Is This Muscle Flexion Disorder or Dimpling from Breast Lump? (photo)

Thank you for the question and picture. 

I agree with your way of thinking.  Given that the  “dimpling” It is a new physical finding it is in your best interest to have  the breasts fully  worked  up with mammography and ultrasound.  Hopefully, once you have ruled out any concerning lesions you may want to visit with your plastic surgeon to see if encapsulation could be the culprit.

Best wishes. 

From your description and the picture it does look like an animation deformity, which can appear after some time. However, if you have a definite mass in the breast then that should be evaluated. It is possible that the lump you are feeling is a fold in the implant, which sometimes appears at the same time. Assuming the lump is determined to not be an issue, then consider converting to the split muscle plane to correct the deformity.

I have to admit I don't like it. It could be related to flextion of the chest muscle but the line is more transverse than the muscle pull would reflect. The mammogram and ultrasound are the right idea.

Best of luck, peterejohnsonmd.com