Brainstem micro-abscesses caused by Burkholderia pseudomallei in a 10-month-old infant: a case report

Multiple Abscesses in the Frontal, Temporal and Brainstem regions in a 4.5-year-Old Girl- An Illustrative Case Report

Background

Brainstem located abscesses are rare in the pediatric population. Diagnosis of brain abscess can be challenging as patients may present with nonspecific symptoms and the classical triad of headache, fever, and focal neurological deficit is not always present. Treatment can be conservative or a combination of surgical intervention with antimicrobial therapy.

Case Description

We present the first case of a 4.5-year-old girl with acute lymphoblastic leukemia that developed infective endocarditis (IE) and subsequently developed 3 suppurative collections (frontal, temporal, and brainstem). The patient had negative cerebrospinal, blood, and pus culture growth and subsequently underwent burr-hole drainage of the frontal and temporal abscesses with a 6-week course of intravenous antibiotic therapy with an uneventful postoperative course. At 1 year, the patient is left with minor right lower limb hemiplegia and no cognitive sequelae.

Conclusion

The decision to surgically intervene for brainstem abscesses is dependent on surgeon and patient factors including the presence of multiple collections, midline shift, the aim of source identification in sterile cultures, and the patient's neurological condition. Patients with hematological malignancies should be monitored closely for IE which is a risk factor for hematogenous spread of brainstem located abscesses.

Epidemiology of Neuromelioidosis in Asia-Pacific: A Systematic Review

Introduction: Neuromelioidosis is a rare complication of melioidosis caused by Burkholderia pseudomallei, a Gram-negative bacterium commonly found in soil and surface water. Although cerebral involvement of melioidosis comprises only 4% of total complications, it significantly impacts mortality and morbidity. This study aims to perform a systematic review on various neurological complications of melioidosis in the Asia-Pacific region within the previous 5 years. Method: Systematic search was performed in PubMed, Web of Science databases and Google Scholar on neuromelioidosis complications published from 2015-2019. Results: Central nervous system (CNS) complications comprise 5% of all cases of melioidosis. 16 selected articles were analysed based on its risk factors like diabetes mellitus, chronic renal and lung disease, alcohol abuse, and immunosuppression. Neuromelioidosis is detected 6-14 days after the first presentation and confirmed by detailed investigations. Radioimaging helps to differentiate neuromelioidosis from other diagnoses such as meningitis or brain abscess. The majority of literature recommended 2-week intensive Ceftazidime or Meropenem therapy, followed by 3–6 months Trimethoprim and Sulfamethoxazole oral eradication therapy. Conclusion: Neuromelioidosis is rare, with relatively nonspecific CNS clinical features. Patients or travelers from endemic areas with risk factors should be treated cautiously. Radioimaging modalities aid early microbiological sampling and appropriate antibiotic therapy.

Brainstem abscess treated conservatively

Background:

Brainstem abscess is a rare condition with a variety of treatment approaches. In this paper, we report an unusual case of a brainstem abscess with a positive outcome in an immunocompetent patient who was treated with antibiotic therapy.

Case Description:

A 22-year-old female presented with bilateral tetraparesis that was worse on the left hemibody, appendicular tremor, and left upper eyelid ptosis. Brain magnetic resonance imaging showed an abscess in the pons and midbrain due to possible nocardiosis. She was treated with dexamethasone, phenytoin, vancomycin, and meropenem for 8 weeks and trimethoprim-sulfamethoxazole for 6 weeks. The brain injury decreased, and the patient’s neurological status significantly improved.

Conclusion:

Brainstem abscess may be treated conservatively, leading to improvement of the clinical condition and decreased lesion size on imaging.

Clinical features, microbiology, and management of pediatric brainstem abscess

PURPOSE

Brainstem abscess is a rare condition accounting for merely 1% of brain abscesses incidence in the pediatric population. This study aimed to present a single patient with a pontine abscess and review the literature to highlight clinical features, diagnosis, and management of brainstem abscess.

METHODS

The PubMed database was screened for English-language articles concerning pediatric brainstem abscess. We, therefore, identified 22 publications, which concisely depict 23 cases. Our study reports on the 24th pediatric patient diagnosed with that entity. All included reports were analyzed in terms of clinical presentation, diagnosis, management, and outcomes of described patients.

RESULTS

There was slight women predominance (15:9), with a mean age of occurrence 6.4 years, ranging from 7 months to 16 years. Pons was the most common location of brainstem abscess, occurring in 75% of patients. Clinically, they mostly presented with cranial nerves palsy (79.2%), hemiparesis (66.7%), and pyramidal signs (45.8%). The classic triad of symptoms, including fever, headache, and the focal neurologic deficit was present in 20.8% of patients. Positive pus cultures were obtained in 61.1%. Streptococci and Staphylococci were the most frequently identified pus microorganisms. Outcomes were satisfactory, with a 79.2% rate of general improvement.

CONCLUSIONS

Neurosurgical aspiration is a safe and beneficial therapeutic method. It should always be considered and should promptly be performed when the conservative treatment is not successful and clinical deterioration occurs. Prognosis in pediatric brainstem abscess is generally favorable. Most patients recover with minor neurologic deficits or improve completely.