“…This group includes the cases of Edwards and Taylor (1938), Scott, Morrow, and Payne (1948), Umiker and Iverson (1954), Titus, Harrison, Clagett, Anderson, and Knaff (1962), Sherwin, Kern, and Jones (1965), Wentworth et al (1968), Dubilier, Bryant, and Danielson (1968), Kaufman, Goldberg, and Tyagi (1968), and Long, Nutt, and MacArthur (1970). These authors make no mention of a papillary element in their cases which is such a feature of the cases of Goorwitch and Madoff (1955), Liebow and Hubbell (1956), Hill and Eggleston (1972), and the present two cases. It is also of interest that, in a paper on pulmonary adenomatosis, Eversole and Rienhoff (1959) illustrate in their fig 1 a lesion which shows a close similarity to the present cases and which they regarded as a form of benign pulmonary adenomatosis.…”