<prompt> Honeycombimg of lung in C.X.R. is seen in a R.A.b T.B.c Sclerodermad Carcinomae Interstitial lung diseasebcdeabceacdeabde  <response>: Causes of honeycomb lungCommon causes :- Histiocytosis - X, Scleroderma, RA, Fibrosing alveolitis, Sarcoidosis, ILD, Sarcoidosis, Pneumoconiosis Silicosis, coal miners lung, asbestosis, berylliosis, Tuberculosis.Uncommon causes :-Amyloidosis, chronic interstitial pneumonia, Gauchers disease, neurofibromatosis, tuberous sclerosis. 