Can you "encase" a soul in a scar?

[gelite67]

No: HPFGUIDX 148404

Slughorn said that to create a horcrux, a person "would encase" the 
torn portion of his soul into something outside of his body.

OK, putting aside my doubts that Harry's scar could be a horcrux b/c it 
is part of Harry's skin and love lives in Harry's skin, which LV can't 
abide, my question is this:

Can you physically "encase" a soul in scar?  

That word "encase" is usually associated with completely surrounding 
something on all sides.  I picture Harry's scar as flat and an horcrux 
as something more 3-D.  But then again, I am not well-schooled in the 
ways of horcruxes!

Just wondered what the more-learned members of fandom thought about 
this.

Angie