S62.114P Nondisplaced fracture of triquetrum [cuneiform] bone, right wrist, subsequent encounter for fracture with malunion

Name of the Condition

• Nondisplaced fracture of triquetrum [cuneiform] bone, right wrist, subsequent encounter for fracture with malunion

Summary

This condition involves a break in the triquetrum bone of the right wrist without displacement of bone fragments, with malunion occurring during a subsequent encounter. The triquetrum is a small carpal bone on the ulnar (pinky) side of the wrist, contributing to wrist stability and movement. Malunion refers to the healing of the fracture in an abnormal position, which may affect wrist function. This type of fracture typically results from trauma and is managed after the initial healing phase, with malunion identified during follow-up care.

Causes

Usually caused by direct trauma to the wrist, such as a fall onto an outstretched hand, a blow to the wrist, or a twisting injury. High-impact activities or accidents may also lead to fractures in this specific bone. Malunion can occur if the fracture heals improperly, often due to inadequate immobilization, poor blood supply, or excessive movement during the healing process.

Risk Factors

• Participation in contact sports or activities with a high risk of falls.
• Osteoporosis or weakened bone structure, especially in older adults.
• Previous wrist injuries or fractures.
• Inadequate immobilization or premature weight-bearing during initial healing.

Symptoms

• Persistent pain, swelling, and tenderness in the ulnar side of the right wrist.
• Bruising or discoloration around the injury site.
• Limited range of motion or difficulty moving the hand or fingers.
• Visible deformity or altered wrist alignment in severe cases.
• Reduced grip strength or functional impairment.

Diagnosis

Physical examination to assess pain, swelling, and wrist mobility, focusing on malunion signs like abnormal bone alignment. Imaging tests, such as X-rays, CT scans, or MRIs, to confirm the fracture and evaluate malunion extent, including bone position and joint congruency.

Treatment Options

• Immobilization with a cast or splint to support healing and prevent further displacement.
• Physical therapy to restore range of motion, strength, and function.
• Pain management with medications or modalities like ice/heat.
• Surgical intervention (e.g., osteotomy or bone grafting) for severe malunion affecting function.
• Activity modification to avoid stress on the healing wrist.

Prognosis and Follow-Up

Prognosis depends on malunion severity and treatment adherence. Most patients recover with conservative care, but functional limitations may persist. Regular follow-up appointments monitor healing, alignment, and rehabilitation progress. Long-term outcomes may include mild wrist stiffness or reduced mobility if malunion is significant.

Complications

• Chronic pain or discomfort.
• Reduced wrist mobility or strength.
• Increased risk of arthritis due to abnormal joint mechanics.
• Nerve or tendon irritation from malaligned bone.
• Need for additional interventions if malunion worsens.

Lifestyle & Prevention

• Use protective gear during high-risk activities (e.g., wrist guards in sports).
• Maintain bone health with calcium and vitamin D, especially in older adults.
• Avoid repetitive wrist stress or trauma.
• Follow post-injury immobilization and rehabilitation guidelines strictly.

When to Seek Professional Help

• Worsening pain, swelling, or deformity.
• Inability to move the wrist or fingers.
• Signs of infection (e.g., redness, warmth, fever).
• Persistent functional impairment after treatment.

Tips for Medical Coders

Document the subsequent encounter context, including prior treatment and malunion confirmation. Specify the right wrist and triquetrum bone involvement. Ensure clinical notes detail malunion assessment (e.g., imaging findings, functional impact) to support code assignment.