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 ?
22) Histologically, apical cap represents a localized area of fibroelastosis that is directly subpleural, extending focally into lung parenchyma.
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).
36,37,40) In idiopathic cases, the apical cap is a common incidental radiologic finding, reported as unilateral in 11.