subpulmonic effusion

sub·pul·mon·ic ef·fu·sion

a collection of fluid in the pleural space mostly located radiographically between the diaphragm and the basal surface of the lung.
References in periodicals archive ?
On a lateral view, a subpulmonic effusion may have an appearance likened to the "Rock of Gibraltar"--an angulated contour of the lung base with the peak at the oblique fissure (Figure 2).
2), features suggestive of a subpulmonic effusion (lateral peaking of an apparently raised hemidiaphragm) (Fig.