The lunate dislocation results from a backwards fall on an outstretched hand. Here, the capitate is aligned with the radius on the lateral view with volar displacement of the lunate. This is the most severe injury on the perilunate continuum with the greatest number of intercarpal ligaments disrupted.

A	Lateral radiograph of the wrist. This shows volar displacement of the lunate.
B	PA radiograph of the wrist. This depicts the abnormal relationship between the scaphoid and the lunate.
C	Oblique radiograph of the wrist. This shows the abnormal carpal bone relationships.

Links to online textbooks:

• Wheeless' Orthopedics: discussion of perilunate dislocations

Links to online cases:

• Emedicine.com
• American Family Physician

References:

• Voorhees DR, Daffner RH, Nunley JA, Gilula LA: Carpal ligamentous disruptions and negative ulnar variance Skeletal Radiol. 1985;13(4):257-62.           [See related articles]
• Meyer S: Radiographic evaluation of wrist trauma Semin Roentgenol. 1991 Oct;26(4):300-17.           [See related articles]