LA JOLLA, CALIF. – Data from the Czech National Lymphoma Registry (NiHiL) suggest the CHOEP regimen (cyclophosphamide, doxorubicin, vincristine, etoposide, and prednisone) prolongs survival in newly diagnosed patients with peripheral T-cell lymphoma (PTCL), but consolidation with autologous stem cell transplant (ASCT) does not.
“We failed to show that there is a real benefit for the patient to undergo autologous stem cell consolidation, so, nowadays, in the majority of the centers in our group, CHOEP is the chemotherapy of choice, and the patients are not consolidated,” said Marek Trneny, MD, of Charles University General Hospital in Prague.
Dr. Trneny presented results from NiHiL on behalf of the Czech Lymphoma Study Group at the annual T-cell Lymphoma Forum.
The NiHiL project is a prospective, observational study () of patients newly diagnosed with non-Hodgkin lymphoma in the Czech Republic.
Dr. Trneny presented data on 838 PTCL patients who were diagnosed between 1999 and 2018, 462 of whom were included in a survival analysis (1999-2016).
The 462 patients had a median age of 61 years and more than half were men.
Patients had PTCL not otherwise specified (NOS, 43.9%), Anaplastic lymphoma kinase (ALK)–negative Anaplastic large-cell lymphoma (ALCL, 20.8%), ALK-positive ALCL (7.6%), unclassified ALCL (0.9%), angioimmunoblastic T-cell lymphoma (AITL, 10.6%), and other subtypes (16.2%).
Most patients (79.1%) had tumors measuring less than 7.5 cm, about half of patients (52.3%) had B symptoms, most (70.5%) had a performance status of 0-1, and most (68.5%) had stage III-IV disease. Half of patients were low or low/intermediate risk according to the International Prognostic Index.
For the entire cohort, the median progression-free survival (PFS) was 1.15 years, and the 5-year PFS rate was 34.2%. The median overall survival (OS) was 2.83 years, and the 5-year OS rate was 43.3%.
There was no significant difference in PFS or OS for patients diagnosed from 1999 to 2007 and those diagnosed from 2008 to 2016. The median PFS was 1.05 years and 1.23 years, respectively (P= .4487), and the median OS was 2.15 years and 3.39 years, respectively (P = .176).
Patients with ALK-positive ALCL had superior PFS and OS when compared to patients with the other disease subtypes (P = .0002 for PFS and P = .0009 for OS).
When Dr. Trneny and his colleagues compared the 223 patients who received CHOP (cyclophosphamide, doxorubicin, vincristine, and prednisone) and the 65 patients who received CHOEP, the researchers found that patients who received CHOEP had superior PFS and OS.
In the CHOP group, the median PFS was 1.18 years and the 5-year PFS rate was 34.2%. In the CHOEP group, the median PFS was 3.67 years and the 5-year PFS rate was 49.0% (hazard ratio, 0.6781; P = .0373).
In the CHOP group, the median OS was 3.74 years and the 5-year OS was 45.5%. In the CHOEP group, the median OS was 7.46 years and the 5-year OS was 56.4% (HR, 0.6475; P = .0381).
Dr. Trneny noted that patients who received CHOP were significantly younger (P less than .0001), more likely to have AITL or ALK-positive ALCL (P = .0152), and more likely to have a performance status of 2-4 (P = .0385).
Dr. Trneny and his colleagues also compared survival in 56 ASCT recipients and 189 patients who received chemotherapy alone (either CHOP or CHOEP).
Patients who underwent ASCT were significantly younger (P less than .0001) and more likely to have stage III or IV disease (P = .0345).
However, the researchers found no significant survival differences between patients who underwent ASCT and those who did not.
ASCT recipients had a median PFS of 7.50 years and a 5-year PFS rate of 56.0%, while patients who received chemotherapy alone had a median PFS of 4.69 years and a 5-year PFS rate of 47.3% (P = .6537).
In ASCT recipients, the median OS was not reached, and the 5-year OS rate was 63.3%. Among patients who received chemotherapy alone, the median OS was 6.78 years, and the 5-year OS was 63.0% (P = .6201).
“For those patients who are eligible for a CHOP-like regimen, CHOEP gives a higher chance for longer progression-free survival and overall survival, at least in our ... analysis,” Dr. Trneny said. “Autologous stem cell transplant, on the other hand, doesn’t seem to prolong PFS or overall survival.”
This research is sponsored by the Czech Lymphoma Study Group. Dr. Trneny did not disclose any conflicts of interest.
The T-cell Lymphoma Forum is held by Jonathan Wood & Associates, which is owned by the same company as this news organization.