Dardo Riveros

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Stroke is a well-documented complication of amphetamine abuse. Methylphenidate, chemically and pharmacologically similar to amphetamines, is widely used in the treatment of attention deficit disorder in children. The possibility of vasculitis connected to methylphenidate should not be surprising. A case is reported of stroke associated with ingestion of(More)
We describe the cytogenetic, fluorescence in situ hybridization (FISH), and molecular findings in a patient who developed a typical chronic lymphocytic leukemia (CLL) 20 months after the diagnosis of a Philadelphia (Ph)-positive chronic myeloid leukemia. Unstimulated bone marrow culture showed a 46,XX,t(9;22)(q34;q11) karyotype, and interphase FISH detected(More)
BACKGROUND The rationale of the present study is based on the property of technetium-SESTAMIBI to enter malignant and other highly metabolic cells, and then to be pumped out of them by the multidrug-resistant (MDR) system, strongly depending on the expression of the MDR-1 gene encoded P-glycoprotein (Pgp-170). METHODS AND RESULTS Forty-one patients with(More)
BACKGROUND A decrease in hemoglobin concentration [Hb] with no apparent cause is frequently observed in critically ill patients. Scarce information is available about this situation in general ward-admitted patients (GWAP). OBJECTIVES To describe [Hb] variation with no obvious cause in GWAP, and to estimate the prevalence and predictors of patients with(More)
Mechanisms leading to decreased platelet count in immune thrombocytopenia (ITP) are heterogeneous. This study describes increased platelet apoptosis involving loss of mitochondrial membrane potential (ΔΨm), caspase 3 activation (aCasp3) and phosphatidylserine (PS) externalization in a cohort of adult ITP patients. Apoptosis was not related to platelet(More)
A boy with umbilical bleeding and severe hemorrhages after minor trauma, without family bleeding history, was studied. Coagulation tests showed abnormalities in FXIII subunits and FVIII/vWF complex. Both parents presented results compatible with a heterozygote state for FXIII deficiency and the father had abnormalities of FVIII/vWF. The propositus was(More)
Abtract Oligonucleotides (ODNs) of the PyNTTTTGT class directly stimulate B lymphocytes and plasma-cytoid dendritic cells of the immune system of primates. Here we investigated the ability of the PyNTTTTGT ODN prototype IMT504 to regulate the expression of surface molecules and apoptosis in human B-chronic lymphocytic leukemia (CLL) cells. The surface(More)