hi dr can u help me? my sis is 6 years old and she had large arachinoid cyst but she didnt have any neurological symptom except difficult talking and decrease of concentration so she  did MRI   show large arachinioid cyst with middline shift to left . she didnt have any medical problem befor .  i consult neurisurgen he tell me she need shunt . my sis did cystoperitoneal shunt from 5 days now she in hospital but she comlpain after operation from vomiting sometime yellowish or light green sputum with out eating and sever frontal heddache that is decrease by adol . i told dr about her status is not well he describe me what he did in OR he told me when inserted the tube more amount of fluid escape out tube so he open 4 hole for drain only and another 4 hole is still not drain, he tell me maybe need another operatin and now my sis under observation she on plasil and antibiotic and omeparzol .   i need ur advice

Summarized question: Is a surgery needed to drain the arachnoid cyst?