title: Linear headache: clinical characteristics of eight new cases.
abstract: BACKGROUND
  Linear headache (LH) has recently been described as a paroxysmal or continuous fixed head pain restricted in a linear trajectory of 5-10 mm in width, linking one endpoint in occipital or occipitocervical region with another endpoint in ipsilateral nasion or forehead region. For some patients, this headache had some features resembling migraine without aura.
  
  
  METHODS
  We made a prospective search of patients presenting with a clinical picture comprised under the heading of LH and we have accessed eight new cases. A detailed clinical feature of the headache was obtained in all cases to differentiate with cranial neuralgia, paroxysmal hemicrania, cervicogenic headache, nummular headache and migraine.
  
  
  RESULTS
  The eight LH patients complained of a recurrent moderate to severe, distending, pulsating, or pressure-like pain within a strictly unilateral line-shaped area. The headache duration would be ranged from 1 h to 2 days or persistent for 1-6 months with recurrent worsening of headaches. For some patients, this headache had couple of features similar to that of migraine pattern, such as accompaniments of nausea, vomiting, and phonophobia, diziness, triggering factors of noise, bright night, resting after physical activity, fatigue, menstruation, and response to anti-migraine therapy.
  
  
  CONCLUSIONS
  This description reinforces the proposal of LH as a new headache syndrome or a new variant of a previously known headache syndrome, probably of migraine.
authors.affiliation: Department of Neurology, Epilepsy and Headache Group, the First Affiliated Hospital of Anhui Medical University, Jixi Road 218, Hefei, 230022 China.
authors.forename: Ya-Nan
authors.initials: YN
authors.lastname: Lu
authors.affiliation: Department of Neurology, Epilepsy and Headache Group, the First Affiliated Hospital of Anhui Medical University, Jixi Road 218, Hefei, 230022 China.
authors.forename: Qing-Qing
authors.initials: QQ
authors.lastname: Pan
authors.affiliation: Department of Cardiology, the Second Division Korla Hospital of Xinjiang Production and Construction Corps, Jiaotong Road, Korla, 841000 Xinjiang China.
authors.forename: Jie-Feng
authors.initials: JF
authors.lastname: Pan
authors.affiliation: Department of Neurology, Epilepsy and Headache Group, the First Affiliated Hospital of Anhui Medical University, Jixi Road 218, Hefei, 230022 China.
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.affiliation: Department of Neurology, Epilepsy and Headache Group, the First Affiliated Hospital of Anhui Medical University, Jixi Road 218, Hefei, 230022 China.
authors.forename: Yun-Yun
authors.initials: YY
authors.lastname: Lu
authors.affiliation: Department of Neurology, Epilepsy and Headache Group, the First Affiliated Hospital of Anhui Medical University, Jixi Road 218, Hefei, 230022 China.
authors.forename: Liang-Hui
authors.initials: LH
authors.lastname: Hu
authors.affiliation: Department of Neurology, Epilepsy and Headache Group, the First Affiliated Hospital of Anhui Medical University, Jixi Road 218, Hefei, 230022 China.|Department of Neurology, the Second Division Korla Hospital of Xinjiang Production and Construction Corps, Jiaotong Road, Korla, 841000 Xinjiang China.
authors.forename: Yu
authors.identifier: 0000-0002-9454-9699
authors.initials: Y
authors.lastname: Wang
keywords: Cervicogenic headache; Cranial neuralgia; Epicrania fugax; Linear headache; Migraine; Nummular headache; Paroxysmal hemicrania