Fig. 1

Macroscopic and imaging findings of this complete regression of cutaneous MM on the right sole associated with right inguinal lymph node metastasis. a, b The patient had a solitary bluish to black patch with surrounding depigmentation, accompanied by recent decrease in size, measuring up to 20 mm in the right sole. In fact, he had noticed it as a gradually growing, hemorrhagic and verrucous hypopigmented macule since approximately 2 years before. Bar  2 cm. b In parallel, he suffered from a rapidly growing and painful black-pigmented mass lesion with surface skin ulcer at the right inguen especially for recent 2 months, partly extending to the right scrotum and thigh. Bar  5 cm. c A pelvic CT scan revealed a relatively well-defined huge and low-density mass with peripheral enhancement, measuring approximately 10 × 8 cm. Bar  5 cm