The invention is crustacean hemolymph as a utility for the pharmaceutical and/or cosmetic treatment of viral and other neoplastic or pre-neoplastic mammalian tissue lesions. The method comprises topically administering to mammalian tissue a formula that is made from lobster hemolymph—neat or lobster hemolymph extracts or lobster hemolyph in combination with certain carriers, binders or as an adjuvant. The hemolymph may be from various species of lobster, Homarus americanus in particular.