Egg shell calcifiaction of the hilar nodes is seen in-: (A) Asbestosis, (B) Berylliosis, (C) Silicosis, (D) Coal worker's pneumoconiosis
Answer is C. Eggshell calcification is a radiographic term describing abnormal hilar or mediastinal lymph nodes. According to Fraser and Pare, "Eggshell calcification is uncommon; it consists of a ring of calcification around the periphery of a lymph node and occurs most typically in silicosis. Ref Davidson 23rd edition pg 599