A previously healthy 12-year-old girl presented with two masses of the left side of the chest wall. She had a 2-month history of cough. A chest roentgenogram obtained at onset of coughing showed an infiltrate. Her cough improved with a 10-day course of oral antibiotics. She later developed painless chest-wall masses, one located posteriorly below the left scapula and the other located below the left nipple. The latter slowly enlarged and became red and tender during a 5-week period. This mass opened and drained pus just before admission (Fig 1). She had no history of fever, malaise, or weight loss. Family history and history of travel and exposure were unrevealing.
Physical examination showed an afebrile, well-appearing girl. The raised anterior chest mass was firm, fixed, red, and tender. It was ovoid, measuring 3×4 cm. The posterior mass was entirely subcutaneous. It measured 4×6 cm and was also firm and fixed,