{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,9]],"date-time":"2026-05-09T03:44:36Z","timestamp":1778298276452,"version":"3.51.4"},"reference-count":40,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[1980,2]]},"abstract":"<jats:p content-type=\"fine-print\">\u2713 A case of a cystic encapsulated arteriovenous malformation arising from the tela choroidea of the third ventricle is reported. Although the appearance of this lesion on computerized tomography scan suggested a colloid cyst by its location, it was atypical because of the non-homogeneity both before and after contrast infusion. The increased density on the unenhanced scan was due to hemosiderin pigment in the capsule wall caused by old hemorrhage. 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