ATD is characterized by abnormal development of the rib cage (thorax) resulting in a small thoracic cavity. The characteristic “bell-shaped” chest cavity restricts the growth of the lungs and results in a variable degree of lung hypoplasia and breathing problems (respiratory distress) in the newborn period. Other clinical features that can be apparent at birth include too many fingers and/or toes (polydactyly), mild to mode  Read More

ATD is characterized by abnormal development of the rib cage (thorax) resulting in a small thoracic cavity. The characteristic “bell-shaped” chest cavity restricts the growth of the lungs and results in a variable degree of lung hypoplasia and breathing problems (respiratory distress) in the newborn period. Other clinical features that can be apparent at birth include too many fingers and/or toes (polydactyly), mild to mode  Read More