The major risks of delayed prosthetic breast reconstruction include bleeding and infection. Bleeding or a hematoma can occur and require immediate exploration. Infection may require immediate removal of the implants with drainage tube placement. A deep venous thrombus is associated with calf pain especially upon extension of the foot. Shortness of breath may be a sign of a pulmonary embolus which requires immediate anti-coagulation. Other risks include: skin loss, fat atrophy, capsular contracture (scar tissue around the implant), seroma formation, scarring and ruptured implants.