“…These calcifications were regarded as regressive changes (Startz and Abrams, 1938;Wyatt and Farber, 1941 ;Mandeville, 1949). Usually, granular calcifications were seen more or less centrally in the tumour mass (Hastings, Pollock, and Snyder, 1961), but some showed a shell-shaped extension of the calcification (Buschmann and Willich, 1965). Calcification was infrequent in the intrathoracically localized tumours (Hansman and Girdany, 1957;King, Storaasli, and Bolande, 1961).…”