Microstructure and Electrical Conductivity of Cement Paste Reinforced with Different Types of Carbon Nanotubes.

Over the last few years, the addition of small amounts of carbon nanotubes (CNTs) to construction materials has become of great interest, since it enhances some of the mechanical, electrical and thermal properties of the cement. In this sense, single-walled and multi-walled carbon nanotubes (SWCNTs and MWCNTs, respectively) can be incorporated into cement to achieve the above-mentioned improved features. Thus, the current study presents the results of the addition of SWCNTs and MWCNTs on the microstructure and the physical properties of the cement paste. Density was measured through He pycnometry and the mass change was studied by thermogravimetric analysis (TGA). The microstructure and the phases were analyzed using scanning electron microscopy (SEM) and X-ray diffraction (XRD). Finally, the electrical conductivity for different CNT concentrations was measured, and an exponential increase of the conductivity with concentration was observed. This last result opens the possibility for these materials to be used in a high variety of fields, such as space intelligent systems with novel electrical and electronic applications.

Fatal outcome due to bacterial superinfection of eczema herpeticum in a patient with mycosis fungoides.

Kaposi varicelliform eruption or eczema herpeticum is well known to be associated with several chronic dermatoses, including atopic dermatitis, foliaceus pemphigus, seborrheic dermatitis, Darier disease, and congenital ichthyosiform erythroderma. Although less frequently, it has also been described in cases of mycosis fungoides and Sèzary syndrome. We would like to report an extremely rare case of a woman with a T-cell cutaneous lymphoma who developed disseminated cutaneous herpes simplex with S. aureus sepsis and a fatal outcome.

Zosteriform cutaneous metastasis from a breast carcinoma

Las metástasis cutáneas de carcinomas internos son infrecuentes y con patrón zosteriforme son raras. Para estudiar las características de las metástasis zosteriformes estudiamos 38 casos de la literatura y una paciente vista en nuestro Servicio. Métodos: Estudiamos la edad y sexo de cada paciente, la localización del tumor primario, la anatomía patológica del primario y las lesiones cutáneas, localización de las lesiones cutáneas y presencia o ausencia de dolor en los 39 casos. Resultados: La localización más frecuente del cáncer primario fue la mama (7 pacientes) y el carcinoma escamoso de piel (6 pacientes). El sitio más común de las metástasis en la piel fue la pared abdominal (21 pacientes). Conclusión: Esta revisión realza la importancia de incluir las metástasis cutáneas dentro del diagnóstico diferencial de las enfermedades con distribución zosteriforme. Se deben considerar las metástasis cutáneas y es necesario realizar una biopsia de piel para confirmar el diagnóstico. Nosotros pensamos que este patrón de enfermedad metastásica es más frecuente de lo recogido en la literatura

Cutaneous metastases from internal malignancies or primary skin cancers are uncommon, and a zosteriform pattern is very rare. In order to elucidate the characteristics of zosteriform metastatic skin cancer we reviewed 38 cases from the medical literature and 1 case seen in our clinic. Methods: The age and sex of each patient, location of the primary tumor, pathology of primary and metastatic lesions, location of the skin cancer and presence of pain were determined for the 39 cases. Results: The most frequent site of the primary tumor was the breast (7 cases) and skin squamous all carcinoma (6 cases). The most common site of the skin metastases was the chest wall (21 cases). Conclusion: This review highlights the importance of including cutaneous metastases within the differential diagnosis of zosteriform eruptions. Skin metastases should be considered and a skin biopsy is necessary to confirm the diagnosis. We think that this pattern of metastatic disease is more frequent than is indicated in the literature

Las complicaciones de la varicela, rara vez consultadas al dermatólogo, un argumento más a favor de la vacunación sistemática / Complications of varicella for which dermatologists are rarely consulted, another argument in favor of systematic immunization

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Apocrine carcinoma, adenopathies, and raised TAG-72 serum tumor marker.

BACKGROUND: The detection of tumor-associated glycoprotein-72 in the serum of patients with carcinomas, basically of the colon, has proved to be of great use in the follow-up of these gastrointestinal adenocarcinomas. RESULTS: We report the case of a male patient presenting adenopathies in the right axilla. The histologic study of an adjacent skin tumor enabled the diagnosis of a cutaneous apocrine carcinoma. Among the studies made, the increase in the serum antibody CA72.4 can be highlighted. The tumor marker was negative after the extirpation of the skin tumor and the axillary adenopathies. CONCLUSION: To our best knowledge, this is the first case in which a tumor serum marker is associated with a cutaneous apocrine carcinoma, a fact that should be confirmed with further patients. Its use in the monitoring of this infrequent skin neoplasia is also noteworthy.

Epidemiología básica para dermatólogos / Basic epidemiology for dermatologists

La epidemiología es la ciencia que estudia la frecuencia de las enfermedades. Los estudios epidemiológicos se dividen en dos grupos, el primero de ellos engloba los dirigidos a determinar la frecuencia de enfermedad y los segundos las asociaciones entre frecuencia y exposición. Se revisan los conceptos básicos del primer grupo de estudios y se describe el segundo tipo con los errores que se presentan más frecuentemente. Se hace especial hincapié en la calidad y validez de los estudios epidemiológicos y en la evaluación y aplicación de los resultados de los estudios de tests diagnósticos (AU)

Linfoma anaplásico de células grandes asociado a ictiosis adquirida / Anaplastic large-cell lymphoma associated with acquired ichthyosis

El linfoma anaplásico de células grandes (LACG) es un linfoma no-Hodgkin de alto grado caracterizado por su morfología celular y la expresión del marcador CD30. Puede dividirse en dos grandes grupos: primario cutáneo y el ganglionar sistémico, el más frecuente. Presentamos un caso de un paciente que consultó por la aparición de unas lesiones pruriginosas en tronco. En la exploración física se objetivó la presencia de máculas rasposas al tacto en tronco y extremidades y la existencia de una masa a nivel cervical, infiltrada, dura, y recubierta de piel eritematosa. El estudio histológico de ambos procesos reveló: una ictiosis adquirida en la piel y un linfoma anaplásico de células grandes ganglionar con extensión subcutánea, respectivamente. El proceso cutáneo siguió un curso paralelo al linfoma, con una remisión parcial de las lesiones tras la quimioterapia y reaparición de las mismas al extenderse el linfoma ganglionar. La ictiosis adquirida es un síndrome paraneoplásico raro, se ha descrito asociado a procesos linfoproliferativos, aunque sólo en cinco ocasiones a linfoma anaplásico de células grandes (AU)

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High variability of HLA-B27 alleles in ankylosing spondylitis and related spondyloarthropathies in the population of northern Spain.

The distribution of B27 alleles (B*2701-23) was characterized by PCR-SSP in ankylosing spondylitis and related spondyloarthropathies (SpA) in a sample of B27 positive patients from northern Spain. Six B27 alleles were identified: B*2705,02,03,07,08 and B*2713. B*2705 and 02 were the most common alleles in the SpA studied: ankylosing spondylitis (AS) (n = 89), reactive arthritis (ReA) (n = 11), psoriatic arthritis (PsA) (n = 29), and inflammatory bowel disease (IBD) (n = 21). B*2707 and B*2708 were found in PsA patients and B*2703 in one patient with IBD. B*2713 was identified in a healthy control family. B*2713 has not been reported to be represented in either ethnic group. Thus, this population shows higher levels of B27 diversity than other Caucasian groups.

Síndrome linfocutáneo por Mycobacterium marinum en un joven aficionado a los acuarios / Lymphocutaneous syndrome due to Mycobacterium marinum in a young aquarium fond

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