Evolutionary trajectories of small cell lung cancer under therapy.

The evolutionary processes that underlie the marked sensitivity of small cell lung cancer (SCLC) to chemotherapy and rapid relapse are unknown1-3. Here we determined tumour phylogenies at diagnosis and throughout chemotherapy and immunotherapy by multiregion sequencing of 160 tumours from 65 patients. Treatment-naive SCLC exhibited clonal homogeneity at distinct tumour sites, whereas first-line platinum-based chemotherapy led to a burst in genomic intratumour heterogeneity and spatial clonal diversity. We observed branched evolution and a shift to ancestral clones underlying tumour relapse. Effective radio- or immunotherapy induced a re-expansion of founder clones with acquired genomic damage from first-line chemotherapy. Whereas TP53 and RB1 alterations were exclusively part of the common ancestor, MYC family amplifications were frequently not constituents of the founder clone. At relapse, emerging subclonal mutations affected key genes associated with SCLC biology, and tumours harbouring clonal CREBBP/EP300 alterations underwent genome duplications. Gene-damaging TP53 alterations and co-alterations of TP53 missense mutations with TP73, CREBBP/EP300 or FMN2 were significantly associated with shorter disease relapse following chemotherapy. In summary, we uncover key processes of the genomic evolution of SCLC under therapy, identify the common ancestor as the source of clonal diversity at relapse and show central genomic patterns associated with sensitivity and resistance to chemotherapy.

Recommending early integration of palliative care - does it work?

BACKGROUND: In 2006, our comprehensive cancer center decided to implement early integration (EI) of palliative care (PC) by (a) literally adopting the WHO definition of PC into cancer care guidelines and (b) providing a PC consulting team (PCST) to provide EI on in- and outpatient wards. The experience with this approach was assessed to identify shortcomings. METHODS: A retrospective systematic chart analysis of a 2-year period was performed. RESULTS: A total of 862 patients were treated (May 2006-April 2008). Many patients consulted by the PCST for the first time were already in a reduced performance status (ECOG 3 & 4: 40%) or experiencing burdening symptoms (i.e., dyspnoea 27%). After the first year (period A; "getting started"), the overall prevalence of symptoms identified on first PC contact decreased from seven to three, (p < 0.001) as well as surrogate measures for advanced disease (i.e., frailty: from 63% to 33%; CI: [-36%; -23%], p < 0.001). CONCLUSION: Surrogate measures (symptom burden, performance status) indicate that PC was integrated earlier in the course of the disease after a 1-year phase of "getting started" with EI. Yet, the WHO recommendation alone was too vague to successfully trigger EI of PC. Therefore, the authors advocate the provision of disease specific guidelines to institutionalize EI of PC. Such guidelines have been developed for 19 different malignancies and are presented separately.

Early prediction of nonprogression in advanced non-small-cell lung cancer treated with erlotinib by using [(18)F]fluorodeoxyglucose and [(18)F]fluorothymidine positron emission tomography.

PURPOSE: Positron emission tomography (PET) with both 2'-deoxy-2'-[(18)F]fluoro-D-glucose (FDG) and 3'-[(18)F]fluoro-3'-deoxy-L-thymidine (FLT) was evaluated with respect to the accuracy of early prediction of nonprogression following erlotinib therapy, independent from epidermal growth factor receptor (EGFR) mutational status, in patients with previously untreated advanced non-small-cell lung cancer (NSCLC). PATIENTS AND METHODS: Thirty-four patients with untreated stage IV NSCLC were evaluated in this phase II trial. Changes in FDG and FLT uptake after 1 (early) and 6 (late) weeks of erlotinib treatment were compared with nonprogression measured by computed tomography after 6 weeks of treatment, progression-free survival (PFS), and overall survival (OS). RESULTS: Changes in FDG uptake after 1 week of therapy predicted nonprogression after 6 weeks of therapy with an area under the receiver operating characteristic curve of 0.75 (P = .02). Furthermore, patients with an early metabolic FDG response (cutoff value: 30% reduction in the peak standardized uptake value) had significantly longer PFS (hazard ratio [HR], 0.23; 95% CI, 0.09 to 0.59; P = .002) and OS (HR, 0.36; 95% CI, 0.13 to 0.96; P = .04). Early FLT response also predicted significantly longer PFS (HR, 0.31; 95% CI, 0.10 to 0.95; P = .04) but not OS and was not predictive for nonprogression after 6 weeks of therapy. CONCLUSION: Early FDG-PET predicts PFS, OS, and nonprogression after 6 weeks of therapy with erlotinib in unselected, previously untreated patients with advanced NSCLC independent from EGFR mutational status.

Specifying WHO recommendation: moving toward disease-specific guidelines.

INTRODUCTION: The World Health Organization (WHO) explicitly recommends the integration of palliative care (PC) early in the disease trajectory as part of the WHO definition of PC. Our comprehensive cancer center decided: (1) to include this recommendation in the administrative directives for principles of cancer care and (2) to establish a PC hospital support team. The evaluation of this approach revealed that patients with lung cancer still received PC rather late in the course of the disease. Therefore, we decided to additionally develop disease-specific standard operating procedures (SOPs) to try to overcome these deficiencies. The first SOP was completed for patients with lung cancer. STANDARD OPERATING PROCEDURE (Consensus SOP): Specifically, the SOP states that: "Specialized PC is recommended regularly for all lung cancer patients without curative treatment options, specifically patients with (i) metastasized and inoperable or (ii) locally advanced and inoperable or (iii) relapsing lung cancer. Integration of PC is recommended simultaneously to starting tumor-specific therapy. In this context, initial PC should be delivered to the patient at the same place as specific treatment, which is the interdisciplinary outpatient unit of the Center of Integrated Oncology (CIO) or an oncological ward." DISCUSSION: This SOP for the first time presents disease-specific guidelines for PC integration into comprehensive (lung) cancer therapy by (1) defining "green flags" for early integration of PC and (2) recommending PC parallel to initiation of anticancer therapy. Furthermore, clear definitions are provided to delineate PC assignments. Such disease-specific algorithms should be helpful to further reduce uncertainty about the way PC can be integrated early in the course of the disease.