FIELD: medicine, oncology. SUBSTANCE: suggested preparation represents graphite hydrosulfate of the following formula C+
24
HSO-
4
H2SO4 containing about 1 g sulfuric acid/g graphite at liquid density being 1.815 g/cm3. Moreover, the preparation is declared containing graphite hydrosulfate and a filler at volumetric ratios being 1:2 - 1:1. Method to treat patients is characterized by applying the preparation either as the liquid or an ointment upon affected cutaneous area. The innovation has a selective action upon tumor vessels by not destroying the connective tissue of adjacent cutaneous areas. EFFECT: higher penetrating capacity. 9 cl