Kategoria: Elbow (EN)

Polish version: Zerwanie ścięgna bicepsa przy łokciu — kiedy potrzebna jest operacja?

Sudden pain at the front of the elbow after a forceful pull or while lifting, a noticeable “pop,” rapidly developing bruising and a clear loss of strength when turning the palm upward may indicate a distal biceps tendon rupture. A complete rupture in an active person is often treated surgically, but not every injury requires an operation. The extent of the tear, age, activity level, functional demands and coexisting medical conditions all matter.

What actually tears?

The biceps brachii ends near the elbow in a strong tendon that attaches to the radius. This tendon contributes not only to elbow flexion but especially to forearm supination—the movement that turns the palm upward.

Rupture most often occurs when a large sudden load is applied to an extended or extending elbow, for example while trying to catch or hold a falling weight. The injury may be complete or partial.

What symptoms are typical?

• sudden pain at the front of the elbow, often during heavy loading,
• a popping sensation or sound,
• swelling and bruising in the elbow crease or forearm,
• a change in the contour of the biceps, with the muscle belly sometimes retracting slightly upward,
• reduced elbow-flexion strength,
• particularly noticeable weakness when turning the forearm palm-up, such as when using a screwdriver or loosening a tightly fastened object.

Pain may improve considerably after several days, but less pain does not mean that the tendon has reattached. With a complete rupture, a persistent loss of strength—especially in supination—may remain.

Does every rupture look dramatic?

No. A partial tear may present mainly as pain at the front of the elbow during exertion, without extensive bruising or an obvious change in muscle contour. Persistent pain in this area should therefore not automatically be labelled as tennis elbow or golfer’s elbow.

Tennis elbow usually causes pain on the lateral side of the elbow, while golfer’s elbow is typically medial. Pain directly at the back of the elbow has a different differential diagnosis again. The location and mechanism of symptoms are therefore important.

How is a distal biceps tendon rupture diagnosed?

The starting point is the history and clinical examination. The clinician assesses the contour of the muscle, bruising, elbow-flexion and supination strength, and uses tests aimed at tendon continuity, including the Hook test.

Ultrasound

Ultrasound can rapidly assess tendon continuity, the site of injury, retraction of the torn end and some partial tears. The distal biceps tendon is technically demanding to examine because of its deep position and twisted course, so operator experience matters.

MRI

MRI is particularly useful when the clinical picture or ultrasound findings are inconclusive, when a partial tear is suspected, or when the degree of retraction and other structures around the elbow need more detailed assessment. A patient with a clinically typical complete rupture does not necessarily need MRI as the first diagnostic test.

When can non-operative treatment be reasonable?

Non-operative treatment can be appropriate for some partial tears, for people with relatively low strength demands, or when the risks of surgery are greater than the expected benefit. Initial management includes reducing load and controlling pain, followed by gradual restoration of movement and strengthening.

The possibility of persistent weakness should be understood. Meta-analyses of complete ruptures have found that operative treatment provides greater average flexion strength and, in particular, greater supination strength than non-operative care. Most of this evidence is observational, however, and the non-operative groups were much smaller, so the decision should not be reduced to a single percentage from a pooled analysis.

When does an orthopaedic surgeon consider surgery?

Tendon repair is most often considered for a complete rupture in an active patient who wants to recover as much elbow-flexion and forearm-supination strength as possible. This is especially relevant for people who perform physical work, strength training or sports that place substantial demands on the upper limb.

Assessment should not be postponed for many weeks simply because the pain has improved. Over time, the torn tendon may retract and scar, making primary repair more difficult. Chronic cases may occasionally require a more complex reconstruction using a graft.

Surgery also carries risks, including temporary sensory disturbance from irritation of cutaneous nerves and, less commonly, motor nerve injury, heterotopic ossification or loss of motion. The expected gain in strength therefore needs to be weighed against the risks of the procedure.

What does return to activity look like?

After tendon repair, the reattachment is initially protected while movement is restored gradually. Strengthening is introduced later according to the surgeon’s protocol and progress of healing. Return to heavy loading is usually measured in months rather than weeks.

In a systematic review of 42 studies involving more than 1,000 patients after surgical repair, about 91% returned to sport, with a mean time to return of approximately 6 months. These are pooled figures from very different patient groups and should not be treated as a fixed deadline for an individual patient.

When is urgent assessment needed?

After a recent injury suspicious for tendon rupture, orthopaedic assessment should be arranged without unnecessary delay, particularly after a characteristic pop, extensive bruising or a clear loss of strength. More urgent medical attention is warranted if there is increasing numbness or weakness of the hand, a cold or pale hand, abnormal pulses, very rapid severe swelling, an open wound, or an injury in which a fracture is also suspected.

Key takeaways

A distal biceps tendon rupture is different from the common overuse disorders that cause elbow pain. In an active patient with a complete rupture, surgery often offers a better chance of restoring strength, especially forearm supination. Non-operative treatment remains a reasonable option in selected cases. The key is to identify the type of injury promptly and match treatment to the patient’s actual functional needs.

References

1. Looney AM, Day J, Bodendorfer BM, et al. Operative vs. nonoperative treatment of distal biceps ruptures: a systematic review and meta-analysis. J Shoulder Elbow Surg. 2022;31(4):e169–e189. DOI: 10.1016/j.jse.2021.12.001.
2. Deschrijver M, Hautekiet A, Steyaert A, De Muynck M, Luypaert E. Distal biceps tendon ruptures: more efficient diagnostics for a better outcome. Acta Orthop Belg. 2022;88(1):160–167. DOI: 10.52628/88.1.20.
3. Cuzzolin M, Secco D, Guerra E, et al. Operative Versus Nonoperative Management for Distal Biceps Brachii Tendon Lesions: A Systematic Review and Meta-analysis. Orthop J Sports Med. 2021;9(10):23259671211037311. DOI: 10.1177/23259671211037311.
4. Boufadel P, Daher M, Lopez R, et al. Return to Sport After Distal Biceps Tendon Repair: A Systematic Review. Am J Sports Med. 2025;53(7):1769–1778. DOI: 10.1177/03635465241295618.

← Injuries and fractures: patient guide

Content prepared by: Tomasz Poboży - orthopaedic surgeon.

Most isolated, nondisplaced or only mildly displaced radial head fractures can be treated without surgery. Management usually involves brief support for comfort followed by controlled restoration of motion as early as the injury safely allows. Fragment displacement of more than 2 mm is not, by itself, an automatic indication for an operation. Mechanical blockage of forearm rotation, comminution, elbow instability and associated injuries are more important.

Polish version: Złamanie głowy kości promieniowej — kiedy potrzebna jest operacja?

How does a radial head fracture occur?

The usual mechanism is a fall onto an outstretched hand. Force travels through the wrist and radius to the elbow, where the radial head impacts the distal humerus. The injury may be a small fracture line, a displaced fragment, or — in more severe trauma — a comminuted radial head fracture.

The radial head is not simply a piece of bone that needs to unite. It contributes to elbow stability. In complex injuries, treatment therefore depends not only on the fracture itself but also on the ligaments, the other bony structures around the elbow and the stability of the joint as a whole.

Typical symptoms

• pain on the lateral side of the elbow, particularly after a fall onto the hand,
• swelling and tenderness over the radial head,
• pain or restriction when turning the palm up or down,
• difficulty fully bending or straightening the elbow,
• pain with tasks such as turning a key, a door handle or opening a bottle.

Similar post-traumatic pain can also come from ligaments, cartilage or other elbow structures, so the diagnosis should not be based on pain location alone.

How is the fracture diagnosed?

Assessment should include the whole upper limb rather than only the most painful point. Elbow motion — especially pronation and supination — joint stability, circulation and sensation are checked. The forearm and wrist also deserve examination because some radial head fractures are accompanied by injuries farther from the elbow.

Plain radiographs are the basic imaging test. CT can be helpful in more complex or comminuted fractures when the number and position of fragments need to be defined more precisely or when surgery is being planned. Ultrasound does not replace radiographs for diagnosing an acute adult fracture, although it can complement soft-tissue or effusion assessment in selected situations.

What does the Mason classification mean?

In simplified terms, Mason type I describes a fracture without substantial displacement, type II a displaced fragment involving part of the radial head, and type III a comminuted fracture. In the Johnston modification, type IV refers to a radial head fracture associated with elbow dislocation.

The classification is useful for describing the injury, but it does not choose the treatment by itself. Two fractures within the same category may differ in stability, available motion and associated damage.

When can treatment be non-operative?

Non-operative management is appropriate mainly for nondisplaced and minimally displaced fractures when the elbow is stable and there is no mechanical block to motion. This is typical for Mason type I fractures and also applies to many carefully selected isolated Mason type II injuries.

A key goal is to avoid unnecessary elbow stiffness. If fracture and joint stability permit, controlled range-of-motion exercises are introduced after a short period of protection. The exact timing and progression of loading depend on the injury pattern rather than a single fixed timetable for every patient.

A randomized trial of 45 adults with isolated Mason type II fractures found no significant one-year functional advantage of screw fixation over non-operative treatment. A 2026 meta-analysis involving 181 patients likewise found no clear operative advantage in function or range of motion. The evidence remains limited, however: the meta-analysis included only four studies, just one of which was randomized, and some analyses were heterogeneous.

Does displacement of more than 2 mm mean surgery?

No. A review in EFORT Open Reviews emphasizes that displacement beyond 2 mm, in the absence of a mechanical block to pronation or supination, is not by itself an unequivocal indication for surgery.

What matters is the overall pattern: fragment size and position, remaining bony contact, comminution, unrestricted motion, joint stability and associated injuries. Treatment should therefore not be decided from a millimetre measurement in a radiology report alone.

When is surgery more likely to be needed?

• A true mechanical block to forearm rotation — a bony fragment prevents pronation or supination rather than motion being limited only by pain.
• Marked comminution of the radial head, particularly when reliable reconstruction is difficult or impossible.
• Loss of elbow stability or an associated dislocation, ligament injury or additional fracture.
• Major displacement with loss of fragment contact, especially when other features of a complex injury are present.
• A situation in which acceptable elbow anatomy and function cannot be restored with non-operative treatment.

In a complex injury, preserving or reconstructing the radial head may be important for joint stability. Simply removing an inconvenient fragment is therefore not a universal solution.

What does surgery involve?

If the fracture can be anatomically reconstructed, open reduction and internal fixation is commonly performed with screws and, in some patterns, a plate. If a severely comminuted fracture cannot be reconstructed reliably and the radial head is needed for elbow stability, radial head replacement may be considered.

The choice of procedure depends on the entire injury pattern. There is no single operation that is appropriate for every radial head fracture.

Return to function

Loss of motion is one of the main problems after elbow injury. When the fracture and the joint are stable, the aim is therefore to begin controlled movement as early as safely possible. Heavier loading, lifting and return to sport require adequate healing progress and restoration of function.

Recovery speed depends on the fracture pattern, associated injuries, treatment method and individual response. The absence of pain at rest does not by itself mean that the bone is fully healed or ready for high loads.

When is urgent assessment needed?

• the elbow is visibly deformed or dislocation is suspected,
• there is an open wound or exposed bone,
• the hand becomes pale, blue or clearly colder than the other hand,
• numbness, finger weakness or other neurological symptoms are increasing,
• pain and swelling are rapidly worsening despite protection and analgesia,
• forearm rotation is essentially impossible or there is a clear mechanical block,
• the forearm or wrist also hurts, suggesting that more than one structure may be injured.

Key point for an orthopaedic surgeon

A radial head fracture does not automatically require surgery. Stable, isolated fractures without a mechanical block often do well with non-operative treatment and early controlled motion. Mechanical blockage, comminution, instability and associated injuries are usually more important than a single displacement measurement. The whole elbow and upper limb therefore need to be assessed, not just one fragment on an image.

References

1. van der Windt AE, Langenberg LC, Colaris JW, Eygendaal D. Which radial head fractures are best treated surgically? EFORT Open Reviews. 2024;9(5):413–421. DOI: 10.1530/EOR-24-0035.
2. Goy C, van de Wall BJM, Beeres FJP, et al. Operative vs. nonoperative treatment in Mason type II fractures: a meta-analysis. JSES Reviews, Reports, and Techniques. 2026;6(3):100773. DOI: 10.1016/j.xrrt.2026.100773.
3. Mulders MAM, Schep NWL, de Muinck Keizer RJO, et al. Operative vs. nonoperative treatment for Mason type 2 radial head fractures: a randomized controlled trial. Journal of Shoulder and Elbow Surgery. 2021;30(7):1670–1678. DOI: 10.1016/j.jse.2021.02.025.

← Elbow conditions

Content prepared by: Tomasz Poboży - orthopaedic surgeon.