Poland Syndrome with transverse upper limb deficiency: beyond the vascular disruption hypothesis

Key points

• Reported a neonate with Poland syndrome featuring unilateral pectoral deficiency and carpal-level transverse upper limb deficiency.
• The observed phenotype lacked ectodermal elements, which are sometimes associated with Poland syndrome.
• This case challenges the sole reliance on a single-point vascular interruption as the cause of Poland syndrome.
• The findings support an alternative hypothesis involving a dynamic embryonic capillary plexus model.

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