Poland syndrome is a rare disease that affects one in 30,000 births in France. This malformation affects more little boys than girls.
Among the characteristics of the disease, there is a total or partial absence of the pectoralis major muscle, the muscle that is located at the level of the chest, as well as breast hypotrophy.
On the upper limbs, abnormalities of the phalanges and fingers may be associated.
The absence of the pectoralis major muscle in young women results in breasts without volume and projection. In most cases, the breast deformity affects only one breast.