A spectrum of skeletal anomalies associated with pulmonary agenesis: possible neural crest injuries

Area of Science:

• Developmental Biology
• Medical Genetics
• Clinical Case Studies

Background:

• Unilateral pulmonary agenesis is a rare congenital anomaly.
• Associated skeletal and other deformities are frequently observed.
• The inter-relationships between these anomalies require further elucidation.

Purpose of the Study:

• To describe and analyze the spectrum of anomalies in six cases of unilateral pulmonary agenesis.
• To investigate the potential inter-relationships between pulmonary, spinal, rib, and limb deformities.
• To explore the hypothesis that these anomalies may stem from neural crest injuries.

Main Methods:

• Detailed clinical examination and description of six patients with unilateral pulmonary agenesis.
• Comparative analysis with previously reported cases in the literature.
• Examination of associated skeletal (spinal, rib, limb) and other deformities.

Main Results:

• Limb abnormalities, particularly thumb hypoplasia and ipsilateral radial anomalies, consistently occurred on the same side as pulmonary agenesis.
• Spinal deformities included failure of segmentation, primarily involving T1-T3.
• Rib abnormalities were variable and did not consistently correlate with the side of pulmonary agenesis.

Conclusions:

• A consistent association exists between unilateral pulmonary agenesis and ipsilateral upper limb anomalies.
• The findings support the concept of a developmental field defect, potentially related to neural crest injury.
• Further research is warranted to understand the etiology and pathogenesis of this complex condition.