RecruitingBiological interventionTransgene Assay Testing Service of Tumor Samples From Patients Who Received a Bristol-Myers Squibb Manufactured Gene Modified Cell Therapy and Have a Qualifying Second Primary MalignancyThe purpose of this transgene assay testing service is to evaluate tumor samples for transgene levels in patients who received a commercially available Bristol-Myers Squibb manufactured gene modified cellular therapy and have reported a qualifying second malignancy.