ANXA5 and spindle cell hemangioma: Apoptosis was monitored by FACS (fluorescence-activated cell sorting) analysis of annexin V-stained cells; annexin V detects externalized phosphatidylserines, a marker of early apoptosis.18 None of the agents tested induced apoptosis in the absence of SCH, and only AAG increased responsiveness to SCH (Figure 1c).