Triceps Rupture
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Direct answer
Rupture of the distal triceps tendon is the rarest of the major tendon ruptures, roughly 1-2 percent of all tendon injuries, classically produced by an eccentric load against a contracting triceps — a fall onto the outstretched hand or the lift of a heavy weight. Unlike the degenerate Achilles or supraspinatus, a substantial share occurs in younger patients with systemic risk factors: chronic renal failure with secondary hyperparathyroidism, corticosteroid and anabolic steroid use, fluoroquinolone therapy, Marfan syndrome and olecranon bursitis. The patient cannot extend the elbow against gravity, a palpable gap sits just proximal to the olecranon, and a modified Thompson squeeze test (compressing the triceps belly fails to extend the elbow) supports the diagnosis, with MRI confirming retraction and distinguishing partial from complete tears. Complete ruptures are repaired early through transosseous cruciate or locking sutures; partial tears may be managed non-operatively.
What you must remember
- Epidemiology: male predominance, average age around 40-50 years in degenerate tears, younger in weightlifters and steroid users; bilateral ruptures should prompt a search for renal bone disease or steroid exposure.
- Mechanism: eccentric contraction against a sudden flexion force — fall on outstretched hand, pressing a heavy weight, or a direct blow.
- Systemic associations: chronic renal failure with secondary hyperparathyroidism, oral and injectable corticosteroids, anabolic steroids, fluoroquinolones, diabetes, Marfan and Ehlers-Danlos syndromes, local steroid injection for olecranon bursitis.
- Examination: inability to extend against gravity or resistance, palpable suprapole defect, preserved extension in partial tears (lateral and medial heads variably involved), and an equivocal extensor mechanism may still allow weak extension through anconeus.
- Imaging: radiograph may show a fleck avulsion from the olecranon ("flake sign"); ultrasound and MRI define the tear site, retraction and partial versus complete status.
- Repair technique: Krackow or locking sutures in the tendon passed through cruciate drill holes in the olecranon, or suture anchors; chronic retracted tears need V-Y triceps advancement, occasionally augmented with anconeus or Achilles allograft.
- Rehabilitation: brief splinting, then gravity-eliminated active motion by two weeks, resistance after three months, return to heavy sport at 6-9 months.
A typical exam case
A 34-year-old bodybuilder feels a pop while doing a heavy bench press and arrives holding a swollen, slightly flexed elbow. Extension against gravity is impossible, elbow flexion is intact, and a tender gap is palpable above the olecranon; the radiograph shows a small bony fleck at the olecranon tip. The reasoning runs: this is an extensor mechanism failure at the tendon-bone junction; ask explicitly about anabolic steroid cycles, renal disease and fluoroquinolone use; grade the tear with an MRI if the examination is equivocal. A complete rupture in an active patient goes to early repair — delayed repair means retraction, adhesion to the humerus and the need for V-Y lengthening. After repair, the elbow is splinted in about 45-60 degrees of flexion for two weeks, then protected active motion begins; the triceps is treated with respect because it is one tendon where aggressive early loading has historically produced gaps.
Viva angles and Indian realities
Examiners love one contrast: the tendon avulses from the olecranon in the young and strong, whereas the same force in the elderly osteoporotic bone produces an olecranon fracture instead of a tendon failure — the failure occurs at the weakest link. A second contrast is the "pseudo" cases: an intact triceps with a C7 radiculopathy can mimic weak extension, and a displaced olecranon fracture mimics the palpable gap; neurology and radiograph settle both. In Indian practice, anabolic steroid use in gym-going young men is an under-reported background cause worth asking about in the history, and late presentations after faith in local massage and native splinting are common enough that a viva answer should volunteer the chronic-repair plan (V-Y advancement) unprompted. Partial tears in low-demand patients are treated non-operatively with a hinged protocol — say this and you sound like a surgeon, not a textbook.
Frequently asked questions
What is the classical mechanism of distal triceps rupture?
An eccentric contraction of the triceps against a sudden flexion force, such as a fall on the outstretched hand or a failed heavy press, avulsing the tendon from the olecranon.
Which systemic condition is specifically linked to triceps rupture?
Chronic renal failure with secondary hyperparathyroidism; steroid therapy, anabolic steroid use and fluoroquinolones are the other recognised associations.
How do you test for a complete triceps rupture clinically?
Inability to extend the elbow against gravity with a palpable gap proximal to the olecranon; compressing the triceps belly fails to produce extension (a modified Thompson test).
What radiographic sign suggests triceps avulsion?
A small bony fleck or "flake sign" avulsed from the tip of the olecranon, seen just proximal to the olecranon on the lateral view.
How are chronic retracted triceps ruptures reconstructed?
Tendon mobilisation with V-Y advancement to the olecranon through cruciate drill holes or suture anchors, occasionally augmented with anconeus flap or allograft when tissue quality is poor.