“…Very few cases of upper thoracic tumours have been reported in this context. Forty such cases have been described, including that of Kyrieleis (1931) mentioned above (see review by Dardenne (1967) of cases up to that date, and Arseni and Maretsis, 1967;Nasser and Correll, 1968;Nicola and Nizzoli, 1969;Mittal et al, 1970;Gibberd et al, 1972;Neil-Dwyer, 1973;Luzecky et al, 1974;Ammerman and Smith, 1975). The tumours included 24 of the ependymoma series, and 11 were extramedullary; the types of tumours and their levels are shown in Fig.…”