PT - JOURNAL ARTICLE AU - Bridson, James D AU - Newman, Edward J AU - Harris, Helen E AU - Smith, Derek AJ AU - Davenport, Richard J TI - Clinicopathological case: headache and systemic inflammatory illness—Occam vs Hickam AID - 10.1136/practneurol-2020-002548 DP - 2020 Aug 01 TA - Practical Neurology PG - 324--329 VI - 20 IP - 4 4099 - http://pn.bmj.com/content/20/4/324.short 4100 - http://pn.bmj.com/content/20/4/324.full SO - Pract Neurol2020 Aug 01; 20 AB - A 63-year-old woman presented with a sudden headache, which persisted and subsequently changed in character. Over time, constitutional features developed, leading to an unexpected diagnosis. This report documents the clinicopathological conference at the Association of British Neurologists Annual Meeting 2019.