One hundred and two (26%) cases developed pneumothorax. Fifty six (54.9%) of these were boys and 46 (45.1%) girls. Pneumothorax was present 66.6% in the right side (Fig. 1), 12.8% in the left side and 0.6% bilateral. In 102 neonates with pneumothorax 51 (54.3%) had respiratory distress syndrome. Therefore, RDS seems to be the most frequent underlying lung disorder, although not the cause of pneumothorax. Frequency of
other pulmonary disorders associated with pneumothorax is listed in Table 1.