It appears Round or oval, sharply circumscribed nodule that is seldom more than 4 cm in diameter. Central calcification and â€œsatelliteâ€ lesions are common, as is calcification of hilar lymph nodes.
Note that: Primarily involves the upper lobes (especially the right). The draining bronchus may show irregular thickening or even frank stenosis.
This X-ray shows :Single smooth, well-defined pulmonary nodule in the left upper lobe. In the absence of a central nidus of calcification, this appearance is indistinguishable from that of a malignancy.