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Posterior fossa abscesses secondary to dermal sinus associated with dermoid cyst in children
1Department of Pediatric Surgery, Affiliated Xinhua Hospital, Shanghai Children's Medical Center, Medical College of Shanghai Jiaotong University, Shanghai, PR China.
Insights
Posterior fossa abscesses in children can stem from dermoid cysts linked to dermal sinuses. Early surgical intervention is crucial for successful outcomes and preventing neurological damage.
Area of Science:
- Pediatric Neurosurgery
- Neurology
- Medical Imaging
Background:
- Posterior fossa abscesses are rare, particularly when secondary to dermal sinuses associated with dermoid cysts.
- Dermal sinuses, often presenting as occipital skin dimples, can serve as a pathway for bacterial infections.
Observation:
- Four pediatric cases of posterior fossa abscesses secondary to dermoid cysts and dermal sinuses were analyzed over 15 years.
- Patients presented with increased intracranial pressure and meningitis symptoms due to bacterial infection.
- Computed Tomography (CT) and Magnetic Resonance (MR) imaging were vital in identifying the dermal sinus pathway and intracranial lesions.
Findings:
- Complete surgical resection of the dermoid cyst and abscess was achieved in all cases.
- No neurological sequelae were observed post-intervention.
- Bacterial infection through the dermal sinus was confirmed as the cause of cerebellar abscesses.
Implications:
- Occipital dermal sinuses in children warrant consideration for underlying posterior fossa dermoid cysts.
- Prompt neurosurgical evaluation and intervention, including drainage and resection, are essential for managing these rare conditions.
- Advanced imaging techniques like CT and MR are critical for accurate diagnosis and surgical planning.
Abstract:
We report on the rare disease of posterior fossa abscesses secondary to dermal sinus associated with dermoid cyst in 4 pediatric cases seen over a 15-year of period. All children had a small dimple or a pinhole on the skin of the occipital region. On admission they had the signs of increased intracranial pressure, while 3 of them still suffered from signs of meningitis resulting from a bacterial infection through the dermal sinus. CT scan and MR images revealed both the route of the dermal sinus and intracranial lesions. Total resection was successfully achieved before various treatments in all patients without nervous sequelae. In conclusion, a posterior fossa dermoid cyst should be considered in all children with an occipital dermal sinus. Cerebellar abscesses will arise once bacterial infection has occurred through the associated dermal sinus. Radiological studies such as CT scans and MR images can help confirm the diagnosis and locate the lesions. Early neurosurgical interventions including external ventricular drainage, external abscess drainage and primary removal should be planned as soon as possible in accord with the children's condition.
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