Becker’s nevus is an uncommon (but not rare) benign skin lesion. “Nevus” is another word for a mole and as such this growth appears as a very large and irregularly shaped mole. Which can be present at birth but most appear in puberty.
Cutanea larva migrans is skin condition caused by infection with a parasitic worm.
Cutis marmorata is the name given to a skin condition which appears as a faint, lacy, and red/blue pattern. The image shows the affected areas outlined in red.
Chancroid is a sexually transmitted disease caused by the organism Haemophilus ducreyi – a bacteria. The hallmark of this disease is an exquisitely painful ulcer on the genitals.