TY - JOUR
T1 - Which patients with ES-SCLC are most likely to benefit from more aggressive radiotherapy
T2 - A secondary analysis of the Phase III CREST trial
AU - Slotman, Ben J.
AU - Faivre-Finn, Corinne
AU - van Tinteren, Harm
AU - Keijser, Astrid
AU - Praag, John
AU - Knegjens, Joost
AU - Hatton, Matthew
AU - van Dam, Iris
AU - van der Leest, Annija
AU - Reymen, Bart
AU - Stigt, Jos
AU - Haslett, Kate
AU - Tripathi, Devashish
AU - Smit, Egbert F.
AU - Senan, Suresh
N1 - Publisher Copyright:
© 2017 The Author(s)
PY - 2017/6/1
Y1 - 2017/6/1
N2 - Introduction In ES-SCLC patients with residual intrathoracic disease after first-line chemotherapy, the addition of thoracic radiotherapy reduces the risk of intrathoracic recurrence, and improves 2-year survival. To identify patient subgroups for future trials investigating higher dose (extra)thoracic radiotherapy, we investigated the prognostic importance of number and sites of metastases in patients included in the CREST trial. Materials/ methods Additional data on sites and numbers of metastases were collected from individual records of 260 patients from the top 9 recruiting centers in the randomized CREST trial (53% of 495 study patients), which compared thoracic radiotherapy (TRT) to no TRT in ES-SCLC patients after any response to chemotherapy. All patients received prophylactic cranial irradiation. Results The clinical characteristics and outcomes of the 260 patients analyzed here did not differ significantly from that of the other 235 patients included in the CREST trial, except that fewer patients had a WHO = 0 performance status (24% vs 45%), and a higher proportion had WHO = 2 (15% vs 5%; p < 0.0001). No distant metastases were recorded in 5%, 39% had metastases confined to one organ, 34% to two, and 22% to three or more organ sites. Metastases were present in the liver (47%), bone (40%), lung (28%), extrathoracic (non-supraclavicular) lymph nodes (19%), supraclavicular nodes (18%), adrenals (17%) and other sites (12%). The OS (p = 0.02) and PFS (p = 0.04) were significantly better in patients with 2 or fewer metastases, with OS significantly worse if liver (p = 0.03) and/or bone metastases (p = 0.04) were present. Discussion This analysis of patients recruited from the top 9 accruing centers in the CREST trial suggests that future studies evaluating more intensive thoracic and extra-thoracic radiotherapy in ES-SCLC should focus on patients with fewer than 3 distant metastases.
AB - Introduction In ES-SCLC patients with residual intrathoracic disease after first-line chemotherapy, the addition of thoracic radiotherapy reduces the risk of intrathoracic recurrence, and improves 2-year survival. To identify patient subgroups for future trials investigating higher dose (extra)thoracic radiotherapy, we investigated the prognostic importance of number and sites of metastases in patients included in the CREST trial. Materials/ methods Additional data on sites and numbers of metastases were collected from individual records of 260 patients from the top 9 recruiting centers in the randomized CREST trial (53% of 495 study patients), which compared thoracic radiotherapy (TRT) to no TRT in ES-SCLC patients after any response to chemotherapy. All patients received prophylactic cranial irradiation. Results The clinical characteristics and outcomes of the 260 patients analyzed here did not differ significantly from that of the other 235 patients included in the CREST trial, except that fewer patients had a WHO = 0 performance status (24% vs 45%), and a higher proportion had WHO = 2 (15% vs 5%; p < 0.0001). No distant metastases were recorded in 5%, 39% had metastases confined to one organ, 34% to two, and 22% to three or more organ sites. Metastases were present in the liver (47%), bone (40%), lung (28%), extrathoracic (non-supraclavicular) lymph nodes (19%), supraclavicular nodes (18%), adrenals (17%) and other sites (12%). The OS (p = 0.02) and PFS (p = 0.04) were significantly better in patients with 2 or fewer metastases, with OS significantly worse if liver (p = 0.03) and/or bone metastases (p = 0.04) were present. Discussion This analysis of patients recruited from the top 9 accruing centers in the CREST trial suggests that future studies evaluating more intensive thoracic and extra-thoracic radiotherapy in ES-SCLC should focus on patients with fewer than 3 distant metastases.
KW - Extensive stage
KW - Metastases
KW - Small cell lung cancer
KW - Thoracic radiotherapy
UR - http://www.scopus.com/inward/record.url?scp=85016770261&partnerID=8YFLogxK
U2 - 10.1016/j.lungcan.2017.03.007
DO - 10.1016/j.lungcan.2017.03.007
M3 - Article
C2 - 28625628
AN - SCOPUS:85016770261
SN - 0169-5002
VL - 108
SP - 150
EP - 153
JO - Lung Cancer
JF - Lung Cancer
ER -