Discussion of Poland's syndrome
- Congenital partial or complete absence of the pectoralis major muscle
- The inheritance pattern is compatible with an autosomal dominant mutant gene with reduced penetrance or delayed mutation.
- Because of compensation by the surrounding muscles, absence of the musculus pectonalis major may not result in any functional loss.
- Anomalies associated with Poland’s syndrome may include
- Amastia or hypoplasia of the breast
- Thonacic anomalies such as absent costal cartilage of ribs 2, 3, and 4 or 3, 4, and 5.
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 References for Poland's syndrome
- Samuels, TH, Haider, MA, Kirkbride, P. Poland's syndrome: a mammographic presentation. Am. J. Roentgenol. 1996 166: 347-348