Cortical defect of the humerus at the insertion of the pectoralis major.
D003937:Diagnosis, Differential; D006801:Humans; D006811:Humerus / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D010369:Pectoralis Muscles / Q000033:anatomy & histology; D011859:Radiography; D013710:Tendons / Q000033:anatomy & histology