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Query: UMLS:C0018681 (headache)
 56,091 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Thunderclap headache (TCH) is an acute and severe headache that has maximum intensity at onset; TCH can be primary or secondary. Primary TCH is diagnosed when no underlying cause is discovered; however, imaging is crucial in distinguishing secondary causes, which are wide-ranging. The radiologist should be aware of the list of potential diagnoses. Subarachnoid haemorrhage (SAH) is the most common cause of secondary TCH. Aneurysmal SAH accounts for the majority of cases, although other causes should also be considered and these include perimesencephalic haemorrhage, arteriovenous malformations, and dural arteriovenous fistula as well as reversible cerebral vasoconstriction syndrome. Conditions that may present with TCH, with or without SAH include cervical artery dissection and cerebral venous sinus thrombosis. Ischaemic stroke, pituitary apoplexy, and posterior reversible leucoencephalopathy are other potential causes, whereas non-vascular causes include colloid cysts of the third ventricle and spontaneous intracranial hypotension. Imaging features are reviewed with reference to clues gleaned from initial imaging using computed tomography, as well as characteristics that should be sought using magnetic resonance imaging or angiographic imaging.
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PMID:Thunderclap headache: diagnostic considerations and neuroimaging features. 2324 74

Thunderclap headache (TCH) is a sudden severe headache that peaks to maximum intensity within 1 minute. Subarachnoid hemorrhage is the most commonly identified etiology for this headache, however, other secondary etiologies should be considered. Sentinel headache, reversible cerebral vasoconstriction syndrome, arterial dissection, cerebral venous sinus thrombosis, pituitary apoplexy, intracranial hemorrhage, ischemic stroke, reversible posterior leukoencephalopathy, spontaneous intracranial hypotension, colloid cyst, and intracranial infections are other possible causes of TCH. Investigations for the etiology of TCH begin with noncontrast CT head and lumbar puncture. MR brain, CT angiogram, MR angiogram, or CT/MR venogram may need to be performed if the initial investigations are negative. Treatment and prognosis depend on the etiology of the TCH.
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PMID:Thunderclap headache. 2464 27

Thunderclap headache is a common emergency department presentation. Although subarachnoid hemorrhage (SAH) should be the first diagnosis to exclude, reversible cerebral vasoconstriction syndrome (RCVS) is an important alternative cause, which may be commoner than appreciated. Reversible cerebral vasoconstriction syndrome is characterized by multifocal narrowing of cerebral arteries, typically manifested by acute, severe headache with or without neurologic deficits. To compare and discuss the clinical and radiologic characteristics of patients with RCVS. We report 4 cases of RCVS, presenting at a single unit in 1 year. All presented with thunderclap headache, whereas half of them had additional neurologic symptoms such as right homonymous hemianopia, right-sided weakness, and slurred speech. Brain computed tomography was normal in 2 of our patients, but subsequent cerebrospinal fluid analysis revealed xanthochromia consistent with SAH. The remaining 2 patients demonstrated intracerebral hemorrhage on computed tomography. All of our patients underwent digital subtraction angiography that showed segmental narrowing and dilatation of one or more cerebral arteries without any signs of aneurysm. Repeat digital subtraction angiography after 3 months was entirely normal prompting the diagnosis of RCVS. Thunderclap headache requires urgent workup to identify the underlying cause. Although SAH is the most important diagnosis to exclude in the first instance, emergency physicians should be aware of other causes and how they present, such as RCVS. Early recognition of this condition is important in order to remove precipitants, avoid unnecessary investigations, and inform patients about their prognosis.
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PMID:Reversible cerebral vasoconstriction syndrome as a cause of thunderclap headache: a retrospective case series study. 2558 68

Thunderclap headache is a sudden and severe headache that can occur after an aneurysmal subarachnoid hemorrhage (SAH). Subarachnoid hemorrhage is a medical emergency that requires prompt attention and hospitalization. Patients with thunderclap headache often undergo a noncontrast head computed tomography (CT) scan to ascertain SAH bleeding and, if the scan is negative, then undergo a lumbar puncture to look for cerebrospinal fluid (CSF) red blood cells (RBCs), which would be consistent with an aneurysmal leak. If the initial CT is negative and CSF is positive for RBCs, patients are usually admitted to the hospital for evaluation of intracranial aneurysm. We encountered a patient with thunderclap headache whose initial head CT was negative for SAH and whose CSF tested positive for RBCs. The patient was referred to our center for evaluation and management of aneurysmal SAH. However, on careful review of the patient's medical history, serum laboratory values, and spinal fluid values, the patient was diagnosed with Ehrlichia chaffeensis meningitis. While Ehrlichia meningitis is rare, it is important to recognize the clinical clues that could help avoid formal cerebral angiography, a costly and potentially unnecessary procedure. We present how this case represented a cognitive framing bias and anchoring heuristic as well as steps that medical providers can use to prevent such cognitive errors in diagnosis.
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PMID:Ehrlichia Meningitis Mimicking Aneurysmal Subarachnoid Hemorrhage: A Case Study for Medical Decision-Making Heuristics. 2705 85

Thunderclap headache is a severe and acute headache that reaches maximum intensity in under one minute and lasts for more than five minutes. Subarachnoid haemorrhage (SAH) accounts for 10-25% of all thunderclap headaches and, despite advances in medical technology, has a 90-day mortality of 30%. Up to a quarter of cases of SAH are misdiagnosed, often through failure to follow guidance. Thunderclap headaches may be associated with symptoms such as photophobia, nausea, vomiting, neck pain, focal neurological symptoms or loss of consciousness. SAH is more likely if there are neurological abnormalities or reduced consciousness. Loss of consciousness at onset is a poor prognostic indicator with a 2.8-fold increase in risk of death. All patients with suspected SAH should undergo a non-contrast CT brain scan as soon as possible after the onset of pain as the sensitivity of CT drops with time. A negative CT is not sensitive enough to exclude SAH and must be followed with lumbar puncture at least 12 hours after onset of the headache. If SAH is excluded then further investigations, in particular MRI brain and vascular imaging with MRI or CT angiography, should be considered to exclude other aetiologies. Headaches, caused by cervical artery dissection are most commonly of gradual onset but up to 20% of patients complain of thunderclap headache.
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PMID:Rapid diagnosis vital in thunderclap headache. 2733 56

This article reviews the disorders of thunderclap, cough, exertional and sexual headache. These are a group of paroxysmal and precipitated headaches, which often occur in bouts with prolonged remissions. Indometacin seems to be the most effective preventative. Each can occur in primary and secondary form. Thunderclap headache is the most frequently reported headache syndrome associated with a secondary pathology. Discussed are the complexities of whether all patients with thunderclap headache should have further investigation if timely computerised tomography is normal and, the relevance of abnormal imaging in these disorders, differentiating what is deemed to be secondary and managing the pain.
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PMID:Other primary headaches-thunderclap-, cough-, exertional-, and sexual headache. 3213 Apr 97


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