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(A) Probe and needle position to perform LTN block at the axillary level. (B) Pm: pectoralis minor, R: rib, PL: pleural line, asterisk: Lateral thoracic artery and the LTN at the level of the anterior axillary line. (C) Thoracodorsal artery and the thoracodorsal nerve (TDN) are visualized by moving the probe posteriorly from its position in Panel A. LTN: long thoracic nerve, TDA: thoracodorsal artery.
