[Axillary Lymph Node Dissection and Chemotherapy were Useful for Occult Cancer - Report of a Case].

We report a case of occult cancer. In this case, axillaryly mph node dissection and chemotherapywere useful treatments. The patient was a 71-year-old woman who had left axillaryly mph node swelling. Mammographyshowed the swollen axillary lymph nodes, but there was no lesion in either breast. Ultrasonographyalso showed the swollen axillaryly mph nodes, but there was no malignant lesion in her breasts. CT showed swollen axillaryand mediastinal lymph nodes. We checked her entire body, but could not find a malignant lesion, so we diagnosed an occult cancer. She underwent axillary lymph node dissection. The pathological diagnosis from the resected surgical specimen was metastatic carcinoma, negative for ER and PgR, and negative for HER2/neu protein expression. She was given TC chemotherapyand her CEA value decreased. After 8 cycles of TC chemotherapy, she was well without metastasis.