0
We're unable to sign you in at this time. Please try again in a few minutes.
Retry
We were able to sign you in, but your subscription(s) could not be found. Please try again in a few minutes.
Retry
There may be a problem with your account. Please contact the AMA Service Center to resolve this issue.
Contact the AMA Service Center:
Telephone: 1 (800) 262-2350 or 1 (312) 670-7827  *   Email: subscriptions@jamanetwork.com
Error Message ......
Observation |

Propionibacterium acnes Brain Abscess Appearing 10 Years After Neurosurgery FREE

Sarah M. Kranick, MD; Christopher Vinnard, MD; Dennis L. Kolson, MD
[+] Author Affiliations

Author Affiliations: Departments of Neurology (Drs Kranick and Kolson) and Internal Medicine, and Division of Infectious Disease (Dr Vinnard), University of Pennsylvania Health System, Philadelphia.


Arch Neurol. 2009;66(6):793-795. doi:10.1001/archneurol.2009.75.
Text Size: A A A
Published online

ABSTRACT

Objective  To describe a case of Propionibacterium acnes infection arising 10 years after neurosurgery and to review the literature regarding similar cases and their treatment.

Design  Case report.

Setting  Hospital of the University of Pennsylvania.

Patient  A 70-year-old man with an intracerebral abscess and 2 biopsies culture positive for P acnes 10 years after subdural hematoma evacuation.

Intervention  Surgical biopsy followed by 6 weeks of intravenous vancomycin.

Main Outcome Measures  Magnetic resonance imaging, neurologic examination, and microbiology culture results.

Results  Biopsies obtained from abscesses grew only P acnes. Magnetic resonance imaging and serial neurological examinations showed marked improvement after 6 weeks of intravenous vancomycin.

Conclusions  Infection by P acnes can complicate neurosurgical procedures as late as 10 years after surgery and therefore should be considered in the evaluation of patients presenting with neurologic signs and symptoms with a history of neurosurgery.

Figures in this Article

Propionibacterium acnes is a gram-positive, slowly growing, anaerobic bacillus that commonly colonizes the skin and occasionally causes postoperative wound infections. The identification of P acnes in an infection may be difficult because of its slow growth, making it an important consideration in the differential diagnosis of postoperative infections before confirmation through culture test results. Its indolence has been demonstrated in patients with central nervous system (CNS) infections presenting months to years after intracranial surgical procedures, even without the placement of shunts or other foreign bodies. Here we describe a patient who developed an intracerebral P acnes abscess 10 years after a craniotomy.

REPORT OF A CASE

A 70-year old right-handed man presented with new onset of episodic right arm and leg shaking. He had a history of a traumatic left temporal subdural hematoma requiring evacuation 10 years prior to admission. Although he had no history of seizures, he was subsequently given phenobarbital until his current admission. His shaking episodes were thought to be simple partial seizures, and they resolved with administration of levetiracetam. An initial brain computed tomographic scan revealed no abnormalities. Several days after admission, the patient became obtunded and required intubation. After treatment for aspiration pneumonia and extubation he demonstrated an expressive aphasia and right-sided hemiplegia. Magnetic resonance imaging of the brain showed 2 areas of hyperintense T2 and fluid-attenuated inversion recovery (FLAIR) signal abnormalities with rim enhancement in the left posterior parietal lobe (Figure). These areas became progressively larger and more contiguous over the following 2 weeks, and they demonstrated restricted diffusion and surrounding vasogenic edema. A large sebaceous cyst was observed in the scalp overlying the site of his prior craniotomy.

Place holder to copy figure label and caption
Figure.

Magnetic resonance imaging (1.5 T) of the brain. Fluid-attenuated inversion recovery signal abnormalities are shown in the left posterior parietal lobe before (A) and after (B) 6 weeks of intravenous antibiotics.

Graphic Jump Location

Biopsies of both rim-enhancing areas revealed polymorphonuclear infiltrates and necrosis. Anaerobic cultures from both lesions grew only P acnes. The patient received 6 weeks of intravenous vancomycin, and magnetic resonance imaging performed 4 weeks later revealed some resolution in the T2/FLAIR signal abnormalities, with decreased edema. During subsequent weeks his aphasia and right-sided weakness improved to the level of only a mild residual pronator drift.

COMMENT

We concluded that this patient suffered from a delayed postoperative intracranial P acnes abscess because of the localization of this abscess within his prior operative field and the typically slow and variable growth of P acnes in other reported cases.

Propionibacterium acnes is a likely etiology of infection after intracranial operative procedures because of its prevalence in scalp flora, where it is resides in the anaerobic environment of the hair follicle. In a recent study, the incidence of P acnes in postoperative CNS infections was second only to Staphylococcus aureus in 1587 patients undergoing intracranial procedures.1 It is possible that P acnes may contaminate biopsy specimens as well as neurosurgical fields. However, the growth of only P acnes from microbiologic specimens, along with other evidence of an infectious process, supports a pathogenic role for this organism. It is unclear whether an underlying or acquired immune defect increases the risk of intracranial infection with P acnes following intracranial operations, but this has been suggested.2,3

Most reported cases of P acnes brain abscesses have occurred in association with shunt infections and are less common in the absence of infected hardware.4 More rare are reports of multiple (presumably metastatic) brain abscesses from P acnes in patients who have never had neurosurgical procedures.5

The indolence of CNS infection with P acnes has been well described. In the largest published case series (28 patients),6 the median time from neurosurgical procedure to infection was 54 days, ranging from 12 days to more than 4 years. In this series, there was an additional description of a patient who presented 38 years following a meningioma resection. This patient, who was considered to be an outlier, also had an intracranial abscess at the site of her previous operation. Other case reports and series have described intervals of 18 months2 and 5 years3 between intracranial operation and clinical presentation. Our demonstration of a P acnes brain abscess appearing within a previous intracranial operative field 10 years after the operation is thus consistent with previous findings, but it extends the timeframe for this appearance (10 years) from all but 1 previously reported case. While no such study involving prolonged postoperative intervals can conclusively prove a cause and effect relationship between intracranial operation and subsequent abscess development, the consistency of our findings with previous reports of P acnes infections after prolonged postoperative intervals (albeit less than 10 years) is striking.

Our case and those reported previously raise important considerations for the detection and treatment of P acnes infections in postoperative patients. Propionibacterium acnes isolates derived from the CNS may display a wider susceptibility profile than those from the skin or eye, perhaps because of less previous exposure to antimicrobials. Susceptibility testing of 24 consecutively collected strains of P acnes from CNS sources (13 from subdural empyema, 11 from brain abscesses) found 100% susceptibility to penicillins, cephalosporins, clindamycin, and vancomycin. Consistent with previous studies, there was universal resistance to metronidazole.7 When culture has been obtained in the absence of prior antimicrobial therapy, penicillin G may be the drug of choice after surgical drainage.6 For patients with a penicillin allergy, alternatives would be ceftriaxone or vancomycin. If a patient has received antimicrobial therapy prior to obtaining the microbiologic specimen, one should consider coverage for other common pathogens because of the potential for partial sterilization prior to drainage of the collection(s). This was the rationale for the treatment of this patient with vancomycin rather than penicillin G, although the presence of only P acnes in both abscesses could argue against partially sterilized polymicrobial infection.

This case illustrates the potential for serious CNS complications from postoperative P acnes infections, but also the indolence and potential for delayed diagnosis. The latency to presentation in this case, without other associated risk factors, underscores the importance of considering P acnes infections as a potential pathogen in a patient with focal neurologic findings who has a history of an intracranial operation, even years prior to infection detection. Anaerobic cultures from biopsy specimens must be allowed to grow for several weeks to detect P acnes, and empirical treatment for P acnes should be considered. Because of the susceptibility of P acnes to multiple antimicrobials, these infections are curable. Our case supports the response to treatment shown in other series; in the 6 patients described by Kelly et al,8 1 had a recurrence of infection, and in the 28 patients described by Nisbet et al,6 2 had relapse or reinfection. While there seems to be no true mortality referable to intracranial P acnes infections, few articles in the literature have discussed in detail the morbidity associated with focal neurological deficits due to intracranial abscesses or the recovery of these symptoms after treatment. Our case supports the possibility that with appropriate treatment, even significant neurologic deficits can be recovered.

ARTICLE INFORMATION

Correspondence: Sarah M. Kranick, MD, Hospital of the University of Pennsylvania, Department of Neurology, 3 W Gates, 3400 Spruce St, Philadelphia, PA 19104 (sarah.kranick@uphs.upenn.edu).

Accepted for Publication: August 18, 2008.

Author Contributions:Study concept and design: Kranick and Vinnard. Acquisition of data: Kranick and Kolson. Analysis and interpretation of data: Kranick. Drafting of the manuscript: Kranick and Vinnard. Critical revision of the manuscript for important intellectual content: Kranick, Vinnard, and Kolson. Study supervision: Kranick and Kolson.

Financial Disclosure: None reported.

REFERENCES

McClelland  S  IIIHall  WA Postoperative central nervous system infection: incidence and associated factors in 2111 neurosurgical procedures. Clin Infect Dis 2007;45 (1) 55- 59
PubMed Link to Article
Barazi  SAGnanalingham  KKChopra  Ivan Dellen  JR Delayed postoperative intracerebral abscess caused by Propionibacterium acnes: case report and review of the literature. Br J Neurosurg 2003;17 (4) 336- 339
PubMed Link to Article
Chu  RMTummala  RPHall  WA Focal intracranial infections due to Propionibacterium acnes: report of three cases. Neurosurgery 2001;49 (3) 717- 720
PubMed
Skinner  PRTaylor  AJCoakham  H Propionibacteria as a cause of shunt and postneurosurgical infections. J Clin Pathol 1978;31 (11) 1085- 1090
PubMed Link to Article
Ramos  JMEsteban  JSoriano  F Isolation of Propionibacterium acnes from central nervous system infections. Anaerobe 1995;1 (1) 17- 20
PubMed Link to Article
Nisbet  MBriggs  SEllis-Pegler  RThomas  MHolland  D Propionibacterium acnes: an under-appreciated cause of post-neurosurgical infection. J Antimicrob Chemother 2007;60 (5) 1097- 1103
PubMed Link to Article
Mory  FFougnot  SRabaud  CSchuhmacher  HLozniewski  A In vitro activities of cefotaxime, vancomycin, quinupristin/dalfopristin, linezolid and other antibiotics alone and in combination against Propionibacterium acnes isolates from central nervous system infections. J Antimicrob Chemother 2005;55 (2) 265- 268
PubMed Link to Article
Kelly  MEFourney  DRGuzman  RSadanand  VGriebel  RWSanche  SE Propionibacterium acnes infections after cranial neurosurgery. Can J Neurol Sci 2006;33 (3) 292- 295
PubMed

Figures

Place holder to copy figure label and caption
Figure.

Magnetic resonance imaging (1.5 T) of the brain. Fluid-attenuated inversion recovery signal abnormalities are shown in the left posterior parietal lobe before (A) and after (B) 6 weeks of intravenous antibiotics.

Graphic Jump Location

Tables

References

McClelland  S  IIIHall  WA Postoperative central nervous system infection: incidence and associated factors in 2111 neurosurgical procedures. Clin Infect Dis 2007;45 (1) 55- 59
PubMed Link to Article
Barazi  SAGnanalingham  KKChopra  Ivan Dellen  JR Delayed postoperative intracerebral abscess caused by Propionibacterium acnes: case report and review of the literature. Br J Neurosurg 2003;17 (4) 336- 339
PubMed Link to Article
Chu  RMTummala  RPHall  WA Focal intracranial infections due to Propionibacterium acnes: report of three cases. Neurosurgery 2001;49 (3) 717- 720
PubMed
Skinner  PRTaylor  AJCoakham  H Propionibacteria as a cause of shunt and postneurosurgical infections. J Clin Pathol 1978;31 (11) 1085- 1090
PubMed Link to Article
Ramos  JMEsteban  JSoriano  F Isolation of Propionibacterium acnes from central nervous system infections. Anaerobe 1995;1 (1) 17- 20
PubMed Link to Article
Nisbet  MBriggs  SEllis-Pegler  RThomas  MHolland  D Propionibacterium acnes: an under-appreciated cause of post-neurosurgical infection. J Antimicrob Chemother 2007;60 (5) 1097- 1103
PubMed Link to Article
Mory  FFougnot  SRabaud  CSchuhmacher  HLozniewski  A In vitro activities of cefotaxime, vancomycin, quinupristin/dalfopristin, linezolid and other antibiotics alone and in combination against Propionibacterium acnes isolates from central nervous system infections. J Antimicrob Chemother 2005;55 (2) 265- 268
PubMed Link to Article
Kelly  MEFourney  DRGuzman  RSadanand  VGriebel  RWSanche  SE Propionibacterium acnes infections after cranial neurosurgery. Can J Neurol Sci 2006;33 (3) 292- 295
PubMed

Correspondence

CME
Also Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
Please click the checkbox indicating that you have read the full article in order to submit your answers.
Your answers have been saved for later.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.

Multimedia

Some tools below are only available to our subscribers or users with an online account.

1,934 Views
9 Citations
×

Related Content

Customize your page view by dragging & repositioning the boxes below.

Articles Related By Topic
Related Collections
Jobs