ESR1 and metastatic malignant neoplasm in the lymph nodes: Eleven (29.72%) patients had multiple metastases, in which one (2.7%) patient had lung and bone metastases with ER−, two (5.41%) patients had lung, clavicle area, and/or inner mammary area lymph node metastases with ER−, eight (21.62%) patients had bone, clavicle area, and/or inner mammary area lymph node metastases (five [13.51%] patients with ER− and three [8.11%] patients with ER+).