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{{Subdural empyema}}
{{Subdural empyema}}
{{CMG}}; {{AE}} {{JS}}
{{CMG}} {{AE}} {{JS}}; {{AG}}


==Overview==
==Overview==
Subdural empyema, also referred to as [[subdural abscess]], [[pachymeningitis interna]] and [[circumscript meningitis]], is a life-threatening [[infection]].<ref name="AgrawalTimothy2007">{{cite journal|last1=Agrawal|first1=Amit|last2=Timothy|first2=Jake|last3=Pandit|first3=Lekha|last4=Shetty|first4=Lathika|last5=Shetty|first5=J.P.|title=A Review of Subdural Empyema and Its Management|journal=Infectious Diseases in Clinical Practice|volume=15|issue=3|year=2007|pages=149–153|issn=1056-9103|doi=10.1097/01.idc.0000269905.67284.c7}}</ref> It consists of a localised collection of [[pus|purulent]] material, usually unilateral, between the [[dura mater]] and the [[arachnoid mater]] and accounts for about 15-22% of the reported focal intracranial [[infections]].  The [[empyema]] may develop intracranially (about 95%) or in the [[spinal canal]] (about 5%), and in both cases, it constitutes a [[medical emergency|medical]] and [[surgical emergency|neurosurgical emergency]].<ref name="pmid12521560">{{cite journal| author=Greenlee JE| title=Subdural Empyema. | journal=Curr Treat Options Neurol | year= 2003 | volume= 5 | issue= 1 | pages= 13-22 | pmid=12521560 | doi= | pmc=|url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=12521560  }} </ref>
If left untreated, patients with subdural empyema may develop severe [[fever]], [[headache]], [[nausea]], [[vomiting]], and [[seizures]]. Untreated subdural empyema may also lead to [[coma]] and subsequent [[mortality]]. Complications of subdural empyema include [[status epilepticus]], neurological deficits, and [[thrombosis]]. Prognosis is generally good with [[antimicrobial]] therapy.


==Natural History==
==Natural History==
The subdural empyema may develop from two different conditions, according to the age of the individual. In children, subdural empyema is most frequently a complication of [[meningitis]]  while in adults it's more frequently a complication of [[sinusitis]]  [[otitis]] or [[mastoiditis]].  It may also occur as a complication of head trauma or of a neurosurgical procedure. Depending on the source of [[infection]] the etiologic organism will then be different. Subdural empyema is considered a neurological emergency, because if untreated, it frequently evolves into [[coma]] and death. With early diagnosis and appropriate treatment, it usually resolves without further complications. At presentation, patients usually complain of [[fever]], [[headache]], [[nausea]]/ [[vomiting]], [[neck stiffness]] and [[seizures]].  With clinical suspicion of subdural empyema, broad-spectrum [[antibiotics]] should be initiated, until a more specific diagnosis of the etiological agent is known, at which time, therapy should be directed to that agent.
Subdural empyema is considered a [[neurosurgery|neurosurgical]] emergency. If left untreated, subdural empyema frequently evolves into severe [[fever]], [[headache]], [[nausea]], [[vomiting]], [[seizures]], [[coma]], and subsequent [[mortality]].  


==Complications==
==Complications==
Subdural empyema is a condition which, if not treated appropriately and in a timely manner, can progress into serious complications, that may lead invariably to a fatal outcome. An untreated subdural empyema may evolve into: <ref name="AgrawalTimothy2007">{{cite journal|last1=Agrawal|first1=Amit|last2=Timothy|first2=Jake|last3=Pandit|first3=Lekha|last4=Shetty|first4=Lathika|last5=Shetty|first5=J.P.|title=A Review of Subdural Empyema and Its Management|journal=Infectious Diseases in Clinical Practice|volume=15|issue=3|year=2007|pages=149–153|issn=1056-9103|doi=10.1097/01.idc.0000269905.67284.c7}}</ref>
Complications to subdural empyema include:<ref name="AgrawalTimothy2007">{{cite journal|last1=Agrawal|first1=Amit|last2=Timothy|first2=Jake|last3=Pandit|first3=Lekha|last4=Shetty|first4=Lathika|last5=Shetty|first5=J.P.|title=A Review of Subdural Empyema and Its Management|journal=Infectious Diseases in Clinical Practice|volume=15|issue=3|year=2007|pages=149–153|issn=1056-9103|doi=10.1097/01.idc.0000269905.67284.c7}}</ref>
*[[Status epilepticus]]
*[[Status epilepticus]]
*Neurological deficits
*Neurological deficits
*Spreading cortico-venous sinus [[thrombosis]]
*[[Thrombosis]]
*[[Cerebritis]]
*[[Cerebritis]]
*[[Cerebral edema]]
*[[Cerebral edema]]
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*[[Hydrocephalus]]
*[[Hydrocephalus]]
*[[Osteomyelitis]]
*[[Osteomyelitis]]
*[[Mortality]]
*Damage to the [[bridging veins]]
 
There may also be complications from the treatment of the empyema, such as:
*Damage to the [[bridging veins]] during the [[craniotomy]] procedure to evacuate the empyema.


==Prognosis==
==Prognosis==
The outcome is dependent on:<ref name="AgrawalTimothy2007">{{cite journal|last1=Agrawal|first1=Amit|last2=Timothy|first2=Jake|last3=Pandit|first3=Lekha|last4=Shetty|first4=Lathika|last5=Shetty|first5=J.P.|title=A Review of Subdural Empyema and Its Management|journal=Infectious Diseases in Clinical Practice|volume=15|issue=3|year=2007|pages=149–153|issn=1056-9103|doi=10.1097/01.idc.0000269905.67284.c7}}</ref>
Prognosis is generally good with [[antimicrobial]] thearpy. The outcome is dependent on:<ref name="AgrawalTimothy2007">{{cite journal|last1=Agrawal|first1=Amit|last2=Timothy|first2=Jake|last3=Pandit|first3=Lekha|last4=Shetty|first4=Lathika|last5=Shetty|first5=J.P.|title=A Review of Subdural Empyema and Its Management|journal=Infectious Diseases in Clinical Practice|volume=15|issue=3|year=2007|pages=149–153|issn=1056-9103|doi=10.1097/01.idc.0000269905.67284.c7}}</ref>
*Preoperative level of consciousness
*Preoperative level of [[consciousness]]
*Start time of the treatment
*Commencement of treatment
*Treatment aggressiveness
*Treatment duration
*Disease progression
*Disease progression


Patient education is imperative as failure to follow the antibiotic therapy will adversely affect the outcome of the treatment. Identified prognostic factors associated with subdural empyema include:<ref name="AgrawalTimothy2007">{{cite journal|last1=Agrawal|first1=Amit|last2=Timothy|first2=Jake|last3=Pandit|first3=Lekha|last4=Shetty|first4=Lathika|last5=Shetty|first5=J.P.|title=A Review of Subdural Empyema and Its Management|journal=Infectious Diseases in Clinical Practice|volume=15|issue=3|year=2007|pages=149–153|issn=1056-9103|doi=10.1097/01.idc.0000269905.67284.c7}}</ref>
Patient education is imperative as failure to follow antibiotic therapy will adversely affect the outcome of the treatment. Identified prognostic factors associated with subdural empyema include:<ref name="AgrawalTimothy2007">{{cite journal|last1=Agrawal|first1=Amit|last2=Timothy|first2=Jake|last3=Pandit|first3=Lekha|last4=Shetty|first4=Lathika|last5=Shetty|first5=J.P.|title=A Review of Subdural Empyema and Its Management|journal=Infectious Diseases in Clinical Practice|volume=15|issue=3|year=2007|pages=149–153|issn=1056-9103|doi=10.1097/01.idc.0000269905.67284.c7}}</ref>
*Unfavorable Prognostic Factors:
 
#Presenting with encephalopathy or coma
'''Unfavorable Prognostic Factors'''
#Younger than 10 years or elderly
*Presentation with [[encephalopathy]] or [[coma]]
#Late start of antibiotics
*Age: younger than 10 years or elderly
#Sterile cultures
*Delayed commencement of [[antibiotics]]
*Favorable Prognostic Factors:
*[[Burr hole]] placement
#Craniotomy instead of burr holes as surgical procedure
*Sterile cultures
#Early treatment
 
#Young age (optimal between 10-20 years)
'''Favorable Prognostic Factors'''
#Patient presents awake, alert and oriented
*[[Craniotomy]]
#Source of infection: paranasal sinuses
*Early treatment
#Aerobic streptococci isolated in culture
*Young age (optimal between 10-20 years)
#Aerobic streptococci as single pathogen
*Patient presents awake, alert and oriented
*Source of [[infection]]: [[paranasal sinuses]]
*[[Aerobic]] [[Streptococci]] isolated in culture
*[[Aerobic]] [[Streptococci]] as single pathogen


==References==
==References==
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: João André Alves Silva, M.D. [2]; Anthony Gallo, B.S. [3]

Overview

If left untreated, patients with subdural empyema may develop severe fever, headache, nausea, vomiting, and seizures. Untreated subdural empyema may also lead to coma and subsequent mortality. Complications of subdural empyema include status epilepticus, neurological deficits, and thrombosis. Prognosis is generally good with antimicrobial therapy.

Natural History

Subdural empyema is considered a neurosurgical emergency. If left untreated, subdural empyema frequently evolves into severe fever, headache, nausea, vomiting, seizures, coma, and subsequent mortality.

Complications

Complications to subdural empyema include:[1]

Prognosis

Prognosis is generally good with antimicrobial thearpy. The outcome is dependent on:[1]

  • Preoperative level of consciousness
  • Commencement of treatment
  • Treatment duration
  • Disease progression

Patient education is imperative as failure to follow antibiotic therapy will adversely affect the outcome of the treatment. Identified prognostic factors associated with subdural empyema include:[1]

Unfavorable Prognostic Factors

Favorable Prognostic Factors

References

  1. 1.0 1.1 1.2 Agrawal, Amit; Timothy, Jake; Pandit, Lekha; Shetty, Lathika; Shetty, J.P. (2007). "A Review of Subdural Empyema and Its Management". Infectious Diseases in Clinical Practice. 15 (3): 149–153. doi:10.1097/01.idc.0000269905.67284.c7. ISSN 1056-9103.



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