20/05/2026
𝗦𝘂𝗽𝗲𝗿𝗶𝗼𝗿 𝗖𝗹𝘂𝗻𝗲𝗮𝗹 𝗡𝗲𝗿𝘃𝗲 𝗘𝗻𝘁𝗿𝗮𝗽𝗺𝗲𝗻𝘁: 𝗧𝗵𝗲 𝗗𝗲𝗰𝗲𝗽𝘁𝗶𝘃𝗲 𝗟𝗼𝘄 𝗕𝗮𝗰𝗸 𝗣𝗮𝗶𝗻
Low back pain is encountered frequently, and diagnoses like sacroiliac joint dysfunction or lumbar facet syndrome are common. But when pain becomes chronic and refractory to standard care, a hidden nerve entrapment is often to blame: Superior Cluneal Nerve Entrapment (SCN-E).
Recent literature highlights that this entrapment is a significantly under-recognized cause of lower back and gluteal pain, affecting up to 14% of patients with chronic low back pain.
👉 What Is Superior Cluneal Nerve Entrapment?
The superior cluneal nerves are sensory branches that originate from the lower thoracic and lumbar spine. They provide sensation to the skin of the upper buttocks and lower back.
When these delicate nerves get pinched as they travel toward the pelvis, they trigger intense, localized pain.
👉 Pathophysiology
The entrapment almost always happens at a specific anatomical bottleneck: the osteofibrous tunnel.
As the nerve passes over the posterior iliac crest, it must pierce through the rigid thoracolumbar fascia. Altered lumbopelvic biomechanics, fascial tightness, or prior injuries can cause this fascia to compress the nerve against the bone.
👉 Typical Pain Distribution
Patients typically present with:
• Localized, burning pain over the upper buttock and posterior iliac crest
• Pain that radiates down the back of the thigh, mimicking sciatica ("pseudo-sciatica")
• Symptoms that worsen with walking, standing, or twisting the lower back
👉 Key Clinical Signs
Several clinical findings can suggest SCN-E:
✔️ Extreme tenderness exactly over the posterior iliac crest (about 7cm from the midline)
✔️ Positive Pinch-Roll Test: Grabbing and rolling the skin over the iliac crest reproduces sharp pain
✔️ Pain relief immediately following a targeted local anesthetic block at the crest
👉 Why It Is Frequently Misdiagnosed
Because of its location and pain referral pattern, it is almost identical to:
• Sacroiliac Joint (SIJ) dysfunction
• Lumbar facet syndrome
• Lumbar radiculopathy (discogenic sciatica)
👉 Evidence-Based Treatment Approaches
📃 Conservative management
• Myofascial release of the thoracolumbar fascia
• Core and pelvic stabilization exercises
• Postural re-education to reduce tension on the iliac crest
📃 Interventional options
• Ultrasound-guided corticosteroid blocks around the nerve
• Radiofrequency ablation for chronic, stubborn cases
• Surgical release of the fascial tunnel in refractory cases
📌 Clinical Takeaway
When a patient has chronic low back pain that hasn't responded to spine-focused or SIJ treatments, check the fascia over the iliac crest. A simple skin rolling test can reveal SCN entrapment, saving the patient from unnecessary spinal interventions.
✅ References
• Under-recognized Cause of Buttock Pain; Superior Cluneal Neuropathy, 2025 - Scientific Archives
• Superior Cluneal Nerve Entrapment: An Overlooked Cause of Low Back Pain, 2026 - Pain Medicine Case Reports
• The Role of Musculoskeletal Ultrasound in Detecting Superior Cluneal Nerve Entrapment, 2026 - MDPI
