0peratil.e removal of the growth at a stage when metastasis has not yet occurred, has long been the established method of treatment for malignant turnours. Despite great advances in radiation therapy during the last few decades, it is still necessary, occasionally, in cases of orbital tumours resistant to such therapy, to do a complete exenteration of the orbit (ex. orb.). However, this operation is extremely mutilating, not least from the cosmetic point of view and since the prognosis appears to be very doubtful, the ophthalmic surgeon restricts its use as far as possible. But in order to recognise the limits of this restriction it is necessary to have a fairly clear idea of the results of this method of treatment and therefore an account will be given in this paper of a follow-up of 60 patients, who over a 20 year period had been subjected to the ex. orb. operation under the clinical diagnosis of ))malignant orbital tumourcc. These cases, followed up to 1953 -with the exception of those who died before this datewith a minimum *)For further clinical material that has been placed a t m y disposa! I a m indebted to the kindness of Prof. G.