Differentiating Buttock Pain and Sacroiliac Joint Disorders

Where is the problem?[edit | edit source]

Gluteal or Buttock pain can be triggered by many causes such as[1]:

  • Radicular pain from Lumbar spine origin
  • Sciatic nerve entrapment
  • Obturator internus/gemellus syndrome
  • Piriformis Syndrome
  • Quadratus femoris/ischiofemoral pathology
  • Problems at the hamstrings
  • Gluteal muscles disorders

The complicated anatomy of the SIJ, the Lumbar spine and the buttock area makes the differential diagnosis of pain and dysfunction a challenge. MRI findings are not consistent with LBP history and symptoms[2].

Considerations[edit | edit source]

The presence of chronic pain is not always caused by biopsychosocial causes. Missing the primary structural sources of the pain can lead to catastrophisation and development of fear avoidance and anxiety. Factors such as sleep, hormonal balance, smoking, the presence of comorbidities and activity level have an influence on their perception of the pain and the development of chronicity. The mangement shouldn't focus only on the biospychosocial aspects without ignoring the structural causes.

Impingement of the sciatic nerve occurs mostly in the deep gluteal space and around the piriformis muscle than in the lumbar spine level.

Anatomy[edit | edit source]

Piriformis, gemmeli, obturator, quadratus femoris.PNG

The Sacroiliac joint is the joint connection between the spine and the pelvis formed by the fusion of the three bones of the pelvis: the ilium, ischium, and pubic bone[3]. The sacroiliac joint has different functions such as load transfer between the spine and the lower extremities and shock absorbion for the spine above and converts torque from the lower extremities into the rest of the body[4].

The subgluteal space is located between the middle and deep gluteal aponeurosis layers. It contains Superior/Inferior gluteal nerves, blood vessels, Ischium, Sacrotuberous/sacrospinous ligaments, Sciatic nerve and Piriformis. The piriformis muscle is innervated by the branches of the L5, S1, and S2 spinal nerves. The sciatic nerve has a complicated relationship with the piriformis muscle, passing above, below and through the mucsle before and after dividing[1].

Refernces[edit | edit source]

  1. 1.0 1.1 Carro LP, Hernando MF, Cerezal L, Navarro IS, Fernandez AA, Castillo AO. Deep gluteal space problems: piriformis syndrome, ischiofemoral impingement and sciatic nerve release. Muscles, ligaments and tendons journal. 2016 Jul;6(3):384.
  2. Tonosu J, Oka H, Higashikawa A, Okazaki H, Tanaka S, Matsudaira K. The associations between magnetic resonance imaging findings and low back pain: A 10-year longitudinal analysis. PLoS One. 2017 Nov 15;12(11):e0188057.
  3. Dutton M. Orthopaedic Examination, Evaluation, and Intervention. 2nd ed. New York: McGraw Hill, 2008.
  4. Sacroiliac Joint. Physiopedia Page (last accessed 20/09/2020) Available from: https://physio-pedia.com/Sacroiliac_Joint#cite_note-Dutton-2