Published online by Cambridge University Press: 25 February 2010
Characteristics
Congenital absence of the pectoralis major muscle.
May be associated with ipsilateral absence of the pectoralis minor muscle, rib and arm anomalies (syndactyly in the hand).
Autosomal recessive condition.
Clinical features
Most are asymptomatic.
Diagnosis is an incidental finding.
Radiological features
CXR – increased transradiancy of the affected hemithorax. Absence of the normal pectoralis soft tissue shadow.
CT – confirms the absent muscle and normal lung.
Differential diagnosis
Post mastectomy changes.
Unilateral obliterative bronchiolities (e.g. Macleod's syndrome) may mimic Poland's syndrome.
Management
No active management.
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