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El cáncer de colon se presenta raramente como fiebre de origen desconocido sin otra sintomatología orientadora. Este artículo reporta un enfermo con fiebre diaria de 38-39 ºC, durante 4 meses y medio a quien se le diagnosticó un adenocarcinoma moderadamente diferenciado de colon ascendente, se le practicó hemicolectomía laparoscópica y se observó resolución del cuadro febril en 48 h. Palabras clave: FOD (fiebre de origen desconocido), adenocarcinoma de colon.

In this work, we report a method to improve the efficiency of the micromechanical cleavage technique to obtain few-layers graphene samples, from natural graphite flakes, which were previously submitted to two chemical treatment times with H 2 SO 4 (17 and 25 hours). After the chemical treatment times, Raman spectroscopy reveals a hydrogenation of the few-layer graphene samples, which were obtained from the treated graphite flakes. To analyze the hydrogenation of the samples, the G and 2D bands of the Raman spectra of the treated and untreated samples were analyzed and compared, as well as the I(2D)/I(G) ratio, revealing a p-doping on the treated samples when compared with the untreated samples. Our studies could be of great importance to obtain larger and greater amount of few-layer graphene samples.

Authors inform on the case of an identical twin patient aged 30 presenting with an extragonadal semimoma of mediastinal location, whose brother died 2 years ago from complications associated with a thoracic surgery to resect a residual tumor mass after chemotherapy from germinal tumor of mediastinal location.

Introduction: today cancer competes with ischemic heart disease as the leading cause of death in Cuba, even far above cerebrovascular disease, accidents, and pneumonia. In many cases, cancer has metastasized and only the primary tumor is only identified in a part of them, while in the rest, the tumor remains "hidden" behind a research considered as "optimal". Objective: to determine, in our context, how often a primary tumor is identified when the cancer has metastasized, the topographical distribution of metastasis sites and histological variants in cases of "hidden" primary. Methods: A cross-sectional, prospective and descriptive study was conducted in the Department of Internal Medicine, at Hermanos Ameijeiras Clinical Hospital from January 2010 to January 2013. The working universe consisted of 100 patients with metastasis with no primary tumor identified as diagnosis of hospitalization, who met the inclusion criteria. Location of primary tumor, met...

Este trabalho não teria sido possível sem o apoio de minha companheira, Mabel, da Secretária do CLAF, Graça Freire, e presidente Dr. Feliciano Sánchez Sinencio, por me prestar todas as informações necessárias para poder obter a bolsa de estudos, a qual permitiu-me chegar ao Brasil (país maravilhoso). Ao meus amigos e ex-colegas de trabalho, Celso de Araujo Duarte e Ivan Ramos Pagnossin, pela paciência em socorrer minhas dificuldades nas medidas experimentais no laboratório, assim como, na parte teórica durante os primeiros anos de estudos. Em especial, meu infinito agradecimentoà prof. a Euzi Conceição Fernandes da Silva, pelo seu tempo perdido na preparação e correção final deste trabalho. Ao meu orientador, prof. Guennadii Michailovich Gusev, por aceitar-me como seu aluno oferecendo-me um plano de trabalho.

Se notificó el caso de una paciente de 47 años, que falleció 12 años después de detectarse metástasis pulmonares múltiples de un tumor de bajo grado de malignidad probablemente metástasico, con un curso clínico relativamente indolente y evolución espontánea. Se pudo determinar la estirpe neuroendocrina del tumor por la aparición, en el último año, de lesiones hepáticas múltiples. No se logró identificar el tumor primario durante el curso de la enfermedad.

A pesar de ser la ectopia renal una anomalía usual y el carcinoma de células claras la neoplasia renal más frecuente, existen muy escasos reportes de presentación simultánea de ambas condiciones. Se notificó una paciente, con estas características, que fue tratada quirúrgicamente y mantuvo una evolución satisfactoria.

El presente manual de economía fue elaborado por los alumnos de la Universidad Nacional de Barranca, con la ayuda del Mg. Econ Juan Carlos Lara Carreño COMPILADORES: Arce Segura, Lucero; Juep Peas, Patricia; López Andino, Marilyn; Tello Zavaleta, Jean Pier; Tinta Viera, Sandra; Trebejo León, Ariana; Varela Carranza, Velia