Unilateral hypertransradiancy in a child with recurrent chest infections

A 3-year-old female child was treated for six recurrent episodes of cough, high grade fever and breathlessness during past one year. Every time total leucocyte counts used to range between 17,000 - 25,000 per mm3 with neutrophils over 80%. Except for diminished breath sounds in left basal region, systemic and chest examinations were normal. Her chest roentgenogram is shown in figure 1. A good quality chest roentgenogram could not be done because of persistent movements of the child.