Poland's Syndrome & Sternal Cleft
Young male patient with Poland's Syndrome (“Agenesis” or congenital absense of the pectoralis major muscle, left-sided) and Sternal Cleft (composite pectus deformity)
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The left nipple is visible, however the left pectoralis major muscle is NOT at all (normal anatomy on the right side)

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Poland's Syndrome (left-sided) along with Sternal Cleft