Suprasellar/pineal bifocal germ cell tumors

Area of Science:

• Neuro-oncology
• Pediatric oncology
• Neurosurgery

Background:

• Intracranial germ cell tumors (GCT) originate from primitive germinal cells.
• Simultaneous tumors in the suprasellar and pineal regions without dissemination define suprasellar/pineal bifocal germ cell tumors (SPBT).

Purpose of the Study:

• To analyze a specific cohort of SPBT.
• To differentiate SPBT from disseminated GCT.

Main Methods:

• Retrospective review of 25 GCT cases.
• Focus on five SPBT cases.
• Utilized MRI and endoscopic exploration for diagnosis.

Main Results:

• SPBT included four pure germinomas and one germinal non-germinoma.
• Tumor size correlated with endocrine, ocular, and increased intracranial pressure syndromes.
• All SPBT achieved complete remission with chemotherapy and radiotherapy; biopsy was sufficient, and spinal radiotherapy was not required.

Conclusions:

• SPBT are characterized by dual suprasellar and pineal GCT without dissemination.
• The presence of two tumors does not imply metastasis.
• SPBT prognosis and treatment response are comparable to unifocal GCT.