Ultrasound guided biopsy.
Using ultrasound guidance and sterile technique the skin was infiltrated near the angle of the mandible, and an 18 gauge core biopsy needle passed into the carotid sheath mass.
Manual deployment of a 10 mm core biopsy was performed, carefully avoiding arterial structures nearby.
Single sample obtained appeared approximately 4 mm long, and this was sent in formalin for histology.
The patient was recovered in the department, and no immediate complication noted.