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Below, week by week, is what OnCo's record of Primary mediastinal (thymic) large B-cell lymphoma says about the first two months: the order is typical, the timing is yours to ask about. Primary mediastinal B-cell lymphoma is a fast-growing lymphoma of the thymus behind the breastbone that mostly affects young women. Immunochemotherapy cures about nine in ten, radiotherapy can now be skipped when the end-of-treatment scan is clear, and PD-1 antibodies and CAR-T cells rescue many of those who relapse. Sections appear only where the record has something to say. Orientation, not medical advice.
Staging tests establish exactly what and where the cancer is. Everything else follows from the answers.
Ask which of these were tested and what the results were; see the report reader for what each value means.
Written by hand for this cancer from NHS, Macmillan, Cancer Research UK and charity pages, each item naming the page it came from. The days and weeks are the typical order those pages describe, not a schedule; tick what applies to you.
These specialties appear in the standard of care for this cancer. In most centres they meet weekly as a tumour board to agree each plan; you can ask when yours was discussed and what was decided.
A second opinion from a centre that treats many similar cases is normal, not rude; the standard of care tells you what to compare it against.
Each row is a setting from the standard of care, in the order it usually arises. Not all will apply to you; your stage and biomarkers decide which do. The guideline grade, where recorded, says how strong the evidence is.
Dose-adjusted EPOCH-R for six cycles without radiotherapy, or R-CHOP for six cycles with PET-guided consolidation radiotherapy; end-of-treatment PET decides whether radiotherapy is needed (IELSG37).
Biopsy where feasible; involved-site radiotherapy to the mediastinum (30 to 36 Gy) for persistent uptake; salvage therapy for proven refractory disease.
A disease of young adults, more often women, presenting with a bulky mass between the lungs that can compress the superior vena cava. It is biologically closer to Hodgkin lymphoma than to diffuse large B-cell lymphoma, which is why PD-1 blockade works in it. Dose-adjusted EPOCH-R for six cycles is the regimen most used in the United States, on the strength of a National Cancer Institute series in which five-year event-free survival was 93 per cent and overall survival 97 per cent, with radiotherapy avoided in 96 per cent of patients. R-CHOP with consolidation radiotherapy is the alternative used in much of Europe. There has never been a randomised comparison of the two. What has been settled is the radiotherapy. IELSG37 randomised patients with a negative end-of-treatment PET to mediastinal radiotherapy or observation: 30-month progression-free survival was 96.2 per cent with observation against 98.5 per cent with radiotherapy, non-inferior, and overall survival was 99 per cent in both arms. Since the patients are young and the field sits over the heart and breasts, avoiding it matters for the next forty years. Radiotherapy is still given where the end-of-treatment PET is positive.
Salvage chemotherapy then autologous stem cell transplant if chemosensitive; pembrolizumab (KEYNOTE-170) or nivolumab plus brentuximab vedotin; CD19 CAR-T (axicabtagene ciloleucel, lisocabtagene maraleucel) after two lines or as second line for early relapse.
Relapse is uncommon and almost always early, within the first year. CD19 CAR-T is the treatment of choice and primary mediastinal disease was included in the pivotal ZUMA-1 and TRANSCEND populations. Where CAR-T is not available or has failed, pembrolizumab has an established role: KEYNOTE-170 treated 53 patients whose disease had relapsed after autologous transplant or who could not have one after two or more lines, and reported an objective response of 45 per cent and complete response of 13 per cent, which led to accelerated approval in the United States on 13 June 2018, converted to traditional approval on 14 October 2020. Nivolumab with brentuximab vedotin is the other checkpoint-based option. Salvage chemotherapy with autologous transplant is used where the disease is still chemosensitive and CAR-T is not accessible. Mediastinal radiotherapy is added to a residual localised site.
Generated from this cancer's standard of care, biomarkers and open problems. Take the group that matches where you are. To tick, add your own and print, open the one-page appointment sheet.
Trials open now for this cancer in OnCo, largest phase first. Joining a trial is a decision like any other: ask what the comparison arm is, whether a placebo is used, and what happens if you leave. The cancer page searches ClinicalTrials.gov live for more.
Much of what helps in the first weeks is free if you know to ask: testing, helplines, rides and lodging, second opinions, trial travel.
Every term links to the glossary.