The flexor digitorum superficialis (FDS) is the largest among the superficial flexor muscles situated in the anterior compartment of the forearm and plays a pivotal role in finger flexion, enabling essential hand movements for daily activities. It is known for its complex structure with many anatomical variances (e.g., anomalous muscle bellies, anomalous tendon arrangement, or intermediate tendons) that are still the subject of ongoing research. The clinical significance of the many different anatomic variations of the FDS includes not only atypical findings in physical examinations but also altered use patterns in the injured state, the imitation of soft tissue tumors, and the cause of nerve compression syndromes. Recent anatomical dissection studies resulted in the introduction of the terminus “chiasma antebrachii”, an intersection of the FDS tendons for digit 2 and 3 in the distal third of the forearm. This retrospective study aimed to provide a MRI-based analysis of the prevalence and morphology of the chiasma antebrachii.