Egg shell” calcification is seen in
A. BronchiolitisB. Silicosis
C. Ca. bronchus
D. Sarcoidosis
E. Histoplasmosis
Ans. (B) Silicosis; (D) Sarcoidosis
• Egg cell calcification is peripheral rim calcification of lymphnodes. It is seen in
— Silicosis- Seen approximatly 5% of silicotics. Predominantly hilar lymphnodes may also be observed in anterior or posterior mediastinal lymphnode.
Sarcoidosis-about 5% pt of sarcoidosis present as egg cell calcification.
— Other causes of egg shell calcification
(i) following radiotherapy : appear 1-9 yrs. post radiation.
• Egg cell calcification is peripheral rim calcification of lymphnodes. It is seen in
— Silicosis- Seen approximatly 5% of silicotics. Predominantly hilar lymphnodes may also be observed in anterior or posterior mediastinal lymphnode.
Sarcoidosis-about 5% pt of sarcoidosis present as egg cell calcification.
— Other causes of egg shell calcification
(i) following radiotherapy : appear 1-9 yrs. post radiation.
(ii)Pneumoconiosis-
in 1% cases
