The specimen shows a portion of the vault of the skull infiltrated and thinned by tumour. The
tumour is vaguely nodular in outline and vari-coloured and shows areas of necrosis.
This woman presented at the age of 49 with a two year history of twitching in the left
hand and arm with epileptic attacks. She had a one year history of intermittent double-vision and
a right parietal craniotomy led to what was thought to be the complete removal of an
oligodendroglioma. Three years later there was clinical evidence of recurrence and seven years
later this lesion was removed but she died postoperatively.