label: Cystic pattern on pulmonary HRCT
label_lc: cystic pattern on pulmonary hrct
description: "On pulmonary high-resolution computed tomography, the cystic pattern is composed by well-defined, round and circumscribed air-containing parenchymal spaces with a well-defined wall and interface with normal lung. The wall of the cysts may be uniform or varied in thickness, but usually is thin (less than 2 mm) and occurs without associated emphysema."