I was fairly certain this was a calcified cyst. They are common in younger patients and are generally very firm with a purple/blue hue to them on the surface. However, just like a box of chocolates, you never know what you are going to get until you get down in it. Trickster cyst. Deep cyst under pressure. Cyst pop. Full removal and closure. Dermatology Excision. Greg Lynch Derm PA-C. MrPopZit.