TY - JOUR T1 - Triphasic response of pituitary stalk injury following TBI: a relevant yet uncommonly recognised endocrine phenomenon JF - BMJ Case Reports DO - 10.1136/bcr-2018-226725 VL - 2018 SP - bcr-2018-226725 AU - Ansha Goel AU - Freba Farhat AU - Chad Zik AU - Michelle Jeffery Y1 - 2018/10/24 UR - http://casereports.bmj.com/content/2018/bcr-2018-226725.abstract N2 - The triphasic response of pituitary stalk injury has previously been described in a minority of patients following intracranial surgery, however, this phenomenon can also occur after traumatic brain injury. We present the case of a 20-year-old male who experienced the triphasic response of pituitary stalk injury (central diabetes insipidus, syndrome of inappropriate antidiuretic hormone and central diabetes insipidus again) after striking his head on a concrete curb. His history and presentation highlight the importance of recognising the distinctive symptoms of each individual stage of pituitary stalk injury, and using the appropriate diagnostic tools and therapies to guide further management. ER -