REVERSIBLE CEREBRAL VASOCONSTRICTION SYNDROMES AND PRIMARY ANGIITIS OF THE CENTRAL NERVOUS SYSTEM: CLINICAL, IMAGING, AND ANGIOGRAPHIC COMPARISON

Massachusetts General Hospital

The study compares the features of 159 patients with RCVS to 47 patients with PACNS, aiming to develop criteria for prompt bedside diagnosis. It highlights the importance of recurrent thunderclap headache (TCH) and specific neuroimaging findings in distinguishing between these two conditions. The document emphasizes the diagnostic challenges and the potential for misdiagnosis, which can lead to unnecessary procedures.