Intratumoral doxycycline for skin metastases of human malignancies

As soon as its inducibility of lethality via prompt deprivation of heavy metals and HDL-cholesterol was born out, an intratumoral administration of doxycycline, an anti-prokaryotic agent, was undertaken in 7 patients presenting with skin metastases from a variety of malignancies. Complete remission of these lesions was attained in 6. The histological observation of elongated areas of acellularity along with central vessels appeared to suggest doxycycline-mediated cellular disintegration, resulting in empty tumor cords. Specific tumor selectivity of the treatment can be sustained by the intra- and/or peri-tumoral confinement of the agent. The technique may constitute a novel mode of cancer cell elimination.