Display of selected value in slicer with multiple data elements

Hi have a slicer which includes the columns from the following table:

The slicer looks like:

When I select the highest level, the display of the selected value makes sense:

When I select a element from the 2nd level, I get the following:

I dont really like the 'Bowel + Colon', as clearly colon is a subcategory within Bowel.

However, the main issue I have (which I hope someone knows how to solve) is how to get rid of the column names (Grouping_LvL1, Grouping_LvL2).

Currently showing --> 'Bowel (Grouping_LvL1) + Colon (Grouping_LvL2)'.

Better                    --> 'Bowel + Colon' 

Even better           --> 'Colon'

Best                       --> 'Colon (within Bowel)'

I hope you have suggestions! I was not able to find anything....