins da Costa

Universidade Estadual de Campinas . Faculdade de Educa����o F��sica

Estabilidade oxidativa e microbiol��gica em carne de galinha mecanicamente separada e adicionada de antioxidantes durante per��odo de armazenamento a -18 &deg;C

Com o objetivo de acompanhar a estabilidade f��sico-qu��mica e microbiol��gica da carne mecanicamente separada (CMS) de diferentes origens e estocada durante 99 dias a -18 &deg;C, foi realizada pr��via mistura de conservante (nitrito de s��dio) e antioxidante (eritorbato de s��dio) em CMS obtida de duas linhagens de aves: galinhas matrizes de corte e galinhas poedeiras comerciais brancas. Na CMS de cada linhagem foram realizados tr��s diferentes tratamentos: 1) controle (sem aditivos); 2) adi����o de 150 ppm de nitrito; e 3) adi����o de 150 ppm de nitrito e 500 ppm de eritorbato. Os resultados encontrados demonstraram que a adi����o de nitrito isoladamente n��o impediu a oxida����o lip��dica, avaliada atrav��s do ��ndice de TBARS, nem a altera����o na cor, avaliada em color��metro. Por outro lado, a adi����o de nitrito juntamente com eritorbato foi efetiva na redu����o dos problemas de oxida����o lip��dica na CMS de galinhas matrizes, e em menor grau, na CMS de poedeiras. A adi����o de nitrito e eritorbato na CMS tamb��m melhorou a preserva����o da cor vermelha desej��vel (a*) ao longo do tempo. A avalia����o da estabilidade microbiol��gica da CMS, realizada no primeiro e ��ltimo dia de estocagem congelada, para microrganismos mes��filos, Escherichia coli, Staphylococcus aureus, Clostridium perfringens e Pseudomonas spp., e quinzenalmente para microrganismos psicrotr��ficos, indicou que n��o houve uma varia����o significativa nas contagens em fun����o do tratamento utilizado (diferentes aditivos adicionados). N��o foi detectada Salmonella spp. em nenhuma das amostras analisadas. Em fun����o da melhoria da estabilidade oxidativa, recomenda-se a adi����o de nitrito (150 ppm) e eritorbato (500 ppm) em CMS de galinhas matrizes a ser estocada congelada por um per��odo prolongado.

Vitaminas D e C para poedeiras na fase inicial de produ����o de ovos

Um experimento foi conduzido com o objetivo de avaliar os efeitos de duas fontes de vitamina D e tr��s n��veis de vitamina C sobre as caracter��sticas de desempenho, a qualidade interna e externa dos ovos, os n��veis de c��lcio total e i��nico s��ricos e a resist��ncia ��ssea de poedeiras. Foram utilizadas 288 galinhas da linhagem ISA Babcock B300�� com 23 semanas de idade, durante um per��odo experimental de 12 semanas. Utilizou-se o delineamento inteiramente ao acaso em arranjo fatorial 2 &#215; 3, com os fatores: fontes de vitamina D (colecalciferol e 25-hidroxicolecalciferol - 25(OH)D3) e de vitamina C (0, 100 e 200 ppm), totalizando seis tratamentos com oito repeti����es de seis aves. O n��vel basal de colecalciferol foi de 2.756 UI/kg, correspondendo a 5,51 g do produto comercial Hy.D��/t de ra����o, como fonte de 25(OH)D3. Os fatores estudados n��o influenciaram o consumo de ra����o, a produ����o, o peso e a massa de ovos. Observou-se efeito da intera����o de fontes de vitamina sobre a convers��o alimentar, que foi melhor quando utilizado metab��lito 25(OH)D3 na aus��ncia de vitamina C. Intera����es foram observadas para porcentagem de alb��men e porcentagem de gema, que aumentaram na presen��a de 200 ppm de vitamina C. O peso espec��fico dos ovos, as concentra����es de c��lcio s��rico, cinzas ��sseas e a resist��ncia �� quebra n��o foram influenciadas pelas fontes de vitamina D e C. Houve intera����o para porcentagem e espessura de casca, cujos maiores valores foram obtidos com a suplementa����o de vitamina C na presen��a de 25(OH)D3. Em poedeiras na fase inicial de produ����o, a convers��o alimentar �� melhor com a utiliza����o do 25(OH)D3 e a espessura e porcentagem de casca tamb��m melhoram com a utiliza����o de 25(OH)D3 e a suplementa����o de vitamina C nas dietas (100 ou 200 ppm, respectivamente).