<prompt> Answer this question truthfullyWhat is a cavernous angioma?  <response>: <reason> Cavernous angioma is the second most common form of intravascular malformation next to the developmental venous anomaly DVA. The incidence in the general population is between 0.10.5, and symptoms usually manifest in the third to fifth decade of life. Once thought to be strictly congenital, these vascular lesions have been found to occur de novo. 