Kernohan-Woltman Notch Phenomenon Caused by Acute Traumatic Subdural Haematoma. Issue 2 (March 2014)

• Record Type: Journal Article
• Authors: Chen, PY; Chen, TY; Lee, YC; Liliang, PC
• Is Part Of: Hong Kong journal of emergency medicine. Volume 21:Issue 2(2014)
• Page Start: 116
• Page End: 119
• Publication Date: 2014-03
• Subjects: Brain neoplasm -- diagnostic error -- diagnostic imaging -- functional laterality -- treatment outcome; Emergency medicine -- Periodicals; 616.02505
• DOI: 10.1177/102490791402100204
• Languages: English
• ISSNs: 2309-5407

Abstract

A 27-year-old man suffered from right hemiparesis after a closed head injury. Computed tomography (CT) revealed a right hemisphere subdural haematoma with midline structure shifted to the left. The CT finding was believed to be mislabeled because the site of haematoma did not correlate with an ipsilateral hemiparesis. Magnetic resonance imaging revealed a right transtentorial uncal herniation and a small lesion within left cerebral peduncle, suggesting Kernohan-Woltman notch phenomenon (KWNP). KWNP has been rarely seen in patients with acute traumatic subdural haemorrhage. Anatomical small maximum tentorial notch width is the possible anatomical factor predisposing our patient to this phenomenon. (Hong Kong j.emerg.med. 2014;21:116-119)