<unk>  is a complication of intramuscular<unk> ,  occurring especially often in infants and children.<unk> s are often delivered to the quadriceps, triceps, and gluteal muscles, and thus the complication often manifests itself in those muscles.
Patients are unable to fully flex the affected muscle.  The condition is painless but progressively worsens over time.  Orthopedic surgery is the typical treatment.
Injection fibrosis
Injection site reaction
Scar
Radiation burn
Wound healing
Abscess
Radiation fibrosis
Capsular contracture