Key points are not available for this paper at this time.
Cryptic cerebrovascular malformations are defined as congenital vascular abnormalities that cannot be demonstrated by angiography. These lesions usually present with hemorrhage and, if special care is taken at operation and with the processing of the pathological material, these lesions can frequently be demonstrated. The present series includes eight examples of cryptic cerebrovascular malformation, with histological confirmation. The relevant literature is reviewed. (Neurosurgery 10:704-714, 1982)
Cohen et al. (1982) studied this question.