TY - JOUR T1 - Tip of the iceberg in idiopathic intracranial hypertension JF - Practical Neurology JO - Pract Neurol SP - 178 LP - 179 DO - 10.1136/practneurol-2019-002198 VL - 19 IS - 2 AU - Susan P Mollan AU - James L Mitchell AU - Alexandra J Sinclair Y1 - 2019/04/01 UR - http://pn.bmj.com/content/19/2/178.abstract N2 - Lumbar puncture (LP) is a critical part of the diagnostic algorithm to measure opening pressure and contents in all those presenting with raised intracranial pressure (ICP).1–4 Idiopathic intracranial hypertension (IIH) is a diagnosis of exclusion, and at the point of initial presentation, there is no clinically recognised sign that can diagnose IIH above other causes of raised ICP.1–4 Gates et al 5 raise an interesting discussion regarding needle tip type for the LP procedure in those who are diagnosed subsequently with IIH.5 While the first guidelines in IIH1 and the European IIH guidelines2 have recommended that therapeutic serial LPs are not advocated as a long-term treatment strategy for IIH due to the lack of high-quality peer-reviewed evidence,1 2 to … ER -