“…Only three cases have been reported: one by Marcuse and Chamberlin (1956), another by Ellis and Winston (1957) and the third by Dallachy and Simpson (1960). Single cases of tumours of similar structure have been reported in each of the following sites: trachea (McCall and Karam, 1958), larynx (Andrews, 1955), chest wall (Shaw and Kennedy, 1956) and ciliary ganglion (Fisher and Hazard, 1952).…”