Erythrasma

I have often heard "erythrasma" considered as a DDx when evaluating a patient with cellulitis. Here is the low down on it:

- Commonly presents in intertriginous areas of the body (skin folds, between toes, etc).
- High incidence in humid areas and in diabetic patients.
- Often is a secondary infection to tinea

- Caused by corynebacterium minutissimum
- Can dx using a woods lamp, causing it to turn corral red.
- Clinical presentation is scaling, fissuring and slightly macerated, resembling tinea.
- Common between 3rd and 4th digits (2nd interspace)

- Treated with oral Erythromyocin(binds 50S) or Tetracycline(not currently available in US).
- Relapse is common.