Table 2.
Clinical characteristics, radiographic investigations, and studies leading to a definitive diagnosis of and organisms in pyomyositis in systemic lupus erythaematosus
| Clinical characteristic | n (%) |
|---|---|
| Female | 23/23 (100.0) |
| Temperate zone pyomyositis: tropical zone pyomyositis | 18:5/23 (78.3:21.7) |
| Affected sides | 22 |
| Right | 11 (50.0) |
| Left | 8 (36.4) |
| Bilateral | 3 (13.6) |
| Radiographic investigations | 20 |
| Ultrasound | 7 (35.0) |
| CT | 12 (60.0) |
| MRI | 9 (45.0) |
| Studies leading to a definitive diagnosis | 23 |
| Pus culture | 19 (82.6) |
| Tissue culture | 2 (8.7) |
| Blood culture | 1 (4.3) |
| No specimen (therapeutic diagnosis) | 1 (4.3) |
| Organisms | 23 |
| Staphylococcus aureus | 13 (56.5) |
| Salmonella spp | 2 (8.7) |
| Mycobacteria | 3 (13.0) |
| Other (Escherichia coli or Klebsiella pneumoniae) | 2 (8.7) |
| Unknown non-mycobacteria | 2 (8.7) |
| Mixed Staphylococcus aureus and Mycobacterium tuberculosis | 1 (4.3) |