Hoffa syndrome (infrapatellar fat pad impingement syndrome)

3 Interesting Facts of Hoffa syndrome

  1. Traumatic (acute or repetitive) hypertrophy of the richly innervated infrapatellar fat pad
  2. Differentiated by:
    • Pain is mainly subpatellar
    • Hoffa sign: if pain is elicited when clinician puts pressure on patellar tendon margins as patient extends bent knee, Hoffa syndrome is suggested
  3. Plain radiographs usually show normal findings; MRI may be useful for diagnosis

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