nevus cells were isolated from the three cutaneous components , epidermis , basal layer , and dermis , of nonmalignant pigmented lesions and were cultured separately in the presence or absence of the phorbol ester 12-0-tetradecanoyl phorbol-13-acetate in medium that supports the rapid proliferation of melanocytic cells .
C0014520
epidermis
C0221925
basal