| Erythema annulare centrifugum | Pink annular plaque; centrifugal spread; central clearing; trailing white scale |
| Erythema chronicum migrans | Pink annular plaque; centrifugal spread; central clearing; no scale; with or without crusted or vesicular advancing edge |
| Erythema gyratum repens | Concentric erythematous bands; scale at the leading edge; “wood-grain” appearance; rapid spread (up to 1 cm per day) |
| Mycosis fungoides | Slow progression from patch to plaque to tumor stage over many years; early lesions are pinkish nummular or annular patches with or without thin scale and epidermal atrophy |
| Tinea corporis | Pink annular patches or plaques; slow centrifugal spread; central clearing; peripheral scale; potassium hydroxide positive |