CA9 and anaplastic large cell lymphoma: In another case-report on an unusual presentation of BIA-ALCL with no mass formation or capsular infiltration but with lymph adenopathy, CA-9 was expressed in neoplastic cells of primary tumor and in the lymph node but not in areas of diffuse lymph node involvement which is why they suggested that the hypoxic program could be involved early after metastasis but disappear in more extensive spread and vascularization [18].