Back in the hospital...another surgery...

Jason is in the Childrens National medical center again..T.T
Yesterday afternoon, he developed intractable vomiting.. Jason usually vomits at least once or twice a day so vomiting is not something new to him but yesterday, he was vomiting and retching every couple minutes..
and he was way more fussy and irritable than usual..
So we decided to take him to ER and we took him to the Childrens hospital ER because they have all the medical record.
Because of his complex medical background (brain tumor, VP shunt, chemotherapy) we could get into the exam room right away without waiting.
They did head CT to rule out VP shunt malfunction and found a fluid collection in the right subdural space (that's space kinda between outer brain and skull). They asked us if Jason recently had any head trauma (falling etc) but he didn't.. and we couldn't think of any head injury.
Later, Dr. Yaun from neurosurgery who did Jason's first 2 surgeries explained that when a vp shunt is placed to drain fluid from brain ventricle (center of brain), the pressur is relieved and the once squished brain will resume its shape and size over time.. and sometimes it can create a space in the outer brain, and cerebrospinal fluid (CSF) can build up there, and small blood vessels can pop as brain expands again, and cause some bleeding causing build up of blood and cerebrospinal fluid in that space..
She said on MRI done in April, there was a small fluid collection shown also (I guess oncologists didn't catch it or didn't think it was significant at that time?) but now the fluid collection gotten so big (3cm) pressing on to the brain causing Jason to vomit, and become more irritable and feel sick..

So, he was taken to OR this afternoon..and had a surgery to put an external drain to get rid of this old blood/fluid collection from subdural space.. also his VP shunt was externalized (taken out of his belly) so that they can control the CSF flow from the ventricle, while draining fluid from the subdural area.. I guess a delicate balance has to meet between these two spaces to minimize side effects.. Once the blood/fluid from subdural space is all drained, then doctor will put back his VP shunt into Jason's belly again.. that's another quick surgery 1 week down the road..
He did well during surgery and he's currently recovering in pediatric ICU. He will probably stay in the hospital for about 1 week..
So much for little Jason to go through..T.T
I hope this will be his last brain surgery...T.T

ps. Dr. Yaun told me that she was very impressed that his main tumor in the ventricle gotten so much smaller on today's CT scan. At least we have one good news today...