TY - JOUR T1 - De Novo Aneurysm Formation 6 and 22 Months after Initial Presentation in Two Patients JF - American Journal of Neuroradiology JO - Am. J. Neuroradiol. SP - 1811 LP - 1813 VL - 24 IS - 9 AU - Rick Obray AU - Richard Clatterbuck AU - Alessandro Olvi AU - Rafael Tamargo AU - Kieran J. Murphy AU - Philippe Gailloud Y1 - 2003/10/01 UR - http://www.ajnr.org/content/24/9/1811.abstract N2 - Summary: Two cases of angiographically and surgically documented de novo intracranial aneurysm formation are reported. The first patient, a 32-year-old woman, developed two new aneurysms within a 6-month period, and the second patient, a 27-year-old woman, developed two new aneurysms within a 22-month period. In both patients, the new aneurysms were symptomatic, causing stroke and subarachnoid hemorrhage, respectively. The development of aneurysms de novo over such a short period of time has important implications for periodic imaging in patients considered to be at high risk for intracranial aneurysm formation. ER -