Hanh, 65, experienced double vision, eye swelling, and drooping eyelids. Doctors discovered a 4x6 cm chordoma deep within his brain.

Thanh, 19, suffering from severe headaches, was diagnosed with a malignant brain tumor. Surgeons used a fluorescent dye technique to clearly visualize the tumor's structure during the operation.

For two weeks, I've had frequent headaches on the right side, accompanied by eye pain, sometimes lasting for hours. What could this be a sign of? Is it dangerous? (Hong Ngoc, Binh Duong)

Mr. Phong, 56, experiencing unilateral hearing loss, was diagnosed with a carotid plexus tumor deep within his skull base.