[“common warts”] Multiple hyperkeratotic, elevated, discrete epithelial growths with papillated surface.
[“ringworm”] Pruritic, scaly, round/oval plaque with central clearing on the clavicle. (Courtesy of Dr. L. From)
Two erythematous, painless round chancres on penis. Source: DermNet (https://dermnetnz.org/topics/syphilis-images) Creative Commons Attribution-NonCommercial-NoDerivs 3.0 (New Zealand)
Commonly affecting palms and soles with oval, flat-topped scaling, non-pruritic red-brown papules or plaques. Source: https://dermnetnz.org/topics/syphilis
Small crusted papules, eczematous plaques, intense pruritus and excoriations, and superficial linear burrows.