Which condition may result in a hypoplastic lung?

Which condition may result in a hypoplastic lung?

• A. TTN
• B. Meconium aspiration
• C. Bronchopulmonary dysplasia
• D. Congenital diaphragmatic hernia (CDS)

Answer: (D)

Pulmonary development depends on having enough space in the chest for the growing lung tissue. When a congenital diaphragmatic hernia occurs, abdominal organs herniate into the thoracic cavity during fetal life, occupying space that the lung would normally expand into. This in-utero compression disrupts normal lung growth, leading to pulmonary hypoplasia on the affected side. After birth, the baby may have severe respiratory distress and pulmonary hypertension due to the underdeveloped lung and its abnormal vasculature. Other common neonatal problems like transient tachypnea of the newborn, meconium aspiration, or bronchopulmonary dysplasia don’t typically cause a hypoplastic lung. TTN is about delayed fluid clearance, not underdeveloped lung structure; meconium aspiration causes airway obstruction and inflammation; BPD is a postnatal injury that can lead to chronic lung disease, but not congenital lung underdevelopment.

Pulmonary development depends on having enough space in the chest for the growing lung tissue. When a congenital diaphragmatic hernia occurs, abdominal organs herniate into the thoracic cavity during fetal life, occupying space that the lung would normally expand into. This in-utero compression disrupts normal lung growth, leading to pulmonary hypoplasia on the affected side. After birth, the baby may have severe respiratory distress and pulmonary hypertension due to the underdeveloped lung and its abnormal vasculature.

Other common neonatal problems like transient tachypnea of the newborn, meconium aspiration, or bronchopulmonary dysplasia don’t typically cause a hypoplastic lung. TTN is about delayed fluid clearance, not underdeveloped lung structure; meconium aspiration causes airway obstruction and inflammation; BPD is a postnatal injury that can lead to chronic lung disease, but not congenital lung underdevelopment.