Posterior fossa ( Medullablastoma)

Dear Sir,

My 10 year cousin brother was suffering from Vomiting & Headache from last 1.5 month. after all gastrology test doctor did brain CT scan and diagnosed Posterior fossa Medullablastoma size 3.2 * 3.5 cm and said have some water also.

and we are not getting bed in the AIIMS for treatment.

I want to know about this is required surgery or not and some doctor say its cancer but without biopsy how someone can say cancer.

doctors prescribe him some medicine ( Diomox / Dexam / Spiromide / becasule Z / pantaprazole )

and what will be the treatment procedure for this.

Warm Regards
Pradeep Kankarwal
082 8585 9993