Approach to Isolated Trapezoid Fractures

Area of Science:

• Orthopedic Surgery
• Radiology
• Sports Medicine

Background:

• The trapezoid bone is the least common carpal bone fracture site, accounting for 4% of all carpal fractures.
• Isolated trapezoid fractures are infrequently reported, with typical injury mechanisms involving axial loads transmitted from the second metacarpal.

Observation:

• Two cases of isolated trapezoid fractures are presented, initially presenting with nonspecific wrist pain and negative plain X-rays.
• Both patients experienced direct trauma and axial force through the scaphoid region of an extended wrist.
• Advanced imaging, including CT and MRI, was crucial for diagnosis.

Findings:

• Conservative management, including splinting and immobilization, led to full recovery in both patients within 2.5 to 3 months.
• Isolated trapezoid fractures often present with vague symptoms that can mimic scaphoid fractures.
• Athletic activities involving dorsal wrist pain, swelling, and snuffbox tenderness with negative X-rays warrant high suspicion for occult trapezoid fractures.

Implications:

• Early and accurate diagnosis of trapezoid fractures is essential, requiring a high index of suspicion, especially in athletes.
• Treatment strategies vary based on fracture displacement and associated injuries, ranging from conservative measures to surgical intervention.
• This highlights the importance of advanced imaging in cases of persistent wrist pain despite negative initial radiographic findings.