Angioma of the cerebral membranes
Wellcome Collection

Angioma of the cerebral membranes

Mark, Leonard Portal

CC0 — Public Domain
Wellcome Collection

Ink drawing of an angioma of the cerebral membranes. The tumour consists of a close plexus of blood-vessels, which have an average diameter of an eighth of an inch. The vessels appear to be derived from the vein upon which they lie, reinforced by branches from the neighbouring veins.

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