Physician, West End Hospitalfor Nervous Diseases;

Blood-vessel tumours or angiomata which occur in the brain may be classified under two headings:(i) Malformations of blood-vessels and (2) Haemangioblastomata, or true neoplasms of the elements forming blood-vessels. The former result from a fault in development, and differ from the haemangioblastomata in that they consist of an accumulation of definite, although enlarged, blood-vessels with nervous tissue, intact or com-pressed, between the vascular loops constituting the angioma. It is generally agreed that all types of intra-cranial angiomata are of congenital origin, although often of only slow growth and development. Angiomatous malformations include the following conditions: (a) Telangiectatic angiomata. These are small, mainly capillary, lesions similar to those frequently seen in the skin, and are of no clinical importance as they do not cause symptoms. Such telangiec-tases are discovered only incidentally during post-mortem examinations, and occur most frequently in the floor of the fourth ventricle and in the upper part of the pons.(b) Capillary angiomata involve the meninges and surface of the brain, and frequently co-exist with similar capillary naevi of the face; and some-times of the trunk on the same side of the body. This association is known as the Sturge-Kalischer-Weber syndrome. Sturge, in 1879, reported the case of a girl, aged six years, with an extensive capillary naevus, especially of the right side of the face and head, and focal epileptiform attacks starting in the left hand. He concluded that the right side of the brain was involved in the naevoid condition. Kalischer, in I897, reported a case of diffuse con-genital naevus involving the scalp and face which, on post-mortem examination, showed a lesion described as a blood-vessel tumour composed of capillaries and veins. Parkes Weber, in 1922, reported the radiographic appearances of the skull of a typical case which showed a large capillary naevus involving especially the left side of the face, and a right-sided upper neurone hemiplegia. * Based on a postgraduate lecture given at the Wes