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Piriformis Syndrome

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  1. See Also
    1. Sciatica
  2. Definition
    1. Sciatic nerve impingement by the piriformis muscle
  3. Causes
    1. Anatomic variant (sciatic nerve passes through piriformis muscle in 15% of patients)
    2. Decreased core muscle strength (buttocks)
    3. Sacroiliac joint dysfunction
    4. Local trauma to piriformis muscle
    5. Pressure from wallet in pocket
  4. Signs
    1. Pain on Internal rotation of hip against resistance
  5. Management
    1. Local measures (e.g. ice or heat)
    2. NSAIDs
    3. Core muscle strengthening Exercises
    4. Correct comorbid conditions (e.g. Sacroiliac joint dysfunction)
    5. Local Corticosteroid Injection

Piriformis syndrome (C0458224)

Definition (AOT)Spasm of the piriformis muscle causing sciatic pain.
ConceptsDisease or Syndrome (T047)
EnglishPelvic outlet syndrome, Piriformis syndrome, Sciatica due to compression of sciatic nerve at pelvic outlet
Spanishciatica por compresion del nervio ciatico en el estrecho inferior de la pelvis, sindrome del estrecho inferior de la pelvis, sindrome piriforme
Parent ConceptsSomatic dysfunction (C0264202), Sciatica (C0036396)
SourcesAOT, SCTSPA, SNOMEDCT
Derived from the NIH UMLS (Unified Medical Language System)



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