OBJECTIVETo insight whether PYM emulsion induces apoptosis more rapidly in proliferating capillary hemangiomas so as to find the optimal method for hemangiomas' treatment.

METHODSThirty volunteers of infantile proliferating hemangiomas were divided into control group (15 cases) and mediational group (15 cases). PYM was made into emulsion and smeared on the surfaces of the lesion in mediational group with 3 times every day as well as only matrix in control group. The specimens were resected on day 7, then made into pathological slices and electron microscope slices in order to observe the cells microcosmic structure changes and ultrastructure changes. Furthermore , the apoptotic index of two groups were detected by the molecular biology method (TUNEL test ).

RESULTSThe number of apoptotic cells were lower in control group (AI 9.693 +/- 4.948) but higher apparently in mediational group (AI 39.373 +/- 15.927). The difference between two groups was significant (t = 6.893, P < 0.01) .

CONCLUSIONSPYM emulsion can effectively accelerate apoptosis in infantile proliferating capillary hemangiomas . The mechanism is supposed to related to the blockage of cell cycle and activation of apoptotic signal transduction pathway.