please help my sisters son is swolen up. it started with one leg now the other leg too is swollen , he is about 6 to 7 yrs now,he can not walk again, this started about ayear ago, one of the legs is 4-5 sizes bigger and has a small growth that is leaking fluid. he is constantly in pains now, 3 days ago, he started crying about his lower abdomen and his back. i have never seen this type of condition before, please help