Introduction:

Multifragmentary diaphyseal humeral fractures with proximal extension are infrequent patterns of injury caused mainly by high-energy trauma. The anatomical shape of the humerus, the presence of the deltoid tuberosity and the proximity of the radial nerve to the radial groove represent challenges to be treated, therefore minimally invasive incisions and fracture stabilization with the proximal humeral internal locking system plate are recommended.

Objective:

To establish the efficacy of the minimally invasive plate osteosynthesis technique with helical molding of the proximal humeral plate internal locking system.

Case report:

We report the case of a 29-year-old patient who suffered a traffic accident and had a multifragmentary diaphyseal fracture extended to the proximal humerus. He was treated with the minimally invasive plate osteosynthesis technique and the humeral proximal helical plate internal locking system. He achieved complete consolidation and rapid functional recovery.

Conclusions:

The minimally invasive plate osteosynthesis technique with the humeral proximal helical plate internal locking system is an effective and safe surgical option for multifragmentary diaphyseal humeral fractures with proximal extension, since it preserves the deltoid muscle insertion, improves bone-plate contact with minimal risk of fracture. Axillary and radial neurological injury, promotes bone healing and improves functional outcome.

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