apical cap

ap·i·cal cap

a curved shadow at the apex of one or both hemithoraces on chest x-ray; caused by pleural and pulmonary fibrosis or, on the left, by blood from a traumatic rupture of the aorta.

ap·i·cal cap

(ap'i-kăl kap)
A curved shadow at the apex of one or both hemithoraces on chest x-ray; caused by pleural and pulmonary fibrosis.
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References in periodicals archive ?
Apical cap showing resemblance to pleuroparenchymal fibroelastosis (hematoxylin-eosin, original magnification x40).
The apical caps representing a localized area of subpleural fibrosis occurring predominantly at the apices of the upper lobes can mimic PPFE (Figure 6).
Braunsophila is the most similar to Xestomyza, but can be separated by the following characters: scape much thicker than pedicel in Xestomyza (same thickness in Braunsophila), pair of finger-like extensions on gonocoxite with strong apical setae and apical cap on aedeagus (both features absent in Braunsophila).
13); aedeagus with ventral apodeme long and forked, dorsal apodeme reduced and apical cap extended and wing-like (Figs 16, 17).
The nematocyst has a closed apex; an apical cap of electron-dense material is continuous with the thin electron-dense outer wall of the capsule that underlies the nematocyst membrane.
The pulmonary apical cap (PAC) has been recognized for more than a hundred years as an anatomically and microscopically distinct form of localized scarring, (1) although its etiology still remains a matter of speculation.
They reviewed 183 consecutive lungs from 183 patients at autopsy and noted mural thickening of small muscular pulmonary arteries immediately underneath the lesion in 25 of 48 PACs, while noting this change in the subapical vessels in only 2 of 10 lungs without apical cap.
The pretrochal hemisphere of the apical cap originated most larval structures, such as the apical tuft, also composed of compound cilia (Figs.
A ciliated stomodeum formed on the ventral side of the unciliated ectodermal trunk directly below the apical cap (Figs.
22) Histologically, apical cap represents a localized area of fibroelastosis that is directly subpleural, extending focally into lung parenchyma.
36,37,40) In idiopathic cases, the apical cap is a common incidental radiologic finding, reported as unilateral in 11.