“…The neoplastic cells ranged from highly uniform columnar cells down to low cuboidal, anaplastic or dissociated elements; they might be ciliated or non-ciliated, with or without mucinous secretion, with papillary projections or without them, with mitoses present or absent : they might cover the whole alveolar wall or only a part or a short segment of it. In some cases, lymphatic permeation is described, whilst other authors stress its absence (Skorpil, 1941; Ikeda, 1945;Herbut, 1946; Hutchison, 1952;Werner, 1953;Farber et al, 1954;Fanconi, 1956; Gardiol and Jallut, 1956;Eck, 1957; Johansen and Olsen, 1957; Ba16, 1959 ; and others). Thus none of these criteria can be relied upon in the diagnosis of primary alveolar carcinoma.…”