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open 9 no The incidence of pancreatic cancer is increasing. Most patients have advanced disease at diagnosis, and therapeutics is limited in this setting. Gemcitabine and nab-paclitaxel combination is indicated as first-line treatment in patients with metastatic cancer of pancreas. The most common adverse events of Grade 3 or higher gemcitabine and nab-paclitaxel combination are neutropenia, fatigue and neuropathy. In this report, we describe a rare case of organizing pneu- monia associated with the use of nab-paclitaxel and gemcitabine in metastatic pancreatic cancer. A 68-year-old female underwent total splenopancreatectomy for ductal adenocarcinoma of the neck of the pancreas, followed by adjuvant chemoradiation therapy. Afterwards she relapsed and received first-line chemotherapy with gemcitabine plus nab-pa- clitaxel combination for 12 cycles. Following the administration of the 12th cycle of gemcitabine plus nab-paclitaxel, the patient experienced low-grade pyrexia, effort dyspnoea, persistent non-productive cough and malaise. High-resolution CT scan of chest revealed new-onset bilateral peripheral ground-glass opacities, smooth interlobular septal thickening and patchy subpleural consolidation areas, findings consistent with organizing pneumonia. A thorough microbiological workup was negative. Treatment with steroids resulted in prompt clinical and radiological improvement. Organizing pneumonia closely mimics infection or progressive disease and can be difficult to diagnose in the setting of malignancy. Correct diagnosis is of primary importance since delay in treatment can result in significantly adverse patient outcomes. open FRANCESCA COMITO, ELISA GRASSI, ANTONIO POERIO, EVA FREIER, LUCIA CALCULLI, MAURIZIO ZOMPATORI, CLAUDIO RICCI, RICCARDO CASADEI, MARIACRISTINA DI MARCO FRANCESCA COMITO, ELISA GRASSI, ANTONIO POERIO, EVA FREIER, LUCIA CALCULLI, MAURIZIO ZOMPATORI, CLAUDIO RICCI, RICCARDO CASADEI, MARIACRISTINA DI MARCO

Introduction: Intraductal papillary mucinous neoplasm (IPMN) is the most common cystic precancerous lesion of pancreatic cancer (PDA). IPMNs can progress from low to high-grade dysplasia, to invasive PDAC, but exact data regarding cancer risks are limited. PDAC is the fourth leading cause of cancer death . The overall 5-year survival is 6%, but survival of patients with early stage PDAC is significantly better. AIM: We used an approach coupling high resolution cytogenetic analysis (Affymetrix Oncoscan FFPE Array) with a clinically-oriented bioinformatic interpretation of data to understand what are the most relevant pathways altered in precursor lesions. Materials and methods: High resolution cytogenetic analysis was performed in 20 formalin fixed paraffin embedded samples of IPMNs by Oncoscan FFPE assay. Genomic data were analyzed for copy number gains and losses, loss of heterozygosity and for a panel of recurrent somatic mutations. Results were validated by qPCR and FISH analysis. Results: Twenty samples, including 14 mixed-type IPMNs (70%), 4 branch-duct IPMNs (20%) and 2 main-duct IPMNs (10%), were collected. We identified micro-invasive carcinoma (< 1 mm) and invasive carcinoma in 25% and in 10% of IPMNs respectively. By our high resolution cytogenetic analysis we observed that 8 IPMNs (40%) presented a nearly normal karyotype (< 4 copy number alterations), while 12 IPMNs (60%) showed a complex karyotype (> 10 alterations). In the latter subgroup were detected specific copy number gains of TERC and c-MYC oncogenes. Interestingly we noticed that TERC and c-MYC overexpression, present in 92% and 45% of complex karyotype samples respectively, were only observed in high-grade IPMNs, suggesting a possible role in a progression to malignancy. Oncoscan data were confirmed by Real Time and FISH analysis. Conclusions: Those results suggest a role of TERC and c-MYC overexpression as a possible biomarkers in the early identification of patients with complex karyotype IPMNs in order to better stratification of cystic lesions that could require surgery

Context. Despite pancreatic cancer (PC) genomic char- acterization, true advances in the development of prog- nosis classification and new therapeutic strategies have yet to come. Objective. We aimed to better understand genomic al- terations of invasive phenotype in order to improve pa- tient selection for treatment options. Methods. We analyzed 37 PC samples by either whole transcriptome or exome sequencing performed at 75- 100 bpx2 on an Illumina platform, matched with normal DNA to identify somatic events. Calls of single nucleo- tide variants and InDels were annotated with 1000 ge- nomes allele frequencies, dbSNP149 rsIDs, Exac and EVS using Oncotator. We detected the pathogenicity of the emerging variants by previous knowledge and bio- informatic mutation-prediction tools. Results. We highlighted 43 recurrently altered genes involving several pathways including chromatine re- modelling and DNA damage repair. The analysis limited on early stage patients (40% of samples) showed how a poor prognosis was significantly associated with a higher number of known PC mutations (pValue=0.047). The subgroup with better overall survival (>25 months) harbors an average of 24 events instead of the one with an overall survival

Despite the genomic characterization of pancreatic cancer (PC), marked advances in the development of prognosis classification and novel therapeutic strategies have yet to come. The present study aimed to better understand the genomic alterations associated with the invasive phenotype of PC, in order to improve patient selection for treatment options. A total of 30 PC samples were analysed by either whole transcriptome (9 samples) or exome sequencing (21 samples) on an Illumina platform (75X2 or 100X2 bp), and the results were matched with normal DNA to identify somatic events. Single nucleotide variants and insertions and deletions were annotated using public databases, and the pathogenicity of the identified variants was defined according to prior knowledge and mutation-prediction tools. A total of 43 recurrently altered genes were identified, which were involved in numerous pathways, including chromatin remodelling and DNA damage repair. In addition, an analysis limited to a subgroup of early stage patients (50% of samples) demonstrated that poor prognosis was significantly associated with a higher number of known PC mutations (P=0.047). Samples from patients with a better overall survival (>25 months) harboured an average of 24 events, whereas samples from patients with an overall survival of

Despite the genomic characterization of pancreatic cancer (PC), marked advances in the development of prognosis classification and novel therapeutic strategies have yet to come. The present study aimed to better understand the genomic alterations associated with the invasive phenotype of PC, in order to improve patient selection for treatment options. A total of 30 PC samples were analysed by either whole transcriptome (9 samples) or exome sequencing (21 samples) on an Illumina platform (75X2 or 100X2 bp), and the results were matched with normal DNA to identify somatic events. Single nucleotide variants and insertions and deletions were annotated using public databases, and the pathogenicity of the identified variants was defined according to prior knowledge and mutation-prediction tools. A total of 43 recurrently altered genes were identified, which were involved in numerous pathways, including chromatin remodelling and DNA damage repair. In addition, an analysis limited to a subgroup of early stage patients (50% of samples) demonstrated that poor prognosis was significantly associated with a higher number of known PC mutations (P=0.047). Samples from patients with a better overall survival (>25 months) harboured an average of 24 events, whereas samples from patients with an overall survival of

We have previously shown that acute psychological stress alerts the adaptive immune response causing an increase in antigen-experienced effector T cells in the peripheral blood. T regulatory cells (Tregs) play a central role in maintaining self-tolerance and controlling autoimmune responses. Here, we analyzed for the first time the behaviour of Tregs in the context of a stress-induced activation of the adaptive immune response. 31 healthy young males underwent a brief laboratory stressor and, in a crossover design, served as their own unstressed controls. We quantified effects of acute stress on CD4(+)FOXP3(+) T regulatory cells and other T cell subpopulations using flow cytometry. In addition, the expression of Treg-related effector molecules and stress hormone receptors were analyzed in the subjects' peripheral T cells. We confirmed our previous observation of a stress-induced decrease in CD45RA(+)CCR7(+) "naïve" and CD45RA(-)CCR7+ "central memory" T cells while CD45RA(-)-CCR7(-) "memory effector" and CD45RA(+)CCR7(-) "terminally differentiated" effector T cells remained stable or increased. Importantly, we found acute psychological stress to cause a concomitant decrease in CD4(+)FOXP3(+) Tregs and in CD4(+) T cells expressing Treg-related effector molecules cytotoxic T-lymphocyte antigen-4 (CTLA-4) and latency associated peptide (LAP). Finally, we observed beta(1)-adrenergic and glucorticoid alpha receptors to be overexpressed in Tregs, suggesting that these molecules might mediate stress-related effects on Tregs. In conclusion, inhibiting components of the adaptive immune response, like Tregs, are down-regulated during a stress-induced activation of the adaptive immune response. In situations of chronic stress, this scenario might result in an exacerbation of inflammatory conditions such as autoimmune diseases.

Acute psychological stress has primarily been investigated regarding its effects on conventional lymphocytes such as natural killer (NK) cells and CD4(+) and CD8(+) T cells. However, it might be important to focus on more "specialized" lymphocyte subsets, playing a role, for instance, in allergic conditions and autoimmunity, to identify links between stress, the immune system and somatic diseases. Using flow cytometry we determined frequencies of circulating T helper (Th)1-type (CD226(+)) and Th2-type (CRTH2(+)) T cells, γδ T cells, conventional CD56(+) natural killer T (NKT) cells and invariant NKT cells (iNKT) in healthy young males (N = 31; median age 26 years) undergoing a laboratory computer-based stressor lasting 12 min. We found that acute psychological stress induced a prolonged increase in CD4(+) and CD8(+) T cells expressing a Th2 phenotype. We also detected an acute increase in CD4(-) and CD8(-) double negative γδ T cells. Finally, we found that the well-known increase in NK cells under stressful conditions was paralleled by a significant increase in numbers of conventional CD56(+) NKT cells. In contrast, numbers of iNKT was not altered by stress. This study adds further evidence to a psychoneuroimmunological model proposing that under stressful conditions certain lymphocyte subsets, including iNKT and less mature T cells, are retained in lymphoid tissues while antigen-experienced effector-type T cells with a Th2 phenotype, γδ T cells and conventional CD56(+) NKT cells are mobilized into the peripheral blood. We suggest that in the case of frequent stress exposure, this might result in the promotion of, for example, allergic conditions.

Background Although small-cell lung cancer is a chemosensitive malignancy, most patients rapidly relapse. Results of second-line treatment are generally poor. We conducted a phase II study to evaluate the activity and toxicity of a combination of gemcitabine and paclitaxel as second-line chemotherapy. Patients and Methods Eligible patients were refractory or relapsed small-cell lung cancer, with an Eastern Cooperative Oncology Group performance status of 0-2 and measurable disease. Paclitaxel was administered at 135 mg/m 2 days 1 and 8 immediately followed by gemcitabine at 1000 mg/m 2 every 3 weeks up to 6 courses. Restaging of disease was scheduled every 3 courses. Results Forty-one patients were enrolled. The median age was 65 years. Nineteen patients were considered refractory (progressive disease during or within 90 days from completion of first-line treatment), whereas 22 patients were chemotherapy sensitive. A total of 135 courses was administered (range, 1-6; median, 3). Nine patients achieved a partial remission (partial response, 22%), and 10 patients had stable disease (24%), with a disease control rate (partial response + stable disease) of 46%: in 12 (55%) of 22 patients who were sensitive and in 7 (37%) of 19 patients with refractory disease, respectively. All partial responses but one were observed in the sensitive group. The median duration of response was 5 months. The most-frequent severe toxicities were neutropenia grade 3-4 and neurologic grade 3 in 24% and 7% of delivered courses, respectively. Conclusions The combination of gemcitabine and paclitaxel investigated in our study achieved a high disease control rate, but the schedule we adopted appeared to be quite toxic.

e15055 Background: In literature three studies have described KRAS status in SCAC: they analyzed 139 patients, only 1, 4% were mutated. In this study we analyzed BRAF and PIK3CA status. The evaluation of these two genes is important for predicting the response to anti-EGFR drugs. There is one study that values the positivity of HPV in SCAC. This study with few patients shows that the positivity of HPV16 is predictive for improvement of progression free survival (PFS). Methods: 79 patients were treated for anal cancer at the Oncology center of Forlì, Ravenna and Faenza in the last ten years. Up to now we analyzed 29 patients (9 with relapse of disease). DNA was extracted from paraffin-embedded sections and KRAS, BRAF and PIK3CA gene status were assessed by Pyrosequencing methodology, using 3 different kits: anti-EGFR MoAb response (KRAS status), anti-EGFR MoAb response (BRAF status), and anti- EGFR MoAb response (PIK3CA status) (Diatech, Jesi, Ancona, Italy). Reactions were run on a PyroMark Q96 ID (Qiagen). The presence and genotyping of Human Papilloma Virus (HPV) were assessed using the AMPLIQUALITY HPV-HS Bio and AMPLIQUALITY HPV-Type (AB ANALITICA, Padova, Italy) kit. Results: KRAS and BRAF genes were wild-type in all cases. Conversely, PIK3CA gene resulted mutated in 9 of 31 cases (28.1%). In particular, 7 mutations occurred in exon 9 (4 E454K and 3 E542K) and 2 in exon 20 (H1047R and H1047L) of the PIK3CA gene. Patients without relapse of disease were positive in 94% of cases for HPV16 and in 40% for mutation of PIK3CA. Patients with relapse of disease were positive in 70% of cases for HPV16 and 37,5% for mutation of PIK3CA. Conclusions: KRAS and BRAF genes were wild type in 100% of cases. This study demonstrates that the SCAC could potentially respond to an anti-EGFR drug.The mutation of PIK3CA does not seem to be predictive for response to treatment. Positivity for HPV16 seems predictive for PFS and overall survival. Furthermore, the study shows that PIK3CA mutation may contribute to carcinogenesis in some cases of this tumor. In addition, patients with a mutation of PI3K could have benefit from specific drugs that inhibit this kinase.

Introduction. Intraductal papillary mucinous neoplasm (IPMN) is the most common cystic precancerous lesion of pancreatic cancer (PDA). IPMNs can progress from low to high-grade dysplasia, to invasive PDAC, but exact data regarding cancer risks are limited. PDAC is the fourth leading cause of cancer death . The overall 5-year survival is 6%, but survival of patients with early stage PDAC is significantly better. AIM We used an approach coupling high resolution cytogenetic analysis (Affymetrix Oncoscan FFPE Array) with a clinically-oriented bioinformatic interpretation of data to understand what are the most relevant pathways altered in precursor lesions. Materials and methods High resolution cytogenetic analysis was performed in 20 formalin fixed paraffin embedded samples of IPMNs by Oncoscan FFPE assay. Genomic data were analyzed for copy number gains and losses, loss of heterozygosity and for a panel of recurrent somatic mutations. Results were validated by qPCR and FISH analysis. Results Twenty samples, including 14 mixed-type IPMNs (70%), 4 branch-duct IPMNs (20%) and 2 main-duct IPMNs (10%), were collected. We identified micro-invasive carcinoma (< 1 mm) and invasive carcinoma in 25% and in 10% of IPMNs respectively. By our high resolution cytogenetic analysis we observed that 8 IPMNs (40%) presented a nearly normal karyotype (< 4 copy number alterations), while 12 IPMNs (60%) showed a complex karyotype (> 10 alterations). In the latter subgroup were detected specific copy number gains of TERC and c-MYC oncogenes. Interestingly we noticed that TERC and c-MYC overexpression, present in 92% and 45% of complex karyotype samples respectively, were only observed in high-grade IPMNs, suggesting a possible role in a progression to malignancy. Oncoscan data were confirmed by Real Time and FISH analysis. Conclusions Those results suggest a role of TERC and c-MYC overexpression as a possible biomarkers in the early identification of patients with complex karyotype IPMNs in order to better stratification of cystic lesions that could require surgery