I have a 6mm syrinx in line noted at c7 level on mri. what does that mean? should i be concerned?

Symptoms?: Syrinx results when cerebrospinal fluid, that normally flows around the spinal cord and brain, collects in central cavity of spinal cord, forms pseudocyst.Most common in cervical area.Pressure on cord - weakness, numbness, stiffness, pain, scoliosi.These symptoms usually come on quite gradually.Relieving pressure may require drainage by neurosurgeon.Large number without any cause.Some congenital.