Osgood-Schlatter disease — Rapid

Synopsis

Diagnose tibial-tubercle traction apophysitis clinically, distinguish it from acute avulsion and sinister bone pain and guide load modification that preserves adolescent activity and strength.

Osgood-Schlatter disease is traction apophysitis at the tibial tubercle in a growing adolescent, commonly during running and jumping sports.
Key findings are activity-related focal tubercle pain, tenderness and prominence, worsened by jumping, sprinting, squatting, stairs and kneeling.
The knee joint itself should have no large effusion, instability or loss of passive range; these findings suggest another diagnosis.
Diagnosis is clinical in a typical presentation; radiographs are first-line only for acute trauma, atypical pain, severe swelling or diagnostic uncertainty.
First-line management is relative load reduction below the pain and limp threshold, ice, short analgesia and progressive quadriceps, hamstring and hip rehabilitation.
Complete sport prohibition is rarely required: participation can continue when pain is mild, technique is controlled and there is no limp or next-day deterioration.
A patellar-tendon strap or kneeling pad can reduce symptoms for selected activities but does not replace load and strength management.
Steroid injection and routine surgery are inappropriate in the growing apophysis; consider ossicle excision only for persistent focal symptoms after maturity.

Key red flags

An acute explosive event with loss of straight-leg raise is a tibial-tubercle avulsion until imaging proves otherwise.

Night or rest pain, systemic illness, weight loss, mass or pain away from the tubercle requires tumour or infection investigation.

A hot red knee with fever or effusion is not uncomplicated traction apophysitis and needs urgent infection assessment.

Tense calf swelling, increasing analgesic need, passive-stretch pain or paraesthesia after avulsion suggests compartment syndrome.

Persistent pain after skeletal maturity may reflect a mobile ossicle, prominent tubercle, patellar-tendon disease or an alternative diagnosis.

A limp or pain that continues to worsen despite meaningful load reduction should prompt examination and imaging review.

Investigation priorities

First-line clinical assessmentFirst stepFirst line

Confirm characteristic load-related tubercle pain and exclude joint, extensor, hip and sinister pathology.

Management branches

TypicalConfirm clinically and manage load

Gradual activity-related tubercle pain occurs in a growing child without red flags or acute extensor failure.

Localise tenderness, examine knee and hip fully and quantify recent sport and growth-related load.
Explain the benign self-limiting biology and agree activity limits based on limp and next-day response.
Begin flexibility, quadriceps, hip and calf strength and controlled landing work.
Review if function fails to improve or pain becomes independent of activity.

Key medicines

Ibuprofen for a short painful flareSelect the appropriate oral milligram dose and formulation volume from current BNFC paediatric tables, prescribe only for the brief painful flare, and state the maximum daily frequency.Avoid in dehydration, renal impairment, gastrointestinal bleeding risk or NSAID-sensitive asthma. Do not administer routinely before sport to mask load pain, and prevent concurrent NSAID use.

Paracetamol as an alternativePrescribe the current BNFC dose by age and weight, stating exact milligrams, liquid volume, dosing interval and 24-hour maximum.Check all combination medicines and liver risk; worsening night or rest pain requires investigation rather than ongoing analgesic escalation.

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