Transcallosal transbiforaminal approach to the third ventricle

Area of Science:

• Neurosurgery
• Neurology

Background:

• Colloid cysts are benign intracranial tumors that can cause obstructive hydrocephalus and sudden death.
• Traditional surgical approaches include endoscopic and microsurgical techniques.
• Bilateral access via the foramen of Monro for third ventricle lesions has not been previously described.

Observation:

• A novel transbiforaminal approach was utilized for colloid cyst removal.
• This technique involves accessing both foramina of Monro after callosotomy.
• Limited manipulation and traction were applied to the third ventricle and surrounding neural structures.

Findings:

• The transbiforaminal approach allowed for safe excision of a solid colloid cyst.
• Tumor control was achieved by operating from the right foramen.
• The patient experienced an uneventful recovery with no memory deficits.

Implications:

• This approach may offer a safer alternative for excising challenging colloid cysts, particularly solid ones.
• Careful surgical strategy, such as right-sided excision, is crucial to preserve memory function.
• Further research into the transbiforaminal approach could refine surgical outcomes for third ventricle lesions.