RESUMO
OBJECTIVES: To develop a quantitative and noninvasive method of bone marrow cellularity evaluation in solvent-exposed painters. METHODS: Six painters (mean age 46.5 years, 5 males and one female) with hypocellular marrow, and 132 controls were examined using magnetic resonance imaging (MRI). A full examination of the peripheral blood and a bone marrow biopsy was done on each patient. Signal intensities were measured at the vertebral bodies from T12 to S1 on both the T1- and the T2-weighted image (T1WI and T2WI). Signal indices were calculated by dividing the signal indices of the vertebral bodies by that of the paraspinal muscle and the subcutaneous fat in the same view. RESULTS: The Bone marrow cellularities of the cases painters were between 20.3% and 33.6%. Signal indices based on the muscle at T1WI were greater in the cases of the painters compared to those of the controls (p<0.05, p<0.01). Signal indices based on the muscle at T1WI were significantly higher in older women compared with men (p< 0.05 ) . After adjusting for age and gender, the signal index of cases at S1 based on muscle of T1WI was higher than that of the controls by 0.364. Five of the six cases had a muscle signal index at S1 of T1WI higher than the mean + 1 standard deviation for the same age group and gender. CONCLUSIONS: MR signal indices are influenced by constitutional factors such as fat content, bone density, and the presence of other pathology. However, after adequate adjustment, it can be used as a useful indicator of bone marrow cellularity in a high-risk population.
Assuntos
Feminino , Humanos , Masculino , Biópsia , Densidade Óssea , Doenças da Medula Óssea , Medula Óssea , Leucopenia , Imageamento por Ressonância Magnética , Exposição Ocupacional , Músculos Paraespinais , Patologia , Solventes , Gordura SubcutâneaRESUMO
Vibrio vulnificus infections occur between May and October, and most often involve men over age 40. V. vulnificus has been linked to two distinct syndromes: primary sepsis and primary wound infections. Primary sepsis occurs most commonly in patients with antecedent liver disease such as cirrhosis. Mortality approaches about 50 percent, with most deaths due to uncontrolled sepsis. We experienced a case of septicemia without dermatologic lesion by serovar type O1 V. vulnificus, and reported this case with a review of literature.
Assuntos
Humanos , Masculino , Fibrose , Hepatopatias , Mortalidade , Sepse , Pele , Vibrio vulnificus , Vibrio , Infecção dos FerimentosRESUMO
Congenital acute leukemia is a rare disorder with approximately 200 cases reported. It is defined as a childhood leukemia occurring at birth or before 1 month of age at a rate of 1%. Acute leukemias are generally classified according to morphology, cytochemistry and cell surface marker expression. Most leukemias conform to an ordered lineage-specific pattern of gene expression, but a small subset of leukemias appears not to follow lineage restriction. Several reports revealed a subgroup of acute myelogenous leukemia(AML) that expresses CD7, a cell surface marker expressed early during T lineage differentiation, especially in less differentiated AML subtypes. We report a rare case of CD7(+) congenital monocytic leukemia(M5a) with detailed immunophenotypic and cytochemical characterization in an 8 week-old female. She had central nervous system (CNS) involvement at diagnosis. Chromosomal analysis revealed a mosaicism with 46,XX,-6,de1(7) (q21),t(19;21)(q13.3;q22)/46,XX, that has not been reported.
Assuntos
Feminino , Humanos , Sistema Nervoso Central , Diagnóstico , Expressão Gênica , Histocitoquímica , Leucemia , Mosaicismo , PartoRESUMO
No abstract available.