[Diffuse bithalamic astrocytomas in children and adults].

Area of Science:

• Neuro-oncology
• Pediatric neurosurgery
• Neuroradiology

Context:

• Diffuse bithalamic gliomas are rare brain tumors affecting both thalami.
• Few cases have been documented, necessitating further research into their characteristics and management.
• This study analyzes data from 13 patients treated between 2004 and 2011.

Purpose:

• To describe the clinical, radiological, and histological features of diffuse bithalamic gliomas.
• To evaluate the efficacy of current treatment modalities, including surgery, radiation, and chemotherapy.
• To determine the prognostic factors influencing patient outcomes.

Summary:

• Diffuse bithalamic gliomas present as symmetric thalamic enlargement on MRI, often extending to adjacent structures.
• Histologically, these tumors are classified as astrocytomas (Grade II-IV).
• Treatment strategies include stereotactic biopsy for diagnosis, radiotherapy, chemotherapy, and CSF diversion for hydrocephalus. Surgical excision is generally contraindicated due to poor outcomes.

Impact:

• This research highlights the challenging nature of diffuse bithalamic gliomas and underscores the need for multimodal treatment approaches.
• The findings suggest that most patients have an unfavorable prognosis, with only temporary tumor stabilization observed with adjuvant therapies.
• Understanding the natural history and treatment responses is crucial for improving patient management and outcomes in this rare condition.