Question:
A patient presents with absence of the pectoralis major and minor muscles on one side along with ipsilateral syndactyly. What is the most likely diagnosis?
A patient presents with absence of the pectoralis major and minor muscles on one side along with ipsilateral syndactyly. What is the most likely diagnosis?
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Poland Syndrome memory mnemonic: "Poland" = Pectoralis missing + Phalanx anomalies (syndactyly) on the same side.
Always distinguish Holt-Oram by the presence of cardiac septal defects rather than chest wall defects.
Always distinguish Holt-Oram by the presence of cardiac septal defects rather than chest wall defects.
Updated On: Sep 3, 2026
- Poland syndrome
- Klippel-Feil syndrome
- Holt-Oram syndrome
- Sprengel deformity
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The Correct Option is A
Solution and Explanation
Concept:
The clinical presentation describes a classic congenital triad: unilateral hypoplasia or agenesis of the chest wall musculature coupled with ipsilateral upper extremity anomalies.
The clinician must correlate these specific anatomical findings with the correct eponymous congenital syndrome.
Explanation:
• Poland syndrome is a rare congenital anomaly defined precisely by the unilateral absence or underdevelopment of the sternocostal head of the pectoralis major muscle.
• This chest wall defect is frequently accompanied by the absence of the pectoralis minor, amastia (absence of breast tissue), and athelia (absence of the nipple).
• The hallmark upper limb association in Poland syndrome is ipsilateral symbrachydactyly (short, webbed fingers) or simple syndactyly.
• The pathogenesis is widely believed to involve an interruption of the embryonic blood supply via the subclavian artery during the sixth week of gestation.
• In contrast, Klippel-Feil syndrome involves the congenital fusion of cervical vertebrae, presenting with a short neck and restricted head movement.
• Holt-Oram syndrome involves upper limb anomalies (typically radial ray defects like an absent thumb) but is paired with congenital heart defects (ASD/VSD), lacking the defining unilateral pectoralis agenesis.
• Sprengel deformity is a congenital elevation of the scapula, completely distinct from anterior chest wall muscle absence.
Final Answer:
The combination of absent pectoralis muscles and ipsilateral syndactyly is pathognomonic for Poland syndrome.
The clinical presentation describes a classic congenital triad: unilateral hypoplasia or agenesis of the chest wall musculature coupled with ipsilateral upper extremity anomalies.
The clinician must correlate these specific anatomical findings with the correct eponymous congenital syndrome.
Explanation:
• Poland syndrome is a rare congenital anomaly defined precisely by the unilateral absence or underdevelopment of the sternocostal head of the pectoralis major muscle.
• This chest wall defect is frequently accompanied by the absence of the pectoralis minor, amastia (absence of breast tissue), and athelia (absence of the nipple).
• The hallmark upper limb association in Poland syndrome is ipsilateral symbrachydactyly (short, webbed fingers) or simple syndactyly.
• The pathogenesis is widely believed to involve an interruption of the embryonic blood supply via the subclavian artery during the sixth week of gestation.
• In contrast, Klippel-Feil syndrome involves the congenital fusion of cervical vertebrae, presenting with a short neck and restricted head movement.
• Holt-Oram syndrome involves upper limb anomalies (typically radial ray defects like an absent thumb) but is paired with congenital heart defects (ASD/VSD), lacking the defining unilateral pectoralis agenesis.
• Sprengel deformity is a congenital elevation of the scapula, completely distinct from anterior chest wall muscle absence.
Final Answer:
The combination of absent pectoralis muscles and ipsilateral syndactyly is pathognomonic for Poland syndrome.
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