Quadruplet induction, autologous hematopoietic cell transplant (AHCT), and measurable residual disease (MRD) response‐adapted consolidation yield an unprecedented depth of response in newly diagnosed multiple myeloma. Patients treated on MASTER (NCT03224507) ceased therapy and entered active surveillance (MRD‐SURE) after achieving MRD negativity. This study characterizes quantitative changes in the immunoglobulin (Ig) gene repertoire by next‐generation sequencing and serum gamma globulin levels. Quadruplet therapy leads to profound hypogammaglobulinemia and reduction in the Ig gene repertoire. Immune reconstitution (IR) is delayed in patients who received post‐AHCT consolidation compared to those who do not. Eighteen months after treatment cessation, there was no statistically significant difference between the groups.

Increased access to genetic counseling services is of prime importance in minority and underserved populations where genetic testing is currently underutilized. Our study tested a point of care screening tool to identify high-risk low-income patients for genetic counseling in a busy county hospital oncology clinic. Eligible breast patients treated at a "safety-net" hospital, were scored into 'high-risk' (> or = 6) or 'low-risk' (< 6) groups using a screening tool on personal and family history of cancer. Genetic counseling and testing were provided at the Vanderbilt Hereditary Cancer Program (VHCP) to all 'high-risk' and some 'low-risk' participants considered to need genetic counseling by their oncologist. Ninety-nine women with a history of breast cancer were enrolled onto the study over a period of 26 months. 53.5% (53/99) had a 'high-risk' score and ethnic predominance of African-American (60.4%). Of these, 67.9% (36/53) were counseled, and 91.6% (33/36) tested with a 9% (3/33) mutation positive rate. In the 'low-risk' group, 28.2% (13/46) still met current NCCN guidelines and were referred by their oncologist. 69.2% (9/13) were counseled and tested. The 'low-risk' group of predominantly Caucasian (41.3%) participants carried a 20% (2/10) mutation positive rate; which was later adjusted to 10% to exclude a mutation not conferring a strong breast cancer risk. The screening tool was well accepted by patients; and increased access to genetic counseling. There was a subset of breast cancer affected women under 45 with no reported family history that failed to be identified. Minor alterations to the tool would enhance concordance with current NCCN guidelines.

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