Arthritis, Psoriatic

FIGURE 3.34 Psoriatic arthritis. "Sausage finger deformity" of the distal interphalangeal joint. Note onycholysis.

FIGURE 3.35 Psoriatic arthritis ("arthritis mutilans"). This patient has severe psoriatic arthritis with marked deformities and subluxations of the small bones of the hands. Note also the characteristic onycholysis on the nails.

<bold>FIG. 129.1.</bold> Psoriatic arthritis in a patient with human immunodeficiency virus disease.

<bold>FIG. 65.2.</bold> Asymmetric polyarthritis resembling rheumatoid arthritis in a patient with psoriasis.

<bold>FIG. 65.4.</bold> Psoriatic arthritis involving the metacarpophalangeal and proximal interphalangeal joints of the index finger with an associated flexor tenosynovitis. This combination gives rise to the "sausage" digit.

<bold>FIG. 65.9.</bold> "Whittling" of the middle phalanx and expansion of the base of the distal phalanx—the "pencil-in-cup" deformity.

<bold>FIG. 65.10.</bold> Bony ankylosis of distal interphalangeal joints in a patient with psoriatic arthritis.

<bold>FIG. 65.15.</bold> Psoriatic arthritis with axial involvement. The patient was HLA-B27^﹢ and had no radiologic evidence of sacroiliitis, but atypical syndesmophytes are observed.

<bold>Fig B 10-9. Psoriatic arthritis.</bold> Views of both hands and wrists demonstrate ankylosis across many of the interphalangeal joints with scattered erosive changes involving several interphalangeal joints, most of the metacarpophalangeal joints, and the interphalangeal joint of the right thumb. Note the striking asymmetry of involvement of the carpal bones, an appearance unlike that expected in rheumatoid arthritis.

<bold>Fig B 10-9. Psoriatic arthritis.</bold> Views of both hands and wrists demonstrate ankylosis across many of the interphalangeal joints with scattered erosive changes involving several interphalangeal joints, most of the metacarpophalangeal joints, and the interphalangeal joint of the right thumb. Note the striking asymmetry of involvement of the carpal bones, an appearance unlike that expected in rheumatoid arthritis.

<bold>FIG. 65.3.</bold> Long-standing psoriatic arthritis with a symmetric distribution. This patient had a "claw deformity" due to bony ankylosis of the proximal and distal interphalangeal joints.

<bold>FIG. 65.11.</bold> Complete destruction of middle proximal interphalangeal joint. Also note bony ankylosis of corresponding distal interphalangeal joint.

Figure 10-154 <bold>SKELETAL DISTRIBUTION OF PSORIATIC ARTHRITIS.</bold>

Fig. 6. Anteroposterior view of the lumbar spine in a patient with psoriatic arthritis. There is paravertebral ossification with bulky bridging syndesmophytes in a bilateral, asymmetric distribution. Contrast this to the symmetric pattern in Figure 5.