Congenital absence of the long head of the biceps tendon: a case report

This report outlines the case of a 21-year-old male, found to have a congenital absence of the long head of the biceps tendon (LHBT) following trauma, only the third reported case in this setting without a prior history of shoulder pain or instability and is one of the few cases of congenitally absent LHBT in which the condition was initially detected on magnetic resonance imaging (MRI) prior to arthroscopy. Congenitally absent LHBT may not always present with prior shoulder pain or instability; evidence of abnormality at the bicipital groove or the LHBT on MRI prior to confirmation with diagnostic arthroscopy may aid in diagnosis.