As we saw before, a simple transudative pleural effusion is anechoic. On the other hand, presence of echogenicities in the effusion is suggestive of complex/exudative pleural effusion. The term ‘plankton sign’ is often used to indicate debris appearing as swirling, punctiform echoes in such effusions and may indicate infection or hemothorax depending on the clinical…
Complex pleural effusion
Nefrología Integral Tijuana 