What is the recommended management for a pisiform subluxation?

Management of Pisiform Subluxation

Pisiform subluxation does not require specific therapeutic intervention in most cases, as it does not significantly affect clinical outcomes or functional recovery. 1

Clinical Context and Significance

Pisiform subluxation is an incidental finding that occurs in approximately 23% of patients with distal radius fractures 1. Despite this relatively high prevalence, the condition itself does not warrant targeted treatment during management of associated wrist injuries.

Key Evidence

A retrospective study of 134 surgically treated distal radius fracture patients specifically investigated whether pisiform subluxation affected postoperative outcomes 1. The findings were definitive:

• No significant differences were found between subluxation and non-subluxation groups in:
  • Range of motion (except pronation angle, which was minimally affected)
  • Grip strength
  • Pain scores (VAS)
  • Functional outcomes (Q-DASH scores)
  • Overall wrist function (Mayo score)

The only statistically significant difference was a slightly reduced pronation angle in the subluxation group, but this did not translate to clinically meaningful functional impairment 1.

Management Algorithm

For Pisiform Subluxation Associated with Other Wrist Injuries:

1. Treat the primary injury (e.g., distal radius fracture) according to standard protocols
2. Do not perform additional interventions specifically targeting the pisiform subluxation
3. No special immobilization or reduction maneuvers are required for the subluxation itself

For Isolated Pisiform Subluxation (Asymptomatic):

• Observation only - no treatment necessary

Important Distinction: Subluxation vs. Dislocation

It is critical to differentiate pisiform subluxation from pisiform dislocation, as these are distinct entities requiring different management:

Acute Isolated Pisiform Dislocation:

When complete dislocation occurs (not subluxation), treatment options include 2, 3:

• Closed reduction with immobilization (first-line for reducible dislocations)
• Open reduction if closed reduction fails
• Guyon's canal decompression if ulnar nerve symptoms are present
• Pisiformectomy for chronic cases or failed conservative management

Chronic Pisotriquetral Instability with Fracture:

In rare cases of chronic dislocation with associated triquetral fracture, pisotriquetral arthrodesis may be considered as an alternative to pisiformectomy, particularly in young, active patients 4.

Clinical Pitfalls to Avoid

1. Do not confuse subluxation with dislocation - subluxation is a partial displacement that does not require reduction; dislocation is complete displacement requiring intervention
2. Do not perform unnecessary imaging or interventions for incidental pisiform subluxation found on CT during evaluation of other wrist injuries
3. Do not delay treatment of the primary wrist injury to address asymptomatic pisiform subluxation
4. Focus on associated injuries - when patients have persistent pain or dysfunction after wrist trauma, this is typically due to associated fractures (distal radius, triquetrum, distal ulna) rather than the pisiform subluxation itself 5

Bottom Line

Therapeutic intervention for pisiform subluxation is unnecessary 1. Direct your treatment efforts toward any associated injuries, as these—not the subluxation—determine functional outcomes and long-term prognosis.