Is pre-treatment nodal ultrasound evaluation necessary if a patient undergoes upfront PET/CT for staging?

Does your institution routinely preform comprehensive nodal ultrasound evaluation for clinically node + breast cancer staging?

• No, we do not routinely do additional staging ultrasounds
• No, we only preform axillary ultrasound
• Yes, we routinely preform ultrasound of the axillary, supraclavicular, infraclavicular, and IM nodes
• Other