Her treatment included multiple rounds of chemotherapy, followed by two bone marrow transplants — first using stem cells donated by her sister, and later from an unrelated donor. She also participated in clinical trials, including CAR-T cell therapy, as doctors pursued every possible option.

Throughout her illness, Schlossberg wrote movingly about motherhood, particularly her fear that her children might not remember her due to long hospital stays and infection risks that limited physical contact. An accomplished environmental journalist and author of Inconspicuous Consumption, Schlossberg continued writing when possible and emphasized that she did not want cancer to define her entire identity.