Subependymal giant-cell astrocytoma. Case report with ultrastructural study

Area of Science:

• Neuro-oncology
• Pediatric Neurology
• Pathology

Background:

• Tuberous sclerosis is a genetic disorder that can lead to the development of tumors in various organs, including the brain.
• Subependymal giant-cell astrocytomas (SEGAs) are typically benign tumors arising from the brain's ventricular system, often associated with tuberous sclerosis.
• Intraventricular masses can cause significant neurological deficits due to obstruction of cerebrospinal fluid flow.

Observation:

• A 13-year-old male presented with symptoms of an obstructive left lateral intraventricular mass.
• Pathological examination confirmed the mass as a subependymal giant-cell astrocytoma.
• Clinical investigations further corroborated the diagnosis of tuberous sclerosis.

Findings:

• Ultrastructural examination of the tumor revealed features consistent with previously described subependymal giant-cell astrocytomas.
• Novel findings included the identification of tumor cells containing large dense granulated bodies and dense-core vesicles, not previously documented in this tumor type.
• These ultrastructural findings contribute to a deeper understanding of SEGA cellular morphology.

Implications:

• The identification of novel ultrastructural features in SEGA may aid in refining diagnostic criteria and understanding tumor behavior.
• This case highlights the importance of comprehensive histopathological and ultrastructural analysis in diagnosing and characterizing brain tumors, particularly in the context of genetic syndromes like tuberous sclerosis.
• Further research into these unique cellular components could offer insights into potential therapeutic targets for SEGAs.