Egg shell calcification seen in silicosis is due to
(a) Hilar lymphnode enlargement > Enlargement of the hilum is common with chronic and accelerated silicosis. In about 5-10% of cases, the nodes will calcify circumferentially, producingso-called "Eggshell" calcification.> This finding is not pathognomonic (diagnostic) of silicosis. In some cases, the pulmonary nodules may also become calcified.
Miscellaneous
Hilar lymphnode enlargement
Pleural thickening
Pulmonary edema
Dilated vessels
Hilar lymphnode enlargement