Can personality be affected by shunts?

My 29 year old son had colloid cyst/shunt placement 2 yrs ago.  Can depression/mood swings be part of the problem if the shunt is failing to work properly?  What s&s to expect if infection/inflammation v.s cyst growth causing any personality changes.  He had a CT scan 3-4 mo ago after a dirt bike accident which seemed ok. Or  are mood swings more likely mental than physical?   Thanks,

[Michael Lim, MD]

In general, shunt failures usually manifest as sleepiness or severe headaches.  Depression/mood changes are more rare.  I would suggest seeing your primary care doctor to go over his symptoms.