In vitro antimicrobial effects of 3 root canal sealers on Actinomyces radicidentis.

OBJECTIVE: To determine the in vitro antimicrobial effects of 3 endodontic sealers--AH Plus, Sealapex, and Tubli-Seal--on Actinomyces radicidentis, a bacterial species commonly found in root canals. METHODS: Prior to the experimental procedures, bacterial identification tests, such as Gram staining, catalase, and API 20A, were performed, and the bacteria were identified as A. radicidentis. The agar diffusion susceptibility test was performed to determine the areas of bacterial growth inhibition and, consequently, the microbial resistance of the 3 sealers against A. radicidentis. Chlorhexidine was used as a positive control, and saline solution was used as a negative control. RESULTS: Tubli-Seal cement had an average diameter of inhibition zones in the 3 panels of 22.73 mm, that of AH Plus was 17.13 mm, and that of Sealapex, 11.99 mm. A one-way ANOVA test showed that there were significant differences between the 3 cements (p < 0.05). CONCLUSION: Tubli-Seal showed the highest levels of antimicrobial activity, which was followed by AH Plus with the next highest levels and, finally, Sealapex with the lowest levels of antimicrobial activity.

Effect of antihypertensive treatment on the quality of life of patients with chronic rhinosinusitis with nasal polyps.

AIM: Nasal polyposis (CRSwNP) shares type 2 inflammation biomarkers with asthma, allergy or arterial hypertension (AH), including periostin, a predictive marker of severity and post-surgical recurrence of polyposis. Antihypertensives have been shown to decrease periostin expression. We set out to evaluate the effect of antihypertensives on the quality of life of patients with CRSwNP. MATERIALS AND METHODS: Retrospective study of 43 patients with CRSwNP and ah with at least 1year of follow-up and antihypertensive treatment prescribed after the diagnosis of CRSwNP. Phenotypes were analyzed (F1: isolated CRSwNP; F2: CRSwNP with asthma and/or NERD) and aspects related to quality of life (SNOT-22), clinical severity (VAS), polypoid size (NPS), exacerbations and surgical needs after the initiation of antihypertensive treatment. RESULTS: The predominant phenotype was F1 (62.8%). The number of exacerbations was 19.2% for F1, compared to 31.3% for F2. 34.8% underwent surgery after the start of antihypertensive treatment (F1=27.9% and F2=6.97%). A significant reduction in polypoid size, SNOT22 (16.4±19.6 points), and VAS scales (p<.05) was obtained. CONCLUSIONS: polypoid size, and reduce the risk of postoperative recurrence.

Sympathetic chain clipping for hyperhidrosis is not a reversible procedure.

BACKGROUND: Many techniques have been used to treat palmar hyperhidrosis. Compensatory sweating is a difficult adverse effect. Clipping has been proposed because of its supposed reversibility when clips are removed at a later date. The primary aims of this article are to investigate the neuronal lesion of the sympathetic chain caused by clipping and to study the possibility of regeneration after removal of the clips. METHODS: We performed an experimental study at the Minimally Invasive Surgery Centre Jesus Uson in Caceres (Spain). We used a swine model, performing clipping, unclipping, and extirpation of different segments of sympathetic chain with clips and after clip removal, following a chronogram of 10, 20, and 30 days. Pathologic studies of specimens and statistics were done at the University of Seville. RESULTS: Ten days after clipping, all sympathetic chains displayed evident Wallerian degeneration. Twenty days after clipping, Wallerian degeneration of myelinated fibers was more widespread and also more striking. Thirty days after clipping, a very marked macrophagic reaction was visible, with multiple signs of phagocytosis of myelin debris. By 30 days post operation and 20 days after clip removal, a few residual myelin and amyelinated fibers were visible. These findings suggest that axon regeneration is not possible. CONCLUSIONS: There are Wallerian degeneration and axon loss 10 days after clipping. The almost total absence of myelinated and amyelinated fibers following clip removal suggests that there was no nerve regeneration, and that therefore clipping cannot be considered a reversible technique.

Molecular study of signaling-pathway genes in experimental rat thyroid carcinoma.

INTRODUCTION: A study was conducted on histological patterns and biomolecular changes in Goitrogen-induced experimental rat thyroid tumors. The link between the histological types observed and N-ras, B-raf, and PI3KCA gene mutations widely reported in human thyroid cancers was explored. MATERIAL AND METHODS: An analysis was done on paraffin-embedded tumor tissue sections from Wistar rats receiving 1% potassium perchlorate (KClO(4)) added to the ad libitum drinking-water supply over an 18-month period. Three experimental subgroups were formed, each comprising 10 thyroids: subgroup I (control) consisted of thyroids from untreated controls; subgroups II and III (experimental) consisted of thyroids from KClO(4)-treated rats, displaying capsular, vascular, or both invasion but no metastasis (II), or distant metastasis (III). DNA was extracted from paraffin-embedded tissues. To test for the genetic mutations most widely reported in human thyroid cancers, exon 1 of the N-ras gene, exons 9 and 20 of the PI3KCA gene, and exon 15 of the B-raf gene were amplified and sequenced. RESULTS: All tumors were of the follicular type. None of the 20 experimental rat thyroids displayed the expected gene mutations reported in humans. However, 90% of them contained four new B-raf gene mutations and all were silent and did not cause an amino acid substitution in the protein chain. CONCLUSIONS: Biomolecular analysis suggested that N-ras, PI3KCA, and B-raf gene mutations may not be involved in thyroid tumor formation using the experimental procedure applied in this study. But the four mutations in B-raf, though without functional repercussions, may be a specific marker for this tumor type.

Inter-rater agreement in the choice of prophylactic treatment for vestibular migraine and role of an assisted algorithm for this choice. / Concordancia interevaluador en la elección de tratamiento profiláctico para la migraña vestibular y papel de un algoritmo asistido para la elección de dicho tratamiento.

BACKGROUND AND OBJECTIVE: Vestibular migraine (VM) is a cause of episodic vestibular syndrome. There are many drugs available for its prophylaxis and currently the choice is mainly made according to the patient's comorbidities. The aim of this article was to measure the agreement of a group of otorhinolaryngologists in the choice of a prophylactic treatment and to evaluate the role of an assisted algorithm in the choice of this prophylaxis. MATERIAL AND METHOD: The medical records of 10 patients with VM were offered to 10 otolaryngologists who were asked to select for each patient the drug they considered most appropriate among five possible options. The Fleiss' κ index was calculated among the 10 otolaryngologists alone, recalculating it including the algorithm as the eleventh evaluator, and Cohen's κ index was calculated between each otolaryngologist and the answers of the algorithm. The otolaryngologists were offered the option to change their responses after knowing the responses of the algorithm and then both indexes were calculated again. RESULTS: The Fleiss' κ index was .302. This index was raised to .343 after introducing the algorithm as an evaluator. After offering the responses proposed by the algorithm, Cohen's κ was improved in 9 of the 10 evaluators, and Fleiss' κ rose to .711. CONCLUSIONS: The agreement between otorhinolaryngologists in choosing prophylaxis for MV can be defined as "fair". The responses of the algorithm for the choice of prophylaxis were close to the average opinion of the otolaryngologists, raising the agreement between them to "substantial".

Chromosome-12 copy number alterations and MDM2, CDK4 and TP53 expression in soft tissue liposarcoma.

BACKGROUND: Liposarcoma is a heterogeneous group of soft tissue sarcomas in which definitive prognostic parameters need to be identified. MATERIALS AND METHODS: The series included 33 consecutive soft tissue (well-differentiated, WDLPS, n=19; and dedifferentiated, DDLPS, n=14) liposarcoma. Clinicopathological variables included age, gender, body location, degree of dedifferentiation and mitotic count. The rrolecular analysis included MDM2, CDK4 and TP53 expressions and chromosome-12 copy number alterations. RESULTS: Centrally located (retroperitoneal, abdominal cavity or groin region) WDLPS had more dedifferentiation (p=0.001). Patients with DDLPS and a high mitotic rate died (p=0.070) or experienced recurrencies (p=0.029) more frequently. Co-expression of MDM2/CDK4 (p=0.001) and TP53 accumulation (p=0.017) related to dedifferentiation but not to recurrence or death, both in WDLPS and DDLPS. DDLPS had higher centromeric chromosome-12 copy number than WDLPS (p=0.013), but this was unrelated to recurrence or death. CONCLUSION: Central location is a risk factor in WDLP. Co-expression of MDM2/CDK4/TP53 and chromosome-12 alterations characterize DDLPS suggesting a link with dedifferentiation.

Inmunohistochemical profile of solid cell nest of thyroid gland.

It is widely held that solid cell nests (SCN) of the thyroid are ultimobranchial body remnants. SCNs are composed of main cells and C cells. It has been suggested that main cells might be pluripotent cells contributing to the histogenesis of C cells and follicular cells, as well as to the formation of certain thyroid tumors. The present study sought to analyze the immunohistochemical profile of SCN and to investigate the potential stem cell role of SCN main cells. Tissue sections from ten cases of nodular hyperplasia (non-tumor goiter) with SCNs were retrieved from the files of the Hospital Infanta Luisa (Seville, Spain). Parathormone (PTH), calcitonin (CT), thyroglobulin (TG), thyroid transcription factor (TTF-1), galectin 3 (GAL3), cytokeratin 19 (CK 19), p63, bcl-2, OCT4, and SALL4 expression were evaluated by immunohistochemistry. Patient clinical data were collected, and tissue sections were stained with hematoxylin-eosin for histological examination. Most cells stained negative for PTH, CT, TG, and TTF-1. Some cells staining positive for TTF-1 and CT required discussion. However, bcl-2, p63, GAL3, and CK 19 protein expression was detected in main cells. OCT4 protein expression was detected in only two cases, and SALL4 expression in none. Positive staining for bcl-2 and p63, and negative staining for PTH, CT, and TG in SCN main cells are both consistent with the widely accepted minimalist definition of stem cells, thus supporting the hypothesis that they may play a stem cell role in the thyroid gland, although further research will be required into stem cell markers. Furthermore, p63 and GAL-3 staining provides a much more sensitive means of detecting SCNs than staining for carcinoembryonic antigen, calcitonin, or other markers; this may help to distinguish SCNs from their mimics.

Molecular findings of nasopharyngeal carcinoma in a European population.

OBJECTIVE: To explore biomolecular characteristics of a group of patients with nasopharyngeal carcinoma from European (Spanish) hospitals, addressing the pathogenesis of the tumor and the response to treatment. STUDY DESIGN: Cyclin D1 and p16 expression were evaluated immunohistochemically in 33 tissue samples of nasopharyngeal carcinoma. CCDN1 gene amplification and p16 gene deletion were studied by fluorescence in situ hybridization. Patient clinical data were examined, and tissues were evaluated histologically using hematoxylin-eosin staining. RESULTS: Cyclin D1 overexpression was found in 19 cases, and p16 expression was undetected in 30 cases. An association was observed between impaired p16 expression and cyclin D1 overexpression (p = 0.034). Eleven patients displayed p16 gene deletion and CCDN1 gene amplification. CONCLUSION: Cyclin D1 overexpression and CCDN1 amplification, loss of p16 expression and p16 deletion may be among the genetic alterations involved in the pathogenesis of nasopharyngeal carcinoma.

Concordancia interevaluador en la elección de tratamiento profiláctico para la migraña vestibular y papel de un algoritmo asistido para la elección de dicho tratamiento / Inter-rater agreement in the choice of prophylactic treatment for vestibular migraine and role of an assisted algorithm for this choice

ANTECEDENTES Y OBJETIVO: La migraña vestibular (MV) es una de las causas de síndrome vestibular episódico. Existen muchos fármacos disponibles para su profilaxis y actualmente su elección se realiza mayoritariamente según las comorbilidades del paciente. El objetivo de este artículo es medir la concordancia de un grupo de otorrinolaringólogos en la elección de profilaxis y evaluar el papel que ejerce sobre esta un algoritmo asistido para la elección de profilaxis. MATERIAL Y MÉTODO: Las historias clínicas de 10 pacientes con MV fueron ofrecidas a 10 otorrinolaringólogos, a los que se les pidió que seleccionasen para cada paciente el fármaco que considerasen más adecuado entre 5 opciones posibles. Se calcularon los índices κ de Fleiss entre los 10 otorrinolaringólogos solos y se recalcularon incluyendo al algoritmo como undécimoevaluador, y la κ de Cohen entre cada otorrinolaringólogo y el algoritmo. Se ofreció a los otorrinolaringólogos la opción de cambiar su respuesta tras conocer la respuesta del algoritmo, y ambos índices fueron calculados nuevamente. RESULTADOS: El índice κ de Fleiss fue de 0,302. Dicho índice se elevó a 0,343 tras introducir al algoritmo como evaluador. Tras ofrecer las soluciones propuestas por el algoritmo, se mejoró la κ de Cohen en 9 de los 10 evaluadores y la κ de Fleiss subió a 0,711. CONCLUSIONES: La concordancia entre otorrinolaringólogos para elegir profilaxis para la MV se define como «justa». Las respuestas del algoritmo para la elección de profilaxis se situaron próximas a la opinión media de los otorrinolaringólogos, elevando la concordancia entre ellos a «sustancial»

BACKGROUND AND OBJECTIVE: Vestibular migraine (VM) is a cause of episodic vestibular syndrome. There are many drugs available for its prophylaxis and currently the choice is mainly made according to the patient's comorbidities. The aim of this article was to measure the agreement of a group of otorhinolaryngologists in the choice of a prophylactic treatment and to evaluate the role of an assisted algorithm in the choice of this prophylaxis. MATERIAL AND METHOD: The medical records of 10 patients with VM were offered to 10 otolaryngologists who were asked to select for each patient the drug they considered most appropriate among five possible options. The Fleiss' κ index was calculated among the 10 otolaryngologists alone, recalculating it including the algorithm as the eleventh evaluator, and Cohen's κ index was calculated between each otolaryngologist and the answers of the algorithm. The otolaryngologists were offered the option to change their responses after knowing the responses of the algorithm and then both indexes were calculated again. RESULTS: The Fleiss' κ index was .302. This index was raised to .343 after introducing the algorithm as an evaluator. After offering the responses proposed by the algorithm, Cohen's κ was improved in 9 of the 10 evaluators, and Fleiss' κ rose to .711. CONCLUSIONS: The agreement between otorhinolaryngologists in choosing prophylaxis for MV can be defined as "fair". The responses of the algorithm for the choice of prophylaxis were close to the average opinion of the otolaryngologists, raising the agreement between them to "substantial"

Spindle epithelial tumor with thymuslike differentiation in a 2-year-old boy: a case report.

BACKGROUND: The spindle epithelial tumor with thymuslike differentiation (SETTLE) is a rare thyroid tumor believed to be derived from ectopic thymus tissue or the embryonic remnants of branchial pouches, which displays primitive thymic differentiation. Histologic observation of spindle cells may lead to confusion with other tumors the development and prognosis of which are very different. Differential diagnosis using histochemical markers is essential since although there is a tendency to develop blood-borne metastases, tumor growth is slow and the survival rate in patients followed up is as high as 70%. It mainly affects children and young adults (mean age 15), although cases have been reported in patients ranging from 2 to 59. CASE: A 2-year-old boy presented with a tumor on the anteroinferior aspect of the neck, which had been growing since birth, suggesting a congenital origin. Histologic examination showed spindle cell nodules separated by fibrous bands containing mucous glands and cysts filled with mucoid material. Immunohistochemical markers revealed primitive differentiation; tumor cells stained positive for cytokeratin and vimentin but negative for markers indicative of greater differentiation, such as calcitonin, chromogranin, calretinin, synaptophysin and S-100 protein. CONCLUSION: This is the first reported case of SETTLE in the youngest patient which had been growing since birth.

W43X SDHD mutation in sporadic head and neck paraganglioma.

OBJECTIVE: To analyze the presence of SDHD gene mutations in patients with sporadic head and neck paraganglioma. STUDY DESIGN: The presence of somatic and germline SDHD mutations was investigated in 10 patients by polymerase chain reaction and direct sequencing. RESULTS: Two patients displayed mutations: 259C>T (P87S) in 1 case and 129G>A (W43X) in the other. The first was considered a neutral polymorphism. The second was present in the germline of 1 of her sons, who had an apparently unrelated testicular seminoma and loss of heterozygosity (LOH) in the tumor cells. CONCLUSION: This is the first reported case of an SDHD mutation carrier showing LOH in a testicular seminoma.

Síndrome de Eagle. Una causa infrecuente de neuralgia por irritación mecánica / No disponible

No disponible

Conclusiones de la primera conferencia de consenso española multidisciplinaria sobre manifestaciones extraesofágicas de la enfermedad por reflujo / Extraesophageal manifestations of reflux disease

No disponible