Clinical characteristics of patients with arthritis mutilans (AM) reported in the last decade.
| Country | No. Cases | M/F | Age, yrs | Psoriasis Duration, yrs | Arthritis Duration, yrs | Site of AM | DMARD Therapy | Biologic Therapy Following AM Diagnosis |
|---|---|---|---|---|---|---|---|---|
| Spain3 | 24 | 12/12 | 56.3 | 20.8 | 17.7 | Hands and feet | S | No |
| New Zealand4 | 11 | 8/3 | 52 | 22 | 12 | NA | M; L; Su; S | No |
| Norway5 | 6 | 5/1 | NA | NA | NA | Hands | M; S | No |
| Italy (current series) | 4 | 1/3 | 71 | 38.7 | 21 | Hands | M; Su; E | No |
| Columbia6 | 4 | 2/2 | 57.8 | 13 | 6 | Hands and feet | M | No |
| USA7 | 3 | 2/1 | 39.7 | 17 | 15.7 | Hands and feet | M, H, L, A | E |
| Portugal8 | 2 | 1/1 | 54.5 | NA | NA | Hands and feet | NA | NA |
| Ireland9 | 1 | 0/1 | 34 | 21 | 0.3 | Feet | None | No |
| Brazil10 | 1 | 1/0 | 55 | 25 | 18 | Hands | M | No |
| Croatia11 | 1 | 1/0 | 33 | 10 | 10 | Hands and feet | S; Su; M; H | No |
| New Zealand12 | 1 | 1/0 | 65 | 52 | 35 | Hands and feet | M | No |
| Spain13 | 1 | 1/0 | 62 | 10 | 10 | Hands and feet | L | E |
| Portugal14 | 1 | 1/0 | 39 | 20 | 20 | Hands | M | E |
| USA15 | 1 | 1/0 | 55 | 28 | 28 | Hands and feet | M | E |
| Scandinavia16 | 59 | 30/29 | NA | NA | 30 | Hands and feet | NA | NA |
DMARD: disease-modifying antirheumatic drug; A: azathioprine; H: hydroxychloroquine; L: leflunomide; M: methotrexate; S: steroid; Su: sulfasalazine; E: etanercept; NA: not available.