Poland syndrome is a rare, congenital condition characterized by a sunken or underdeveloped chest and hand abnormalities.

Researchers believe that Poland syndrome is caused
by a mutation in the TBX5 gene.

The condition is named after the Polish physician who first described it in 1869.

The syndrome is characterized by a sunken chest, a short neck, a small chin, a small mouth, a small nose, a small upper lip, a small lower