COMMENTARY Commentary: Comparison Between CTA and Digital Subtraction Angiography in the Diagnosis of Ruptured Aneurysms were 76.7% and 46.4%, respectively. Unfortu- he paper by Philipp et al addresses Sanjay Konakondla, MD nately, other important factors as interobserver the issues of the reliability of diagnostic Clemens M. Schirmer, MD, variability and the conditional flow of infor- T imaging modalities in the setting of mation in therealworld whereanangiogram nontraumatic subarachnoid hemorrhage with PhD is most often a second test following a cross- particular regard to the sensitivity and specificity Department of Neurosurgery and sectional imaging test were not addressed in a of Computed tomography angiography (CTA) Neuroscience Institute, Geisinger Health comprehensive fashion. vs Digital Subtraction Angiography (DSA). With System, Wilkes-Barre, Pennsylvania this retrospective analysis of a large cohort of 401 It hardly comes as a surprise that other attempts preceding this have been published, patients in a single-institution over 4 years, the Correspondence: Clemens M. Schirmer, MD, PhD, authors report an overall CTA sensitivity of 71%. see, for example, MacKinnon et al who derive Department of Neurosurgery and slight different results with CTA had 95.2% In general, it confirms that there are aneurysms Neuroscience Institute, sensitivity, 97.2% specificity, 98.1% positive that
Neurosurgery – Oxford University Press
Published: May 1, 2017
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