Dear Junior_physiotherapist

The difference between structural and acquired deformities?

well, simple really, can the patient correct her posture to what is seemingly a near normal posture? if she can, then this is a postural syndrome,
If she cant, then some aspects of her posture is structural...

you havent said what the clinical problem is really, there are so many people walking about with less than optimal postures, I would say perhaps 99.9999% of the population with no problems...
so again I ask what is the clinical problem...

Pain?, you mentioned breathing difficulties? is this because of her posture (which i believe is contributing) or does she have an underlying respiratory condition...?is she a smoker? whats the family history like?
what does she want herself? postural advice...? again...is it pain?

if you suspect that the problem is structural and she is hoping for cosmetic treatment then you can attempt to correct what you see...otherwise send her to a surgeon and let her go...

without a clinical/functional problem...i dont see why this patient is coming to you anyway...I have a bad posture...i am a fast walker, i cant hold my breath deeply for too long, but i am not seeing a physio...

cheers