The incomplete interlobar fissure sign seen on the upright chest radiograph consists of a perihilar radiolucent area bordered laterally by a concave and blurred border at its periphery.

The main cause of pleural thickening is pleural effusion. Therefore, when it is identified and treated completely, it also means that the pleural effusion stops.

Pleural ultrasound is an imaging diagnostic method aimed at diagnosing diseases in the chest wall such as pleural effusion, pleural tumors or pneumothorax. This method has many advantages and brings convenience and speed to clinicians in the process of diagnosing diseases.