Subclavian brachial plexus metastasis from breast cancer: A case report

Figure 1 Ultrasound showed a soft lesion which located on the right side of the clavicle to the armpit subcutaneously. A: This soft lesion is 38 mm × 37 mm with blurred boundaries and uneven hypoechoic echogenicity. The lesion’s boundary with the brachial plexus (orange arrow) is not clear; B: Axillary artery (the thick arrow) can be seen beside this lesion.

Figure 2 Magnetic resonance imaging brachial plexus scan showed the right side of brachial plexus was enlarged compared with the left side. Brachial plexus bundle in the distance showed a flake shadow.

Figure 3 ¹⁸F-fluorodeoxyglucose positron emission tomography and computed tomography revealed that the right side of brachial plexus nodular appearance with increased ¹⁸F-fluorodeoxyglucose metabolism, a SUVmax of 13. 7.

Figure 4 Brachial plexus metastasis from breast cancer. A: The patient underwent lesion punctuation under ultrasound guidance and the lesion was sent for pathology; B: Pathology showed large areas of tumor cells in fibroblast tissue. Immunohistochemistry showed the following results: A2-1: GATA3 (+), ER (+, strong, 90%), PR (+, moderate, 10%), HER-2 (3+), Ki67 (+15%), P120 (membrane+), P63 (-), E-cadherin (+), CK5/6 (-).