Clinicopathologic concordance and histopathologic diagnoses in 56 patients who were either clinically diagnosed with systemic lupus erythematosus or have a prior history of systemic lupus erythematosus who underwent skin biopsy for new skin changes
| Concordance between clinical diagnosis and biopsy results | Number of patients (percentage of total) | Histopathologic diagnosis | Number of patients (percentage of subset) |
| Concordant | 43 (76.7%) | Subacute cutaneous lupus erythematosus | 18 (41.9%) |
| Urticarial vasculitis | 6 (14.0%) | ||
| Discoid lupus | 4 (9.3%) | ||
| Melanocytic nevus | 3 (7.0%) | ||
| Contact dermatitis | 2 (4.7%) | ||
| Drug eruption | 2 (4.7%) | ||
| Calcinosis cutis | 1 (2.3%) | ||
| Haemangioma | 1 (2.3%) | ||
| Livedoid vasculopathy | 1 (2.3%) | ||
| Basal cell carcinoma | 1 (2.3%) | ||
| Dermatofibroma | 1 (2.3%) | ||
| Molluscum contagiosum | 1 (2.3%) | ||
| Pyoderma gangrenosum | 1 (2.3%) | ||
| Lichenoid keratosis | 1 (2.3%) | ||
| Discordant | 13 (27.1%) | Psoriasiform changes | 5 (38.5%) |
| Spongiotic/nummular dermatitis | 4 (30.8%) | ||
| Folliculitis | 1 (7.7%) | ||
| Fungal dermatitis | 1 (7.7%) | ||
| Verrucal keratosis | 1 (7.7%) | ||
| Hypertrophic lichen planus | 1 (7.7%) |