This study evaluated the sensitivity of susceptibility-weighted angiography (SWAN) compared with gradient echo (GRE) sequence in the depiction of haemorrhagic and calcium lesions by virtue of correlation analysis between the number, area and contrast index. The study included 21 patients (15 women, 6 men; age range 18 to 80 years) in whom intracranial haemorrhage or calcifications were previously diagnosed with CT and/or MR. GRE and SWAN sequences were performed as part of a conventional Brain MR study using a 3T scanner. Pathologic findings were: cavernoma (n=8), chronic intraparenchymal haemorrhage (n=5), petechial bleeding (n=3), parenchymal calcifications (n=2), sequelae of haemorrhagic contusion focus (n=1), post-surgical glioma (n=1) and venous angioma (n=1). In eight patients, more lesions were found in the SWAN sequence than in GRE. In the measurement of the largest area, in all cases the measured area was larger in the SWAN sequence than in GRE. The SWAN sequence was reported to have shown higher contrast between the lesion and the healthy white matter than in GRE. The SWAN sequence is more sensitive than GRE in the identification of cerebral haemorrhage and calcifications. The SWAN sequence also obtained significantly larger images than with GRE, and a higher contrast difference between the lesion and the healthy parenchyma.
The purpose of this paper is to show an unusual case of meningioma simulating arachnoid cyst on CT scan and MRI, diagnosed in a 63-year-old woman evaluated for headache and vision disorders. The meningioma shown is predominantly cystic with a small mural nodule enhancing after gadolinium and exhibiting diffusion restriction. Cystic portion of the tumor is hypodense on CT, and evidences fluid signal intensity on T1- and T2-weighted MR imaging.
Introducción: El objetivo de este estudio fue evaluar los cambios morfológicos en la zona intrarticular y extrarticular de la porción larga del bíceps de pacientes sometidos a una tenodesis subpectoral.
Materiales y Métodos: Se incluyeron 9 pacientes con diagnóstico de tendinopatía de bíceps, a quienes se les realizó una tenodesis subpectoral de la porción larga del bíceps. La porción eliminada del tendón del bíceps se colocó en formalina al 10% y se dividió en 2 segmentos. Quedaron definidas la zona proximal, desde la inserción supraglenoidea hasta el borde proximal del pectoral mayor y la zona distal correspondiente a la inserción del pectoral mayor. Los segmentos se tiñeron con hematoxilina y eosina, y se evaluaron histológicamente utilizando el puntaje de Bonar.
Resultados: Macroscópicamente todos los tendones estaban engrosados en la región proximal. En la evaluación histológica, entre las variables más relevantes evaluadas por el puntaje de Bonar, el puntaje de morfología celular en la zona proximal fue significativamente más alto que en la zona distal (p <0,0001).
Conclusiones: Nuestros hallazgos mostraron niveles más altos de patología dentro del bíceps proximal, lo que respalda la eliminación de dicho segmento cuando se realiza un procedimiento para la tendinopatía crónica del bíceps, lo cual se puede lograr con una tenodesis subpectoral.
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