a permanent shortening (as of muscle, tendon, or scar tissue) producing deformity or distortion
contracture
noun(con-trac-ture)
contracture involving a capsule or capsule-shaped structure; specifically : shrinking and tightening of the mass of scar tissue around a breast implant that occurs especially with some silicone implants and may result in pain and in unnatural firmness and distortion of the breast