Gynecomastia Crater & Bodyfat %?

   Central craters can be effectively contoured by liposuctioning the surrounding areas to help this blend.  I usually perform this procedure at the same time as excision.

This is a common complication of gynecomastia surgery when only excision is performed.  When only excision is performed breast tissue under the nipple areolar complex is removed down to the muscle.  With this central loss of volume and the surrounding subcutaneous fat intact the crater or doughnut deformity is created.  This is corrected by performing liposuction of the surrounding chest fat.  Regardless of how little fat is present some liposuction is always necessary is prevent this deformity.  This may improve as your % body fat decreases but it may need a revision.

If you had very dense breast tissue and little overlying subcutaneous tissue then you can appear, at least early, a little scooped out on the chest.  The first phase of wound healing is contracture and I frequently see this happening.  In general the pectoralis muscle will expand to improve the contour of your chest.  You may just need more time.  

Please post some photos so we can focus on the situation and not conjecture. My guess is that, if you were to lose weight and if, in fact, there was a "crater", it would appear more pronounced.