1. Cancer of the Lung;DAVIDSON, M.,1930
2. Bristol, John Wright & Sons. DUGUID, J. B., Lancet, I927,2, III. HANF, D., Virchow's Arch., 1927, 264, 366.
3. LEVY SIMPSON, S., Quart. Journ. Med., 1928-9, 22, 43.
4. 13th and x4th;STOCKS, P.;Annual Reports British Empire Cancer Campaign
5. Carcinomata arise most frequently in the main bronchi and their primary divisions, less commonly in the rest of the bronchial tree. The right bronchus is affected rather more commonly than the left. From examinations of the earliest growths it would appear that they most frequently arise at the junction of a bronchial branch with its parent stem. At first the mucosa over the growth is intact and in some cases it remains so to the end. The presence of an early carcinoma is shown by changes in colour, the bronchial mucosa over it being white, greyish-white or pink; often there is a central pale area surrounded by an irregular zone of increased vascularity. The carcinoma usually spreads both up and down the bronchial wall and also round it, some growths form polypous masses which fill or partly fill the lumen. On section the cut surface of the squamous celled growths is usually flat, granular and white with Barnard & T;D. Day, Journ. Path. & Bact