Lateral Epicondylalgia

History: gradual onset of pain over the lateral elbow, often radiating into the forearm extensor mass. Worse with gripping, lifting, pouring, turning door handles, shaking hands, and carrying objects with the arm extended (kettle, briefcase). Often dominant arm; bilateral in approximately 20%.

Examination:

• •Tenderness over the lateral epicondyle and immediately distal at the ECRB origin
• •Cozen test: pain on resisted wrist extension with elbow extended - the most commonly used test
• •Maudsley test: pain on resisted middle finger extension - more specific for ECRB

• •Mill test: pain on passive wrist flexion with elbow extended (stretches the common extensor origin)
• •Grip strength reduced on the affected side; a significant discrepancy is a strong clinical indicator. Test in both elbow extension and flexion
• •Full elbow ROM should be preserved; significant restriction should redirect you to an alternative diagnosis
• •Radial nerve ULNT2b: consider when symptoms are not responding to loading alone (positive test suggests neural mechanosensitivity)
• •Always examine the cervical spine (C5/C6 radiculopathy can mimic or coexist)

Differentials: PIN entrapment / radial tunnel syndrome (the most important differential for refractory cases - tenderness 3-4 cm DISTAL to the lateral epicondyle over the supinator at the arcade of Frohse, pain on resisted supination, NO sensory loss because PIN is motor only - the two can coexist); cervical radiculopathy (C5/C6); elbow OA; radial head fracture; medial epicondylalgia (opposite pattern).

Clinical diagnosis. Imaging is reserved for diagnostic uncertainty (BESS 2023).

• •Plain radiographs: not indicated for typical presentations. Reserve for trauma, locking, or restricted ROM
• •Ultrasound or MRI: only when the diagnosis is uncertain or coexisting pathology is suspected. Imaging findings correlate poorly with symptoms
• •Nerve conduction studies: if PIN entrapment is suspected
• •Bloods: not routinely indicated. Consider inflammatory markers if inflammatory arthritis is suspected
• •Outcome measures: Patient-Rated Tennis Elbow Evaluation (PRTEE) or DASH; grip strength dynamometry for monitoring response

Usually self-limiting. Management supports natural recovery through education and active rehabilitation.

First-line (community) - per NICE CKS and BESS 2023:

• •Education: explain the self-limiting nature, expected recovery (6-24 months, most by 1 year), and the central role of active management. A wait-and-see approach with education is superior to corticosteroid injection at 1 year
• •Activity modification: reduce aggravating activities, modify technique and equipment. Avoid complete rest
• •Analgesia: topical NSAID for short-term relief; oral NSAID short-term if needed. Paracetamol alone is of limited benefit
• •Physiotherapy: supervised exercise-based rehabilitation is the mainstay (BESS 2023 strong recommendation). Symptoms beyond 12 months may still respond if structured rehabilitation has not previously been tried
• •Orthoses: a counterforce brace may be offered for symptomatic relief; counsel that benefit is uncertain (BESS 2023)

Not recommended:

• •Corticosteroid injection: do not offer (NICE CKS; BESS 2023 strong recommendation against). Coombes 2013 and Bisset 2006: short-term relief but WORSE outcomes at 6 and 12 months and higher recurrence
• •Extracorporeal shock wave therapy (ESWT): strong recommendation against (BESS 2023)
• •Autologous blood injection: should not be used (BESS 2023)
• •PRP: no clear benefit over placebo
• •Dry needling: no evidence of benefit

Referral: refer if symptoms persist beyond 6-12 months despite optimised conservative management; earlier if the diagnosis is uncertain or there is significant occupational impact.

Surgical options (awareness): debridement of degenerative ECRB tissue (Nirschl procedure). Required in under 5% of cases; no proven benefit over placebo (BESS 2023).

Phase 1 (pain-dominant / reactive): isometric wrist extension exercises performed pain-free. Activity modification and relative rest. Counterforce brace may be tried.

Phase 2 (loading / dysrepair-degenerative): progressive isotonic wrist extension and forearm rotation. Eccentric loading and heavy slow resistance (the Tyler Twist with a FlexBar is widely used). If neural mechanosensitivity is identified (positive ULNT2b), add neurodynamic exercises.

Phase 3 (functional): graduated return to aggravating activities. Kinetic chain assessment addressing proximal weakness in racquet players and occupational populations.

Most patients improve over 6-12 weeks of structured rehabilitation. Full resolution may take 6-24 months. Symptoms beyond 12 months may still respond if structured rehabilitation has not previously been tried (BESS 2023).

Counsel that some initial increase in symptoms with loading is expected and not a sign that the tendon is being damaged.

• •NICE CKS Tennis elbow - The primary care framework. Wait-and-see with education is superior to corticosteroid injection at 1 year; do not offer corticosteroid injection.
• •BESS 2023 patient care pathway - Strong recommendations: offer structured physiotherapy and education; do NOT offer corticosteroid injection, extracorporeal shock wave therapy, or autologous blood injection; surgery has no proven benefit over placebo.
• •Coombes et al 2013 (JAMA) - Landmark RCT: corticosteroid injection gives short-term relief but worse outcomes at 6 and 12 months and higher recurrence than wait-and-see or physiotherapy.
• •Bisset et al 2006 (BMJ) - Earlier RCT establishing the same long-term-harm signal from injection; underpins the current UK position.
• •Cook and Purdam continuum (2009) - The pathology framework: reactive, dysrepair, degenerative. Drives the staged loading approach to rehabilitation.

• •Clinical diagnosis. Do NOT image a classic tennis elbow presentation - imaging findings correlate poorly with symptoms.
• •Corticosteroid injection is actively discouraged. Coombes 2013 (JAMA): short-term relief but worse outcomes at 6 and 12 months. The single highest-yield management fact.
• •ESWT, autologous blood, and PRP are NOT recommended. Surgery has no proven benefit over placebo (BESS 2023). Common SBA distractors.
• •PIN entrapment is the most important differential for refractory lateral elbow pain: tenderness 3-4 cm distal to the lateral epicondyle, pain on resisted supination, NO sensory loss because PIN is motor only.
• •Cozen test (resisted wrist extension), Maudsley test (resisted middle finger extension), Mill test (passive stretch). Maudsley test can be positive in both tennis elbow and radial tunnel syndrome - dominant tenderness location distinguishes them.
• •Self-limiting in most cases over 6-24 months. Always examine the cervical spine.