vertical growth phase

ver·ti·cal growth phase

spread of melanoma cells from the epidermis into the dermis and later the subcutis, from which site metastasis may take place.

ver·ti·cal growth phase

(vĕr'ti-kăl grōth fāz) Spread of melanoma cells from the epidermis into the dermis and later the subcutis, from which site metastasis may take place.