The suspected scaphoid fracture and isotope bone imaging

Area of Science:

• Orthopedic Surgery
• Radiology
• Sports Medicine

Background:

• Carpal trauma frequently leads to scaphoid injuries.
• A subset of patients present with clinical signs of scaphoid fracture, yet initial radiographs do not reveal bone damage.
• Persistent pain necessitates advanced diagnostic imaging like isotope bone scanning.

Purpose of the Study:

• To evaluate the utility of isotope bone scanning in diagnosing occult carpal fractures.
• To identify the incidence of scaphoid fractures versus other carpal bone injuries in patients with suspected scaphoid trauma and negative initial radiographs.
• To assess the detectability of these fractures on initial radiographic review with hindsight.

Main Methods:

• Retrospective review of 36 consecutive isotope bone scans performed for suspected scaphoid injury.
• Analysis of initial radiographs for fracture detection.
• Correlation of bone scan findings with radiographic evidence and clinical presentation.

Main Results:

• Eighteen fractures were diagnosed in total.
• Three scaphoid fractures, six distal radius fractures, and nine other carpal bone fractures were identified.
• Eight of the diagnosed fractures were retrospectively visible on the original radiographs.
• Isotope bone scanning identified fractures not evident on initial radiography.

Conclusions:

• In cases of persistent radial wrist pain after trauma, a broader differential diagnosis including distal radius and other carpal bone fractures is crucial.
• Isotope bone scanning is valuable for detecting occult fractures when initial radiographs are inconclusive.
• Radiographic review, even with hindsight, may miss subtle carpal fractures, underscoring the role of advanced imaging.