3.2 Imaging findings
Prenatal ultrasound did not find any lesions in all six patients according to the medical records and follow-up. Chest X-ray showed translucency of the affected site (Fig. 1A). The CT scan of all the cases showed cystic lesions. According to the CT findings, CCAM was suspected in 66.7% (4/6) cases in present study. The radiographic patterns of PIPE ranged from a cystic lesion or multi-cystic lesion of one or more lobes to a diffuse multi-cystic involvement of all lobes. CT scan of the chest showed a single cyst (Fig. 1B) and bilateral cysts in both lungs (Fig. 1C). The affected site was the right lower lobe in 50% (3/6) patients, the right upper lobe in 16.7% (1/6) patient. The local multi-cystic pattern in 66.7% (4/6) LPPIE cases included a wide range of sizes for the cystic lesions (1.8 to 3.8 cm). However, there are 33.3% (2/6) patients affected both lung lobes.