A 12-year old athletic girl fell on the floor after a collision with a teammate during a basketball game. She bruised her right shoulder as well as her right hemithorax.
She stated painful breathing movements located in her right hemithorax, but did not complain about dyspnoea.
During primary examination though, thoracic movement as well as auscultation presented symmetrical. No instability and no misalignment was detectable except a parasternal solid swelling, painful on palpation near the upper thoracic aperture. The abdomen was painless and the abdominal wall relaxed, without bruising. The rest of the body check was normal.