Extensive Ossification in a Pulmonary Plasmacytoma.

Extramedullary plasmacytomata form an interesting group of tumours, the nature and behaviour of which are still not well understood. The majority of such tumours are situated in the pharynx, upper respiratory tract, and conjunctiva (Hellwig, 1943). Less frequent sites have been the thyroid, intestine, ovary, and kidney. A study of the literature available to us has revealed that so far 18 cases (Ackerman, 1953 ; Brunn, 1939; Carson, Ackerman, and Maltby, 1955; Childress and Adie, 1950; Cotton and Penido, 1952; Gordon and Walker, 1944; Hill and White, 1953; Kilburn and Schmidt, 1960; Kuley and Kuntman, 1951; Lane, Krohn, Kolozsi, and Whitehead, 1955; Lisovskii and Grindzhiliya, 1962; Rambaldi, Odoardi, and Vergine, 1959; Robson and Knudsen, 1959; Romanoff and Milwidsky, 1962; Rozsa and Frieman, 1953; Tchertkoff, Lee, and Wagner, 1963; Uvarova and Dubrovaskii, 1962; Viszloy and Dar6czy, 1960) of pulmonary plasmacytoma ('plasma cell granuloma') have been recorded. The purpose of this report is to detail one more case of pulmonary plasmacytoma featuring extensive new bone formation not noted so far in any reported case.