“…A clinician's opinion about degeneration in a goitre may be quite different from that of a pathologist. It is generally admitted in Europe by Swiss authors (de Quervain, 1940;Wegelin, 1926), as well as by German (Barthels, 1931), British (Dunhill, 1931;Joll, 1932), Russian (Kholdin, 1940), and French workers (Berard and Dunet, 1924;Cuneo, 1938;Herbert, 1936;Velti and Huguenin, 1938), that carcinoma arises in a previous adenoma. American pathological opinion seems to be more divided.…”