A 23-year-old lady was driving her car when she had to apply brakes suddenly. She suffered from “steering wheel” injury in the right breast. After 5 days of pain and tenderness at the site of trauma, she noticed the presence of “lump” which was persistent since the day of trauma. Dr. M. Spartan does an excision biopsy and observed the presence of an amorphous basophilic material within the mass. The amorphous material is an example of