Clay-Shoveler's Fractures

• Mechanism: Sudden flexion against resisting extensors (historically: shoveling clay)
• Modern: MVA, sports, falls
• Levels: C7 most common, C6 and T1 also common
• Age: All ages, no specific predilection

• Stability: Stable injury (posterior bony element only)
• Function: Usually recovers fully with conservative treatment
• Associated injuries: Must rule out other cervical injuries (burst, facet)
• Surgery: NOT indicated for isolated fractures

• Canadian C-spine Rule (Stiell, NEJM 2003) - high-sensitivity rule deciding which alert, stable patients need cervical imaging
• NEXUS low-risk criteria - widely used in North America; slightly lower sensitivity than the Canadian rule in head-to-head data
• NICE NG41 (UK, head/spinal injury) - CT cervical spine for adults meeting trauma criteria; MRI if neurology or ligamentous concern
• EAST / trauma society guidance - CT is the standard modality for cervical clearance after significant mechanism; plain films alone are inadequate

• AO Spine subaxial classification - facet (F), and morphology grades; an isolated spinous process injury is a minor/stable pattern
• SLIC (Vaccaro/Whang) - low score for isolated posterior-element injury supports non-operative care
• No society recommends surgery for an isolated clay-shoveler's fracture
• Consensus across societies: rigid/soft collar for comfort, analgesia, activity modification 4-6 weeks, graded return

• CT is first-line for trauma clearance; multi-level and associated injuries reliably excluded
• MRI readily available for the soft-tissue avulsion variant (children, normal X-rays) and discoligamentous assessment
• Decision rules (Canadian C-spine / NEXUS) reduce unnecessary imaging

• Plain radiography +/- swimmer's view may be the only modality - awareness of the ghost sign is essential
• Plain films under-call associated/multi-level injuries; a low threshold to transfer for CT after high-energy trauma
• Management itself (collar, analgesia, activity modification) is low-cost and universally deliverable; the constraint is diagnosis, not treatment

There is no evidence a collar improves union or outcome. Because the injury is stable, immobilisation is purely for symptom control, and many authors favour early mobilisation as tolerated rather than rigid bracing. Practice varies from no collar to 4-6 weeks.

Fibrous non-union is frequently described and is usually asymptomatic, but the often-quoted "over 50 percent" figure derives from small case series, not robust cohorts. Rare symptomatic non-union (as in the 10-year golf follow-up) is reported.

In children/adolescents a clay-shoveler's-type injury can occur with normal radiographs and only MRI-evident avulsion. Whether this is a distinct entity (Schmitt disease) or the same process is debated, but the practical message is to image with MRI when X-rays are normal but suspicion is high.

Excision of a symptomatic non-united fragment is described only in isolated reports. There is no comparative evidence; it is a last resort after failed prolonged conservative care, not a routine option.