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Patient outcomes by modified Rankin Scale scores in the 25 patients with dolichoectatic basilar trunk aneurysms that were managed conservatively initially. The mRS scores at final follow-up refer to those at the end of the observation period, including the preoperative mRS scores of the 4 patients who later went on to surgery. The postoperative mRS scores in these 4 patients are described later in the surgical results. The mRS scores of the 2 patients lost to follow-up were excluded.
