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El DC juega un papel importante en todos estos pacientes.<br />

CUERPOS EXTRAÑOS EN LAS PARTES BLANDAS<br />

Las radiografías convencionales solo pueden detectar<br />

los cuerpos extraños radiopacos, no así la ecografía que<br />

permite ver también los cuerpos extraños radiotransparentes.<br />

Los pedazos de madera, aparecen inicialmente hipoecoicos<br />

y al final pueden desaparecer.<br />

Los cuerpos extraños plásticos son menos<br />

ecogénicos que la madera. Por su parte el vidrio y el<br />

metal producen fuertes artefactos de reverberancia (cola<br />

de cometa).<br />

Hay una serie de signos secundarios asociados a los<br />

cuerpos extraños como son: presencia de aire, hematoma,<br />

pus, etc, todos identificables con la ecografía.<br />

El engrosamiento difuso <strong>del</strong> TCS y de las PB muestra<br />

un patrón reticulado, anecoico y desorganizado, producido<br />

por la distensión de los linfáticos. Los abscesos, complicación<br />

frecuente, varían desde una colección libre<br />

anecoica, hasta una lesión heterogénea compleja, con deshechos<br />

internos y tabicaciones. En el Doppler color hay<br />

aumento <strong>del</strong> flujo, predominantemente periférico.<br />

BIBLIOGRAFÍA<br />

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66 Ecografía <strong>del</strong> <strong>Aparato</strong> <strong>Locomotor</strong>

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