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Results 1 - 1 of 1 for Unilateral hypoplasia of pectoralis major muscle
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  1. Poland syndrome 
    ... and hand. The extent and severity of the abnormalities vary among affected individuals.People with Poland syndrome are typically missing part of one of the major chest muscles, called the pectoralis major. In most affected individuals, the missing part ...
    https://medlineplus.gov/genetics/condition/poland-syndrome - Genetics