A dark mole with a woolly border The woolly border seen on dermoscopy of blue naevi is because of the presence of deeply pigmented spindle melanocytes blending with the encompassing skin within the dermis. Case presentation An 18-year-previous man noticed a dark mole on his upper back , half a year to consultation prior. He experienced that the intensely pigmented mole had grown slowly in the interval Is acyclovir considered an antibiotic? . Excision biopsy uncovered a dermal infiltrate of deeply pigmented spindle-designed melanocytes, which extended into the surrounding dermis but lacked nuclear atypia or mitoses .