Image 20:
An orang asli (aborigine) presented with this chronic non-itchy rash, of several years duration.Several individuals in his kampong had the same.
Diagnosis:
The classically whorled appearance of the dermatophyte Trychophyton concentricum (tinea imbricata) found commonly in Southeast Asia, the South Pacific, parts of Brazil, etc. There may be a genetic predisposition.