Middle aged female with thyroid nodule.Performing a radio-logical ultrasound guided core biopsy.The biopsy needle working guide came apart.2 sets used with the same lot # and came apart in the same fashion.A third device was used without problems.No known harm to patient.Please make note that 2 devices that malfunctioned with the same lot number.There was another incident that did the same thing the week before, but the device was not saved.