12/05/2026
𝐃𝐞𝐞𝐩 𝐆𝐥𝐮𝐭𝐞𝐚𝐥 𝐒𝐲𝐧𝐝𝐫𝐨𝐦𝐞: 𝐒𝐜𝐢𝐚𝐭𝐢𝐜𝐚 𝐖𝐢𝐭𝐡𝐨𝐮𝐭 𝐭𝐡𝐞 𝐃𝐢𝐬𝐜
When a patient walks in with radiating posterior leg pain, the immediate thought is often a lumbar disc herniation. If the lumbar spine is cleared, the backup diagnosis is usually "Piriformis Syndrome."
However, modern literature emphasizes that Deep Gluteal Syndrome (DGS) is a much more accurate, yet underestimated, cause of posterior hip pain and non-discogenic sciatica.
👉 What Is Deep Gluteal Syndrome?
DGS is defined as the presence of pain in the buttock caused by non-discogenic entrapment of the static or dynamic sciatic nerve in the subgluteal space.
Rather than just one muscle causing the problem, it recognizes that the piriformis muscle is just one of several potential culprits that can trap the sciatic nerve.
👉 Pathophysiology
The sciatic nerve needs to glide freely during hip movement. Entrapment prevents this glide. Common compression sites in the subgluteal space include:
1️⃣ The Piriformis Muscle (The classic variant)
2️⃣ The Gemelli-Obturator Internus Complex (Acting like a pair of scissors on the nerve during hip rotation)
3️⃣ Ischiofemoral Impingement (Narrowing of the space between the ischial tuberosity and lesser trochanter)
4️⃣ Fibrous Bands or Vascular Lesions tethering the nerve
👉 Typical Pain Distribution
Patients with DGS generally present with:
• Deep, aching buttock pain
• Posterior thigh pain radiating down the back of the leg
• Pain that is significantly worsened by prolonged sitting (over 20-30 minutes)
• Radicular pain reproduced with hip flexion and internal rotation
👉 Key Clinical Signs
✔️ Seated Piriformis Stretch Test: Reproduces buttock/leg pain
✔️ Pace Sign: Pain and weakness during resisted hip abduction and external rotation
✔️ Active Piriformis Test: Patient lies on the unaffected side, testing active abduction/external rotation against resistance
👉 Why It Is Frequently Misdiagnosed
Because radicular pain is the primary complaint, clinicians and patients often overly focus on the spine. It mimics:
• Lumbar radiculopathy (discogenic sciatica)
• High hamstring tendinopathy (Hamstring syndrome)
• Sacroiliac joint (SIJ) dysfunction
👉 Evidence-Based Treatment Approaches
Stretching the piriformis isn't always the answer—aggressive stretching can sometimes compress the nerve further.
✅ Conservative management
• Sciatic nerve flossing and tensioning (neurodynamics)
• Strengthening the deep external rotators and gluteus maximus
• Modifying sitting mechanics (using cushions to unload the ischial tuberosity)
• Soft tissue mobilization of the deep hip rotators
✅ Interventional options
• Image-guided local anesthetic and corticosteroid injections
• Botox injections into the specific offending muscle
• Endoscopic sciatic nerve decompression
📌 Clinical Takeaway
Not all sciatica comes from the spine. During the evaluation of radiating leg pain, discogenic etiology must be excluded, but clinicians must look beyond just the piriformis to alternate diagnoses in the posterior pelvis. Shifting your diagnosis to the broader "Deep Gluteal Syndrome" leads to better outcomes.
✅ References (Recent Literature)
• Geler Külcü, 2024 – Deep Gluteal syndrome: An underestimated cause of posterior hip pain
• Kanumuri et al., 2024 – Piriformis Syndrome and Deep Gluteal Syndrome: Presentation, Diagnostic Imaging, and Management
• Sharma et al., 2023 – Looking beyond Piriformis Syndrome: Is It Really the Piriformis?
