Tracheomalacia, timing of symptoms, and thymic enlargement: cause or coincidence?

The authors report a case of severe primary tracheomalacia in a 3-month-old boy. The left lobe of the enlarged thymus was resected at operation to facilitate aortopexy. The authors suggest a possible role for the enlarging thymus contributing to the delayed onset of the symptoms of tracheomalacia, despite the presence of the tracheal lesion from birth.