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ASSISTANT 1 1 THE SURGICAL UNIT, ROYAL ISFIBMAXY, CARDIFF.TIIIS turnour, which I rcmoved from a girl of 16, seems worthy of record bccause bone so rarely occurs in tumours of the spinal meninges.HIsToRY.-The patient was a schoolgirl who for two and a quartcr years had suffered from pain in the back and right side below the costal margin. The onset of pain was followed by a slight limp, and padually her legs became stiff. 'Tingling of the feet' developed, and was followed by a loss of sensation. For six months she had been unable to walk, and for three there had been incontinence of urine and faeces. Professor A. M. Kennedy, under whose care she was admitted, diagnosed spinal tumour involving the lower thoracic segments.OPERATION. -On opcning the dura, lamincctomy revealed an elongated, ovoid, marooncoloured, lobulated tumour (Fig. 479) on the right posterior aspect of the cord, at the level of the 9th thoracic vertebral body. The tumour was intimately incorporated with thc arachnoid and was slightly adherent to the dura, but easily separated from it. It mcasured almost 13 in. in length, and flattened the cord to the shape of a strap.The tumour was removed and recovery was remarkable, the was so in-Fro. 479.-Drawing of the tumour &B it appeared dented. At thc end of three at operation.months the patient could walk unaided and had complete sphincter control. Eighteen months have passed since the operation and there is no evidence of recurrence.?The tumour was found to consist of a very hard core surrounded by ilesliy-looking lobulated inasses similar to those usually seen in spinal endotheliomns. Figs. 480 and 481 show the microscopical appearanccs,