Anatomical Variations in the Extensor Digiti Minimi Tendon: A Case Study and Significance

Background: Anatomical variations of muscle tendons are usually benign, but they may impact various clinical aspects. Case description: On dissection of a formaldehyde 65-year male cadaver's upper extremities, the extensor digiti minimi tendon of the right hand exhibited double slips crossing deep to the extensor retinaculum joining dorsal digital expansion of the little finger. In contrast, the left-hand muscle presented with one tendon. Literature review showed that such variations are not uncommon and may explain symptoms related to pain and/or swellings on the dorsum of the hand. Awareness of students and surgeons to such variations may have clinical significance. Conclusion: Explanation of variations encountered during the laboratory dissection should be discussed among the students to maximize their knowledge about variations and their possible clinical significance.