How to insert a text between two cases in a multi valued function?

I want to do something similar to this but do not know how:

I do know how to write multi-valued functions by using cases or align or whatever but do not know how to achieve a text that is to the right and in the MIDDLE between two cases.

How can this be done?

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If your write $\begin{cases} … \end{cases} \; k > \frac{B}{2};$ you get what you want. But may be it's not the optimal way to do it. – Manuel Jan 19 at 13:11
Those are merely cases, those are just two sub-equations in my opinion. If one wants to align the sub-equations at the =: \left\{\begin{aligned} … \end{aligned}\right. [insert horizontal space if needed] k > \frac{B}{2}; would be the way to go … – Qrrbrbirlbel Jan 19 at 13:27
Thanks alot guys – Muaz Aljarhi Jan 19 at 13:43