Browsing by Autor "Pierina Petrosino"

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Angiomiolipoma renal. Reporte de un caso
(Universidad de Los Andes, 2015) A. Rivas; Pierina Petrosino; Asmiria Arenas de Sotolongo; Malvy Maldonado Alviarez; Miguel Rodriguez
Renal angiomyolipoma is a benign tumor composed of smooth muscle cells, adiposetissue and abnormal blood vessels. It is a rare tumor, representing only 1% to 2% of all tumorsin the kidney with an incidence of approximately 0.3-3%. Most cases are sporadic (approximately80%) and is usually diagnosed in adults with an average age of 40 years. It affectspredominantly females with a female to male ratio of 4:1. In tumors less than 4 cm, the majorityof patients are asymptomatic and the diagnosis is incidental. The triad including lower backpain, palpable mass and hematuria is infrequently present. The treatment of renalangiomyolipomas measuring less than 4 cm, in most cases, is conservative. In symptomaticpatients and in tumors greater than 4 cm, selective arterial embolization or partial/ radicalnephrectomy is recommended. The objective of this article is to describe the clinical andpathological features of renal angiomyolipomas since our review of the regional and nationalscientific literature did not revealed much information about this interesting tumor.
Carcinoma de tiroides en niños y adolescentes
(2008) Francisco Cammarata‐Scalisi; Pierina Petrosino; Asmiria Arenas de Sotolongo; Melisse Milano; Frances Stock; Yorli Guerrero
Summary Thyroid carcinoma is not frequent in the first two decades of life. It is estimated that 10% of the total cases of thyroid carcinoma occur within this age range. There is a female predominance and the majority the papillary type. Clinical and pathological characteristics of 11 patients with thyroid cancer under 20 years of age were studied: studies showed the papillary type in all of them. There is a female predominance with a ratio of 2.67:1. All patients underwent surgical treatment; additionally eight patients were treated with 131iodine. The survival rate was 70 % after 4.6 years. The presentation and outcome of thyroid carcinoma in pediatric patients differs from that in adults requiring a multidisciplinary treatment.
Gliosarcoma: Un Tumor Cerebral Poco Común
(Universidad Internacional de La Rioja, 2014) E De La Vega; Lauddy S. Zambrano; Melisse Milano; Pierina Petrosino; Asmiria Arenas de Sotolongo
Gliosarcoma, a rare brain tumorAbstract The Gliosarcoma (GS) is an aggressive primary neoplasm and rare in central nervous system (CNS), composed of anaplastic astrocytic and mesenchymal elements clearly malignant. The clinical picture is characterized by headaches and seizures, presented as part of the initial symptoms in 30% of patients whose percentage increases as the disease progresses. Among the secondary manifestations, described changes as impaired concentration and personality of lesions particularly affecting the parietal lobe is associated with motor or sensory deficit. As for the MRI diagnosis, malignant gliomas are observed well-circumscribed with focal edema and capture the contrast in the periphery with a hypointense center. A case of male patient aged 45, whose clinical and imaging findings are consistent with those previously described by what is proposed the diagnosis of right parietooccipital glioma. When performing exeresis of the tumor histopathology was performed, which was reported as a glioblastoma multiform, and subsequent immunohistochemical analysis concluded definitively as a gliosarcoma. The low frequency of this pathological entity and the impact on morbidity and mortality of patients with the disease led to the filing of this case.
Higroma quístico fetal: Reporte de un caso
(2003) Lenin Montilla; Pierina Petrosino; Asmiria Sotolongo; María Luisa de Uzcátegui; Franklin Moreno; Julieta de Castillo
Meningiomas en edad pediátrica. Presentación de dos casos
(Universidad Internacional de La Rioja, 2010) Francisco Cammarata‐Scalisi; Frances Stock; Eduardo Zambrano; Melisse Milano; Asmiria Arenas de Sotolongo; Pierina Petrosino
Introduction: Meningiomas are central nervous system\nneoplasms derived from arachnoid cap cells; they are very rare in \nchildren and exhibit different behavior clinical-pathologic in \npatients of this age group. Case report: We reported two cases of \nmeningiomas in pediatric patients, the first grade II of clear-cell \nintraspinal and the second grade III papillary with findings focal \nrhabdoid, metastatic intracranial, that correspond infrequent \nhistopathology variants of aggressive behavior and thus \nexplaining the increased recurrence rate despite the multimodal \ntreatment. Comments: Due to the high proportion of \nhistological subtypes of malignant meningiomas in the pediatric \nage, the histopathology diagnosis is necessary, following the \ncriteria of classification of grading of the World Health \nOrganization to consider the treatment and exhaustive\nmonitoring.
Meningiomas in pediatric age. Presentation of two cases
(2010) Francisco Cammarata‐Scalisi; Frances Stock; Eduardo Zambrano; Melisse Milano; Asmiria Arenas de Sotolongo; Pierina Petrosino
Introduccion: Los meningiomas son neoplasias del sistema nervioso central derivados de la capa de celulas aracnoideas. Son infrecuentes en ninos y exhiben un comportamiento clinicopatologico diferente en pacientes de este grupo de edad. Casos Clinicos: Se reporta dos casos de meningiomas en pacientes pediatricos, el primero grado II de celulas claras en medula espinal y el segundo grado III papilar con hallazgos rhabdoides focales intracraneal metastasico, que corresponden a variantes histopatologicas infrecuentes de comportamiento agresivo y eso explica el incremento de recurrencia a pesar de tratamiento multimodal. Discusion: Debido a la alta proporcion de meningiomas de subtipos histologicos malignos en la edad pediatrica, es necesario su diagnostico histopatologico siguiendo los criterios de la clasificacion de grados de la Organizacion Mundial de la Salud para tener en cuenta el tratamiento y seguimiento exhaustivo.
Tumor mülleriano mixto heterólogo primario de trompa uterina
(2015) Nazira Monsalve; Manuel Filipe Santos; Pierina Petrosino; Asmiria Arenas; Zahimar Sánchez