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Search Results: 1 - 10 of 5795 matches for " CM; Rozas Reyes "
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Xantogranulomatosis orbitaria: Enfermedad de Erdheim-Chester
Rozas Reyes,P; Se?aris González,A; González Rodríguez,CM;
Archivos de la Sociedad Espa?ola de Oftalmología , 2004, DOI: 10.4321/S0365-66912004001000009
Abstract: case report: a patient was studied because of upper lid bilateral edema and xanthelasmae-like lesions after three years of evolution. during the ophthalmologic examination orange-yellowish lesions and two symmetrical tumours were observed on the temporal part of both upper lids. corticoid-therapy was undertaken which reduced the size of the tumours, however the size increased again after the discontinuation of treatment. a biopsy was performed and lid xanthogranulomatosis was diagnosed. other systemic examinations were normal. discussion: erdheim-chester disease is a xanthogranulomatosis that can affect ocular and periorbital structures. combination of xanthelasmae-like lesions and bilateral orbital masses should make us consider this process and try to locate any associated systemic conditions.
Xantogranulomatosis orbitaria: Enfermedad de Erdheim-Chester Orbit Xanthogranulomatosis: Erdheim-Chester disease
P Rozas Reyes,A Se?aris González,CM González Rodríguez
Archivos de la Sociedad Espa?ola de Oftalmología , 2004,
Abstract: Caso clínico: Paciente con edema bilateral de párpados superiores y lesiones similares a xantelasmas de tres a os de evolución. La exploración oftalmológica mostraba dos tumoraciones temporales simétricas en ambos párpados superiores con lesiones naranjo-amarillentas. Se pautaron corticoides que hicieron disminuir el tama o de las tumoraciones, con recidiva de los mismos al suspender dicha medicación. La biopsia reveló una xantogranulomatosis palpebral. El resto de las exploraciones sistémicas fueron normales. Discusión: La enfermedad de Erdheim-Chester es una xantogranulomatosis que puede afectar a las estructuras oculares y periorbitarias. La combinación de lesiones similares a xantelasmas y masas orbitarias bilaterales deben hacernos pensar en este proceso y buscar la posible afectación sistémica. Case report: A patient was studied because of upper lid bilateral edema and xanthelasmae-like lesions after three years of evolution. During the ophthalmologic examination orange-yellowish lesions and two symmetrical tumours were observed on the temporal part of both upper lids. Corticoid-therapy was undertaken which reduced the size of the tumours, however the size increased again after the discontinuation of treatment. A biopsy was performed and lid xanthogranulomatosis was diagnosed. Other systemic examinations were normal. Discussion: Erdheim-Chester disease is a xanthogranulomatosis that can affect ocular and periorbital structures. Combination of xanthelasmae-like lesions and bilateral orbital masses should make us consider this process and try to locate any associated systemic conditions.
Metástasis coroidea de carcinoma renal Choroidal metastasis from renal cell carcinoma
J Castro Navarro,A Se?aris González,CM González Rodríguez,P Rozas Reyes
Archivos de la Sociedad Espa?ola de Oftalmología , 2004,
Abstract: Caso clínico: Hombre de 52 a os que acudió a urgencias por disminución progresiva de su visión en el ojo derecho. Como antecedentes había tenido nefrectomía derecha por carcinoma renal 7 a os antes y neumonectomía derecha por metástasis 3 meses antes. En la funduscopia se observaba una masa coroidea en ojo derecho, compatible con metástasis. Se realizó enucleación. Durante un a o permaneció sin progresión pero en los últimos seis meses ya ha aparecido. Discusión: Las metástasis coroideas de carcinoma renal son infrecuentes y pueden ocurrir varios a os después de la curación del primario. Su sintomatología es variable y su aspecto poco característico por lo que puede dificultar su diagnóstico diferencial. Case report: A fifty-two year-old man who came to our emergency room because of gradual loss of vision in his right eye. He had suffered right nefrectomy for renal cell carcinoma seven years previously and pneumectomy for metastasis in his right lung three months ago. In the fundus examination a choroidal mass was found in his right eye, suggesting metastasis. Treatment was enucleation of the affected eye. During the first year there was no progression, but in the last six months it has re-appeared. Discussion: Choroidal metastasis of renal cell carcinoma is rare and can appear years after treating the primary tumour. Its symptoms are variable, and its shape is not very characteristic so it can be difficult to make a differential diagnosis.
Metástasis coroidea de carcinoma renal
Castro Navarro,J; Se?aris González,A; González Rodríguez,CM; Rozas Reyes,P; González Casta?o,C;
Archivos de la Sociedad Espa?ola de Oftalmología , 2004, DOI: 10.4321/S0365-66912004001200011
Abstract: case report: a fifty-two year-old man who came to our emergency room because of gradual loss of vision in his right eye. he had suffered right nefrectomy for renal cell carcinoma seven years previously and pneumectomy for metastasis in his right lung three months ago. in the fundus examination a choroidal mass was found in his right eye, suggesting metastasis. treatment was enucleation of the affected eye. during the first year there was no progression, but in the last six months it has re-appeared. discussion: choroidal metastasis of renal cell carcinoma is rare and can appear years after treating the primary tumour. its symptoms are variable, and its shape is not very characteristic so it can be difficult to make a differential diagnosis.
BAFF: Una citoquina reguladora de linfocitos B implicada en autoinmunidad y cáncer linfoide BAFF: A regulatory cytokine of B lymphocytes involved in autoimmunity and lymphoid cancer
Lilian I Reyes S,Francisca León B,M Fernanda Rozas V,Patricia González J
Revista médica de Chile , 2006,
Abstract: BAFF (B cell activating factor belonging to the TNF family) is a cytokine implicated in the survival and maturation of peripheral B lymphocytes and T and B cell activation. BAFF binds to three different receptors: TACI, BCMA and BAFF-R, whose expression is restricted to B and T lymphocytes. BAFF and BAFF-R-deficient mice show a dramatic loss of peripheral B lymphocytes and a severely reduced immune response. In contrast, an enhanced BAFF expression leads to B cell hyperplasia and autoimmunity in mice. In vivo, administration of soluble decoy receptors for BAFF effectively decreases disease progression in various autoimmune mouse models. These evidences render BAFF as a potentially new therapeutic target. Elevated BAFF levels have been detected in the serum of patients with autoimmune diseases, such as Systemic Lupus Erythematosus, rheumatoid arthitis, Sj gren's syndrome, lymphoid cancers and HIV infection. In addition to BAFF receptors, malignant B cells abnormally express BAFF, which attenuates apoptosis through both autocrine and paracrine pathways. The data suggest that an increase in the expression of BAFF induces an enhanced B and T cell activation and the survival of pathologically active B cells. In this article, we review and discuss the participation of BAFF and its receptors in the immune response and its involvement in immunodeficiency, autoimmunity, infections and lymphoid cancers as well as the currently investigated therapies using BAFF antagonists in the treatment of these diseases
BAFF: Una citoquina reguladora de linfocitos B implicada en autoinmunidad y cáncer linfoide
Reyes S,Lilian I; León B,Francisca; Rozas V,M Fernanda; González J,Patricia; Naves P,Rodrigo;
Revista médica de Chile , 2006, DOI: 10.4067/S0034-98872006000900014
Abstract: baff (b cell activating factor belonging to the tnf family) is a cytokine implicated in the survival and maturation of peripheral b lymphocytes and t and b cell activation. baff binds to three different receptors: taci, bcma and baff-r, whose expression is restricted to b and t lymphocytes. baff and baff-r-deficient mice show a dramatic loss of peripheral b lymphocytes and a severely reduced immune response. in contrast, an enhanced baff expression leads to b cell hyperplasia and autoimmunity in mice. in vivo, administration of soluble decoy receptors for baff effectively decreases disease progression in various autoimmune mouse models. these evidences render baff as a potentially new therapeutic target. elevated baff levels have been detected in the serum of patients with autoimmune diseases, such as systemic lupus erythematosus, rheumatoid arthitis, sj?gren's syndrome, lymphoid cancers and hiv infection. in addition to baff receptors, malignant b cells abnormally express baff, which attenuates apoptosis through both autocrine and paracrine pathways. the data suggest that an increase in the expression of baff induces an enhanced b and t cell activation and the survival of pathologically active b cells. in this article, we review and discuss the participation of baff and its receptors in the immune response and its involvement in immunodeficiency, autoimmunity, infections and lymphoid cancers as well as the currently investigated therapies using baff antagonists in the treatment of these diseases
HII Regions in NGC 5055: II. Physical properties
Rozas, M;
Revista mexicana de astronomía y astrofísica , 2008,
Abstract: in this paper, using ccd observations of the galaxy ngc 5055 in the emission lines of hα and hβ (rozas 2007), together with ccd observations in the narrowband filters of [oii], [oiii], [sii], and s[iii] lines we have calculated the equivalent widths, excitations, ionization hardness, ionization parameters and metallicities for the regions catalogued in rozas (2007).
A dynamical model for the spiral galaxy NGC 3359
Rozas, M;
Revista mexicana de astronomía y astrofísica , 2008,
Abstract: in this work we have determined a dynamical model for ngc 3359. this is a strongly barred spiral galaxy with a complex structure, within which we can see an annular zone of intense star formation. in this work we present self consistent numerical simulations of molecular gas in ngc 3359; and using the potential derived from an i band image, we attempt to find the parameters responsible for the kinematics and morphology of the observed gas. the best results are obtained for a two pattern speed model: the central region (up to 15") corresponding to the nuclear bar which rotates with a ωs=100 km s-1 kpc-1; and the main bar + outer spiral, decoupled from the nuclear region, which rotates with a angular velocity, ωp = 27 km s-1 kpc-1. the model successfully reproduces the complex structure in hα of the galaxy in the internal 20" zone, which cannot really be explained with a unique mode pattern.
A dynamical model for the spiral galaxy ngc 3359
M. Rozas
Revista mexicana de astronomía y astrofísica , 2008,
Abstract: En este trabajo, con simulaciones numéricas del medio interestelar, determinamos el patrón de velocidad y construimos un modelo dinámico para NGC 3359. ésta es una galaxia espiral fuertemente barrada y estructuralmente compleja, incluyendo una zona anular con fuerte formación estelar. Presentamos simulaciones numéricas auto-consistentes del gas molecular de NGC 3359, y usando el potencial derivado de una imagen en la banda I, encontramos los parámetros responsables de la cinemática y de la morfología del gas observado. Los mejores resultados se han obtenido con un modelo con dos patrones de velocidad diferentes: la región central (hasta 15′′) que corresponde a la barra nuclear rota con una Ωs = 100 km s 1 kpc 1; y la barra principal, junto con la espiral externa, desacopladas de la región nuclear, que rota con una velocidad angular, Ωp = 27 km s 1 kpc 1. Este modelo reproduce bien la compleja estructura en Hα de la galaxia en la zona interna, la cual no puede ser explicada con un único patrón de velocidad.
Hii regions in ngc 5055. ii. physical properties
M. Rozas
Revista mexicana de astronomía y astrofísica , 2008,
Abstract: En este artículo usamos las observaciones presentadas en Rozas (2007) de la galaxia NGC 5055 en las líneas Hα y Hβ, junto con observaciones CCD con filtros estrechos en las líneas [OII], [OIII], [SII] y S[III] para calcular las anchuras equivalentes, excitación, grados de ionización, parámetros de ionización y metalicidades de las regiones catalogadas en Rozas (2007).
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