Amit,

Welcome to OCF, glad you found us, sorry you had to!

At this point I would not worry about what the "cause" of the recurrence is, it happens and as many on these forums can attest to it can be beaten a second and even a third time. Let's focus on getting your mom through the recurrence as that's the only thing worth putting mental and emotional energy into at this moment.

Getting a second opinion from the best medical professionals available is THE most intelligent thing you can do for your mother at this point. Second opinions are just prudence anyway however another set of eyes here from the "BEST" cancer center in your area makes sense.

You are in India and I'm not familiar with your healthcare system however we do have posters on this forum (Eshwar!) that are and can help guide you in this arena. I've sent him a PM regarding your post and I'm sure he'll respond as he's awesome like that.

Most important thing for "you" right now is to breath and do not let fear and worry take over and just take things one step at a time.

Be well

Eric