Some opinions of images of the chest X-ray and CT-scanner for the diagnosis of lung paragonimiasis

Lung paragonimiasis is a disease caused by lung flukes characterized by the migration of a juvenile worm in early stage and the formation of cysts around the worm later on. We report a case of pulmonary paragonimiasis in the childhood causing recurrent haemoptysis and pneumonia. The purpose of this study was to describe the radiological manifestations of pulmonary paragonimiasis on chest X-rays and CT-Scans-Peripheral localized, multisegmental infiltration with pleural thickening of lesion, Focal and infiltrative shadows (10-15mm nodules + masslike consolidation). Bollous inflation (excentric thickening of Cyst wall). CT-scans provide more specific information

The role of contrast enhanced computed tomography in the diagnosis of low density pulmonary nodules

Contrast enhanced CT manifestations of 141 pulmonary nodules having internal density less than 40 HU were evaluated to study the prevalence of causative disease and their differential points. Tuberculosis (n = 79) was most common, active in 96%. There were 22 cancers, 10 abscesses, 9 paragonimiases, 8 cysts, 7 metastases, 4 aspergillomas without air meniscus sign, and so on. 35% of the benign lesions were greater than 3 cm in diameter and 67% of benign lesions did not show a smooth outer margin. Lung cysts and aspergillomas showed relatively thin peripheral enhanced rim (PER), sharp transitional zone (TZ), a smooth inner border (IB), and homogeneous low densities (LD). Tuberculous nodules tended to be smaller in size with thin PER and most had smooth IB and homogeneous LD. Paragonimiasis, abscess, and cancer tended to present with thick PER and lobulated IB. Lung abscess and paragonimiasis both showed homogeneous LD and narrow TZ. However, in paragonimiasis, multiple locules were seen. Lung cancer showed wider TZ and heterogeneous LD. The size and outer margin of pulmonary nodules as a diagnostic criteria is less useful in LD pulmonary nodule. Therefore, CT can be more useful in differentiating the benign from the malignant lesions by observing a more specific and characteristic pattern of peripheral enhanced rim, transitional zone, inner border, and homogeneity of low density area.