Imaging for Mallet Finger

Radiographic Evaluation

The American College of Radiology recommends a standard 3-view radiographic examination for proper evaluation of mallet finger, including posteroanterior (PA), lateral, and oblique views 2
Radiographs are commonly used to assess for bone involvement in extensor tendon injuries and determine the need for operative fixation, with the American College of Radiology providing guidelines for this assessment 1
An internally rotated oblique projection, in addition to the standard externally rotated oblique, increases diagnostic yield for phalangeal fractures, according to the American College of Radiology 2

Radiographs can detect palmar displacement of the distal phalanx or an interfragmentary gap >3 mm, which are indications for surgical intervention, as recommended by the American College of Radiology 1
X-rays can show fractures involving more than one-third of the articular surface, which typically require operative fixation, according to the American College of Radiology 1

MRI without IV contrast is especially useful for evaluating soft tissue injuries when radiographs are negative but clinical suspicion remains high, with the American College of Radiology recommending its use in these cases 1, 3
MRI is ideal for evaluating tendon injuries and helping with surgical planning, with high sensitivity and specificity for detecting tendon tears, as reported by the American College of Radiology 3
For metacarpal and digital fractures, CT is usually not indicated during acute injury, according to the American College of Radiology 1
Ultrasound has limited utility for evaluating bone injuries in the hand and is not typically used for mallet finger diagnosis, as stated by the American College of Radiology 1, 3

If initial radiographs are negative but clinical suspicion remains high, options include placing the patient in a splint and repeating radiographs in 10-14 days, or proceeding to MRI, as suggested by the American College of Radiology 2

Relying on only 2 views is inadequate for detecting fractures in the fingers; a 3-view radiographic examination is necessary, as recommended by the American College of Radiology 2
Failure to obtain adequate radiographic views may lead to missed diagnosis; a minimum of 3 views is necessary, according to the American College of Radiology 4
Delayed diagnosis due to negative initial radiographs can lead to functional impairment, as reported by the American College of Radiology 1