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2. Ultimate periodicity problem for linear numeration systems

Author

Charlier, E., Massuir, A., Rigo, M., and Rowland, E.

Subjects
Computer Science - Discrete Mathematics, Mathematics - Combinatorics, Mathematics - Number Theory, 68Q45, 11U05, 11B85, 11S85, F.4.3, G.2.1
Abstract

We address the following decision problem. Given a numeration system $U$ and a $U$-recognizable set $X\subseteq\mathbb{N}$, i.e. the set of its greedy $U$-representations is recognized by a finite automaton, decide whether or not $X$ is ultimately periodic. We prove that this problem is decidable for a large class of numeration systems built on linearly recurrent sequences. Based on arithmetical considerations about the recurrence equation and on $p$-adic methods, the DFA given as input provides a bound on the admissible periods to test., Comment: 39 pages, 2 figures. This is an improved version of the original submission. It clarifies some arguments taking into account several comments from reviews

Published
2020
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3. Stereotactic radiotherapy for managing ovarian cancer oligoprogression under poly (ADP-ribose) polymerase inhibitors (PARPi)

Author

Durante, S, Cuccia, F, Rigo, M, Caminiti, G, Mastroleo, F, Lazzari, R, Corrao, G, Caruso, G, Vigorito, S, Cattani, F, Ferrera, G, Chiantera, V, Alongi, F, Colombo, N, Jereczek-Fossa, B, Durante S., Cuccia F., Rigo M., Caminiti G., Mastroleo F., Lazzari R., Corrao G., Caruso G., Vigorito S., Cattani F., Ferrera G., Chiantera V., Alongi F., Colombo N., Jereczek-Fossa B. A., Durante, S, Cuccia, F, Rigo, M, Caminiti, G, Mastroleo, F, Lazzari, R, Corrao, G, Caruso, G, Vigorito, S, Cattani, F, Ferrera, G, Chiantera, V, Alongi, F, Colombo, N, Jereczek-Fossa, B, Durante S., Cuccia F., Rigo M., Caminiti G., Mastroleo F., Lazzari R., Corrao G., Caruso G., Vigorito S., Cattani F., Ferrera G., Chiantera V., Alongi F., Colombo N., and Jereczek-Fossa B. A.

Abstract

Objective: Poly (ADP-ribose) polymerase inhibitors (PARPi) have become a new standard of care for the maintenance treatment of advanced epithelial ovarian cancer. This study aims to evaluate the efficacy and safety of combining stereotactic body radiotherapy with PARPi continuation as a strategy to treat ovarian cancer oligoprogression on PARPi. Methods: This is a multicenter retrospective study including ovarian cancer patients treated with stereotactic body radiotherapy and PARPi continuation for oligoprogression under PARPi maintenance therapy between June 2012 and May 2023 in three Italian centers. PARPi treatment was continued until further disease progression or unacceptable toxicity. The primary endpoint was the next-line systemic therapy-free interval. The Kaplan-Meier method was used to assess local control, progression-free survival, and overall survival. Univariate and multivariate Cox regression analyses were performed to evaluate potential clinical outcomes predictors. Results: 46 patients were included, with a total of 89 lesions treated over 63 radiotherapy treatments. Lymph nodes were the most frequently treated lesions (80, 89.9%), followed by visceral lesions (8, 9%) and one case with a bone lesion (1.1%). Median follow-up was 25.9 months (range 2.8-122). The median next-line systemic therapy-free interval was 12.4 months (95% CI 8.3 to 19.5). A number of prior chemotherapy lines greater than five was significantly associated with a reduced next-line systemic therapy-free interval (HR 3.21, 95% CI 1.11 to 9.32, p=0.032). At the time of analysis, 32 (69.6%) patients started a new systemic therapy regimen, while 14 (30.4%) remained on the PARPi regimen. The 2-year progression-free survival, local failure-free survival, and overall survival rates were 10.7%, 78.1%, and 76.5%, respectively. Four patients (8.7%) experienced acute toxicity with G1 gastrointestinal events. Conclusion: Stereotactic body radiotherapy combined with PARPi continuation may be

Published
2024

5. Hypofractionated Postoperative Radiotherapy in Prostate Cancer with Ialuril Soft Gels®: Toxicity and Efficacy Analysis on a Retrospective Series of 305 Patients

Author

Nicosia L, Vitale C, Cuccia F, Figlia V, Giaj-Levra N, Mazzola R, Ricchetti F, Rigo M, Ruggieri R, Cavalleri S, and Alongi F

Subjects
prostate cancer, hyaluronic acid, postoperative radiotherapy, salvage radiotherapy, hypofractionation, toxicity, Neoplasms. Tumors. Oncology. Including cancer and carcinogens, RC254-282
Abstract

Luca Nicosia,1 Claudio Vitale,1 Francesco Cuccia,1 Vanessa Figlia,1 Niccolò Giaj-Levra,1 Rosario Mazzola,1 Francesco Ricchetti,1 Michele Rigo,1 Ruggero Ruggieri,1 Stefano Cavalleri,2 Filippo Alongi1,3 1Advanced Radiation Oncology Department, IRCCS Sacro Cuore Don Calabria Hospital, Cancer Care Center, Verona, Negrar, Italy; 2Urology Division, IRCCS Sacro Cuore Don Calabria Hospital, Verona, Negrar, Italy; 3University of Brescia, Brescia, ItalyCorrespondence: Luca Nicosia, Advanced Radiation Oncology Department, IRCCS Sacro Cuore Don Calabria Hospital, Cancer Care Center, via Don Sempreboni 5, 37034, Verona, Negrar, Italy, Tel +39 045-6014800, Fax +045-60148071, Email lucanicosia.rg@gmail.comAim: To evaluate the impact of Ialuril soft Gels® (HA) in reducing acute genito-urinary (GU) toxicity in patients treated with adjuvant or salvage radiotherapy for a prostate cancer relapse.Material and Methods: The data of 305 patients were retrospectively collected. One hundred and five patients underwent adjuvant radiotherapy (aRT), while 200 a salvage treatment (sRT). GU toxicity was evaluated according to CTCAE v5.0. Every patient received RT combined with HA.Results: Grade 1– 2 GU toxicity during RT was represented by: urgency (36%), dysuria (23%), increased urinary frequency (12.1%), and urinary retention (11.8%). Nevertheless, the majority of symptoms were present at the baseline. Grade 3 severe toxicity was represented by 10 (3.2%) cases of incontinence and 3 (1%) cases of urgency. The incidence of any-grade RT-related GU toxicity was significantly higher in the aRT group than the salvage group (esRT + sRT) (83.8% versus 64.5%). When comparing the incidence of any-grade RT-related GU toxicity in the aRT, esRT, and sRT groups we observed a significant correlation favoring sRT, over esRT, and aRT.Conclusion: Postoperative hypofractionated radiotherapy is safe and not correlated with increase of unexpected toxicity when administered with oral hyaluronic acid. A prospective study is necessary to confirm these results.Keywords: prostate cancer, hyaluronic acid, postoperative radiotherapy, salvage radiotherapy, hypofractionation, toxicity

Published
2022

11. Aktuelle Forschung über betriebliche Präventionspraxis zum Schutz und zur Förderung mentaler Gesundheit

Author

Wahrendorf, M, Beck, D, Riedel-Heller, SG, Rigo, M, Lunau, T, Sommer, S, Schroeder, U, Stegmann, R, Wegewitz, U, Heming, M, Guendel, H, Weber, J, Hansmann, M, Herold, R, Angerer, P, Wahrendorf, M, Beck, D, Riedel-Heller, SG, Rigo, M, Lunau, T, Sommer, S, Schroeder, U, Stegmann, R, Wegewitz, U, Heming, M, Guendel, H, Weber, J, Hansmann, M, Herold, R, and Angerer, P

Published
2024

12. Development of Prostate Bed Delineation Consensus Guidelines for Magnetic Resonance Image-Guided Radiotherapy and Assessment of Its Effect on Interobserver Variability

Author

MS Radiotherapie, Cancer, Sritharan, K, Akhiat, A, Cahill, D, Choi, S, Choudhury, A, Chung, P, Diaz, J, Dysager, L, Hall, W, Huddart, R, Kerkmeijer, L G W, Lawton, C, Mohajer, J, Murray, J, Nyborg, C J, Pos, F J, Rigo, M, Schytte, T, Sidhom, M, Sohaib, A, Tan, A, van der Voort van Zyp, J, Vesprini, D, Zelefsky, M J, Tree, A C, MS Radiotherapie, Cancer, Sritharan, K, Akhiat, A, Cahill, D, Choi, S, Choudhury, A, Chung, P, Diaz, J, Dysager, L, Hall, W, Huddart, R, Kerkmeijer, L G W, Lawton, C, Mohajer, J, Murray, J, Nyborg, C J, Pos, F J, Rigo, M, Schytte, T, Sidhom, M, Sohaib, A, Tan, A, van der Voort van Zyp, J, Vesprini, D, Zelefsky, M J, and Tree, A C

Published
2024

13. Avoiding 2-binomial squares and cubes

Author

Rao, M., Rigo, M., and Salimov, P.

Subjects
Computer Science - Formal Languages and Automata Theory, Mathematics - Combinatorics, 68R15
Abstract

Two finite words $u,v$ are 2-binomially equivalent if, for all words $x$ of length at most 2, the number of occurrences of $x$ as a (scattered) subword of $u$ is equal to the number of occurrences of $x$ in $v$. This notion is a refinement of the usual abelian equivalence. A 2-binomial square is a word $uv$ where $u$ and $v$ are 2-binomially equivalent. In this paper, considering pure morphic words, we prove that 2-binomial squares (resp. cubes) are avoidable over a 3-letter (resp. 2-letter) alphabet. The sizes of the alphabets are optimal.

Published
2013

14. A Decision Problem for Ultimately Periodic Sets in Non-standard Numeration Systems

Author

Bell, J., Charlier, E., Fraenkel, A. S., and Rigo, M.

Subjects
Computer Science - Formal Languages and Automata Theory, Computer Science - Discrete Mathematics
Abstract

Consider a non-standard numeration system like the one built over the Fibonacci sequence where nonnegative integers are represented by words over $\{0,1\}$ without two consecutive 1. Given a set $X$ of integers such that the language of their greedy representations in this system is accepted by a finite automaton, we consider the problem of deciding whether or not $X$ is a finite union of arithmetic progressions. We obtain a decision procedure for this problem, under some hypothesis about the considered numeration system. In a second part, we obtain an analogous decision result for a particular class of abstract numeration systems built on an infinite regular language.

Published
2009

15. A note on syndeticity, recognizable sets and Cobham's theorem

Author

Rigo, M. and Waxweiler, L.

Subjects
Computer Science - Formal Languages and Automata Theory
Abstract

In this note, we give an alternative proof of the following result. Let p, q >= 2 be two multiplicatively independent integers. If an infinite set of integers is both p- and q-recognizable, then it is syndetic. Notice that this result is needed in the classical proof of the celebrated Cobham?s theorem. Therefore the aim of this paper is to complete [13] and [1] to obtain an accessible proof of Cobham?s theorem.

Published
2009

19. Real numbers having ultimately periodic representations in abstract numeration systems

Author

Lecomte, P. and Rigo, M.

Subjects
Computer Science - Computational Complexity, Computer Science - Computation and Language, F.4.1, F.4.3
Abstract

Using a genealogically ordered infinite regular language, we know how to represent an interval of R. Numbers having an ultimately periodic representation play a special role in classical numeration systems. The aim of this paper is to characterize the numbers having an ultimately periodic representation in generalized systems built on a regular language. The syntactical properties of these words are also investigated. Finally, we show the equivalence of the classical "theta"-expansions with our generalized representations in some special case related to a Pisot number "theta"., Comment: 22 pages, 10 figures

Published
2002

20. Continuous stochastic Schrodinger equations and localization

Author

Rigo, M., Mota-Furtado, F., and O'Mahony, P. F.

Subjects
Quantum Physics
Abstract

The set of continuous norm-preserving stochastic Schrodinger equations associated with the Lindblad master equation is introduced. This set is used to describe the localization properties of the state vector toward eigenstates of the environment operator. Particular focus is placed on determining the stochastic equation which exhibits the highest rate of localization for wide open systems. An equation having such a property is proposed in the case of a single non-hermitian environment operator. This result is relevant to numerical simulations of quantum trajectories where localization properties are used to reduce the number of basis states needed to represent the system state, and thereby increase the speed of calculation., Comment: 18 pages in LaTeX + 6 figures (postscript), uses ioplppt.sty. To appear in J. Phys. A

Published
1997
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21. The Quantum state diffusion model and the driven damped nonlinear oscillator

Author

Rigo, M., Alber, G., Mota-Furtado, F., and O'Mahony, P. F.

Subjects
Quantum Physics
Abstract

We consider a driven damped anharmonic oscillator which classically leads to a bistable steady state and to hysteresis. The quantum counterpart for this system has an exact analytical solution in the steady state which does not display any bistability or hysteresis. We use quantum state diffusion theory to describe this system and to provide a new perspective on the lack of hysteresis in the quantum regime so as to study in detail the quantum to classical transition. The analysis is also relevant to measurements of a single periodically driven electron in a Penning trap where hysteresis has been observed., Comment: 7 pages in RevTeX + 6 figures (postscript). To appear in Physical Review A

Published
1996
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22. From quantum trajectories to classical orbits

Author

Brun, T. A., Gisin, N., O'Mahony, P. F., and Rigo, M.

Subjects
Quantum Physics
Abstract

Recently it has been shown that the evolution of open quantum systems may be ``unraveled'' into individual ``trajectories,'' providing powerful numerical and conceptual tools. In this letter we use quantum trajectories to study mesoscopic systems and their classical limit. We show that in this limit, Quantum Jump (QJ) trajectories approach a diffusive limit very similar to the Quantum State Diffusion (QSD) unraveling. The latter follows classical trajectories in the classical limit. Hence, both unravelings show the rise of classical orbits. This is true for both regular and chaotic systems (which exhibit strange attractors)., Comment: 7 pages RevTeX 3.0 + 2 figures (postscript). Submitted to Physical Review Letters

Published
1996
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23. A multicenter LArge retrospectIve daTabase on the personalization of stereotactic ABlative radiotherapy use in lung metastases from colon-rectal cancer: The LaIT-SABR study

Author

Nicosia, L, Franceschini, D, Perrone-Congedi, F, Casamassima, F, Gerardi, M, Rigo, M, Mazzola, R, Perna, M, Scotti, V, Fodor, A, Iurato, A, Pasqualetti, F, Gadducci, G, Chiesa, S, Niespolo, R, Bruni, A, Alicino, G, Frassinelli, L, Borghetti, P, Di Marzo, A, Ravasio, A, De Bari, B, Sepulcri, M, Aiello, D, Mortellaro, G, Sangalli, C, Franceschini, M, Montesi, G, Aquilanti, F, Lunardi, G, Valdagni, R, Fazio, I, Scarzello, G, Corti, L, Vavassori, V, Maranzano, E, Magrini, S, Arcangeli, S, Gambacorta, M, Valentini, V, Paiar, F, Ramella, S, Di Muzio, N, Livi, L, Jereczek-Fossa, B, Osti, M, Scorsetti, M, Alongi, F, Nicosia L., Franceschini D., Perrone-Congedi F., Casamassima F., Gerardi M. A., Rigo M., Mazzola R., Perna M., Scotti V., Fodor A., Iurato A., Pasqualetti F., Gadducci G., Chiesa S., Niespolo R. M., Bruni A., Alicino G., Frassinelli L., Borghetti P., Di Marzo A., Ravasio A., De Bari B., Sepulcri M., Aiello D., Mortellaro G., Sangalli C., Franceschini M., Montesi G., Aquilanti F. M., Lunardi G., Valdagni R., Fazio I., Scarzello G., Corti L., Vavassori V., Maranzano E., Magrini S. M., Arcangeli S., Gambacorta M. A., Valentini V., Paiar F., Ramella S., Di Muzio N. G., Livi L., Jereczek-Fossa B. A., Osti M. F., Scorsetti M., Alongi F., Nicosia, L, Franceschini, D, Perrone-Congedi, F, Casamassima, F, Gerardi, M, Rigo, M, Mazzola, R, Perna, M, Scotti, V, Fodor, A, Iurato, A, Pasqualetti, F, Gadducci, G, Chiesa, S, Niespolo, R, Bruni, A, Alicino, G, Frassinelli, L, Borghetti, P, Di Marzo, A, Ravasio, A, De Bari, B, Sepulcri, M, Aiello, D, Mortellaro, G, Sangalli, C, Franceschini, M, Montesi, G, Aquilanti, F, Lunardi, G, Valdagni, R, Fazio, I, Scarzello, G, Corti, L, Vavassori, V, Maranzano, E, Magrini, S, Arcangeli, S, Gambacorta, M, Valentini, V, Paiar, F, Ramella, S, Di Muzio, N, Livi, L, Jereczek-Fossa, B, Osti, M, Scorsetti, M, Alongi, F, Nicosia L., Franceschini D., Perrone-Congedi F., Casamassima F., Gerardi M. A., Rigo M., Mazzola R., Perna M., Scotti V., Fodor A., Iurato A., Pasqualetti F., Gadducci G., Chiesa S., Niespolo R. M., Bruni A., Alicino G., Frassinelli L., Borghetti P., Di Marzo A., Ravasio A., De Bari B., Sepulcri M., Aiello D., Mortellaro G., Sangalli C., Franceschini M., Montesi G., Aquilanti F. M., Lunardi G., Valdagni R., Fazio I., Scarzello G., Corti L., Vavassori V., Maranzano E., Magrini S. M., Arcangeli S., Gambacorta M. A., Valentini V., Paiar F., Ramella S., Di Muzio N. G., Livi L., Jereczek-Fossa B. A., Osti M. F., Scorsetti M., and Alongi F.

Abstract

Introduction: Stereotactic ablative radiotherapy (SABR) has been shown to increase survival in oligometastatic disease, but local control of colorectal metastases remains poor. We aimed to identify potential predictive factors of SBRT response through a multicenter large retrospective database and to investigate the progression to the polymetastatic disease (PMD). Material and methods: The study involved 23 centers, and was approved by the Ethical Committee (Prot. Negrar 2019-ZT). 1033 lung metastases were reported. Clinical and biological parameters were evaluated as predictive for freedom from local progression-free survival (FLP). Secondary end-point was the time to the polymetastatic conversion (tPMC). Results: Two-year FLP was 75.4%. Two-year FLP for lesions treated with a BED < 00 Gy, 100–124 Gy, and ≥125 Gy was 76.1%, 70.6%, and 94% (p = 0.000). Two-year FLP for lesion measuring ≤10 mm, 10–20 mm, and >20 mm was 79.7%, 77.1%, and 66.6% (p = 0.027). At the multivariate analysis a BED ≥125 Gy significantly reduced the risk of local progression (HR 0.24, 95%CI 0.11–0.51; p = 0.000). Median tPMC was 26.8 months. Lesions treated with BED ≥125 Gy reported a significantly longer tPMC as compared to lower BED. The median tPMC for patients treated to 1, 2–3 or 4–5 simultaneous oligometastases was 28.5, 25.4, and 9.8 months (p = 0.035). Conclusion: The present is the largest series of lung colorectal metastases treated with SABR. The results support the use of SBRT in lung oligometastatic colorectal cancer patients as it might delay the transition to PMD or offer relatively long disease-free period in selected cases. Predictive factors were identified for treatment personalization.

Published
2022

33. End-Triassic Extinction in a Carbonate Platform From Western Tethys: A Comparison Between Extinction Trends and Geochemical Variations

Author

Todaro S.[1], Rigo M.[2, Di Stefano P.[1], Aiuppa A.[1], Chiaradia M.[4], Todaro S., Rigo M., Di Stefano P., Aiuppa A., and Chiaradia M.

Subjects
end Triassic extinction, large igneous province, Zn-Sr-Pb isotope, ddc:550, General Earth and Planetary Sciences, Triassic-Jurassic boundary, mass extinction, Sicily
Abstract

The Triassic/Jurassic boundary section cropping out at Mt Sparagio in north-western Sicily (Italy) consists of a thick and continuous peritidal succession typical of a Tethyan carbonate platform. The combined chemostratigraphic and biostratigraphic study of this section allowed us to parallel the environmental variations inferred by the isotopic records and the extinction trends recorded by the benthic organisms. In the studied section, the isotope data of C, O, and S are indicative of serious environmental perturbations related to the Central Atlantic Magmatic Province (CAMP) activity, as recorded worldwide. Two negative excursions in the C-curve (Initial-CIE and Main-CIE) confirm the acidification processes that affected the benthic community. Moreover, the oxygen isotopes curve indicates a strong warming-trend that corresponds to the reduction in biodiversity and size of the megalodontoids in the upper part of the Rhaetian beds, probably due to the deterioration of the photosymbiotic relationships of these pelecypods. We here present some novel isotope data (Zn, Pb, Sr) from the Mt Sparagio section that offer additional clues on a tight control of CAMP volcanism on the End-Triassic Extinction.

Published
2022
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34. Toxicity patterns and preliminary clinical outcomes of 1.5T MR-guided stereotactic body radiotherapy for prostate cancer

Author

Cuccia, F., primary, Figlia, V., additional, Rigo, M., additional, Mazzola, R., additional, Giaj Levra, N., additional, Nicosia, L., additional, Ricchetti, F., additional, Trapani, G., additional, Attinà, G., additional, Pastorello, E., additional, Vitale, C., additional, Ruggieri, R., additional, and Alongi, F., additional

Published
2022
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37. A Multicenter Large Retrospective Database on the Personalization of Stereotactic Ablative Radiotherapy for Lung Metastases From Colon-Rectal Cancer: The LaIT-SABR Study

Author

Nicosia, L, Franceschini, D, Perrone, F, Casamassima, F, Gerardi, M, Perna, M, Scotti, V, Fodor, A, Mazzola, R, Rigo, M, Iurato, A, Pasqualetti, F, Chiesa, S, Niespolo, R, Bruni, A, Frassinelli, L, Borghetti, P, Marzo, A, Ravasio, A, De Bari, B, Sepulcri, M, Aiello, D, Mortellaro, G, Sangalli, C, Franceschini, M, Montesi, G, Aquilanti, F, Valdagni, R, Fazio, I, Corti, L, Vavassori, L, Maranzano, E, Magrini, S, Lohr, F, Arcangeli, S, Valentini, V, Paiar, F, Ramella, S, Di Muzio, N, Livi, L, Jereczek-Fossa, B, Osti, M, Scorsetti, M, Alongi, F, Nicosia L., Franceschini D., Perrone F., Casamassima F., Gerardi M. A., Perna M., Scotti V., Fodor A., Mazzola R., Rigo M., Iurato A., Pasqualetti F., Chiesa S., Niespolo R. M., Bruni A., Frassinelli L., Borghetti P., Marzo A. D., Ravasio A., De Bari B., Sepulcri M., Aiello D., Mortellaro G., Sangalli C., Franceschini M., Montesi G., Aquilanti F. M., Valdagni R., Fazio I., Corti L., Vavassori L., Maranzano E., Magrini S., Lohr F., Arcangeli S., Valentini V., Paiar F., Ramella S., Di Muzio N. G., Livi L., Jereczek-Fossa B. A., Osti M. F., Scorsetti M., Alongi F., Nicosia, L, Franceschini, D, Perrone, F, Casamassima, F, Gerardi, M, Perna, M, Scotti, V, Fodor, A, Mazzola, R, Rigo, M, Iurato, A, Pasqualetti, F, Chiesa, S, Niespolo, R, Bruni, A, Frassinelli, L, Borghetti, P, Marzo, A, Ravasio, A, De Bari, B, Sepulcri, M, Aiello, D, Mortellaro, G, Sangalli, C, Franceschini, M, Montesi, G, Aquilanti, F, Valdagni, R, Fazio, I, Corti, L, Vavassori, L, Maranzano, E, Magrini, S, Lohr, F, Arcangeli, S, Valentini, V, Paiar, F, Ramella, S, Di Muzio, N, Livi, L, Jereczek-Fossa, B, Osti, M, Scorsetti, M, Alongi, F, Nicosia L., Franceschini D., Perrone F., Casamassima F., Gerardi M. A., Perna M., Scotti V., Fodor A., Mazzola R., Rigo M., Iurato A., Pasqualetti F., Chiesa S., Niespolo R. M., Bruni A., Frassinelli L., Borghetti P., Marzo A. D., Ravasio A., De Bari B., Sepulcri M., Aiello D., Mortellaro G., Sangalli C., Franceschini M., Montesi G., Aquilanti F. M., Valdagni R., Fazio I., Corti L., Vavassori L., Maranzano E., Magrini S., Lohr F., Arcangeli S., Valentini V., Paiar F., Ramella S., Di Muzio N. G., Livi L., Jereczek-Fossa B. A., Osti M. F., Scorsetti M., and Alongi F.

Abstract

PURPOSE/OBJECTIVE(S): stereotactic ablative radiotherapy (SABR) has been shown to increase survival rates in oligometastatic disease (OMD), but local control of colorectal metastases still remains poor. We aimed to identify potential predictive factors of SBRT response through a multicenter large retrospective database and to investigate how lung SBRT can impact on the progression to the polymetastatic disease (PMD). MATERIALS/METHODS: the study involved 22 centers, and was approved by the Ethical Committee (Prot. Negrar 2019-ZT). 1023 lung metastases treated with SBRT in 622 patients were reported. The median BED was 105 Gy10. Lesion diameter GTV, PTV volume, dose, fractionations, and site of primary tumor were evaluated as potential predictive marker for SBRT response for the primary end-point local progression-free survival (LPFS). EGFR, KRAS, NRAS, BRAF, and MSI were also evaluated. Secondary end-point was the time to the polymetastatic conversion (ttPMC). RESULTS: the median follow-up was 26 months (range 3-117 months). The median lesion diameter was 13 mm (range 4-58 mm). The 2- and 3-year LPFS were 75.6% and 71%, respectively. At the univariate analysis, BED ≥125Gy10 was associated with improved LPFS (2-year: 94.1% versus 72.6%; P = < 0.0001), single fraction SBRT correlated with better LPFS in the overall population (2-year: 80.6% versus 73.7%; P = 0.03), but no significant difference was observed when considering the population treated with BED > 100 Gy10. Lesion diameter ≤19 mm correlated with improved LPFS (2-year 80% versus 60%; P = < 0.0001). The median ttPMC was 26 months, and the 2-year ttPMC was 54.5%. The median PFS was 11.3 months. After SABR, 36% patients had polymetastatic relapse, 39.5% patients had an oligometastatic relapse, and 24.5% patients had no further relapse. CONCLUSION: the present is the largest series of lung colorectal metastases treated with SABR. The results support the use of SBRT in lung oligometastatic colorectal canc

Published
2021

39. PD-0571 Determining interobserver variability in prostate bed CTV target delineation using MRI

Author

Sritharan, K., primary, Akhiat, H., additional, Cahill, D., additional, Choi, S.L., additional, Choudhury, A., additional, Chung, P., additional, Diaz, J., additional, Dysager, L., additional, Hall, W., additional, Kerkmeijer, L., additional, Lawton, C.A., additional, Murray, J., additional, Nyborg, C.J., additional, Pos, F.J., additional, Rigo, M., additional, Schytte, T., additional, Sidhom, M., additional, Sohaib, A., additional, Tan, A., additional, van der Voort van Zyp, J., additional, Vesprini, D., additional, Zelefsky, M.J., additional, and Tree, A., additional

Published
2022
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40. PD-0250 Therapeutic use of Linac-based SRS in malignant spasticity: early results from a prospective trial

Author

Nicosia, L., primary, Avesani, R., additional, Rossato, E., additional, Ferrari, F., additional, Cuccia, F., additional, Figlia, V., additional, Giaj-Levra, N., additional, Mazzola, R., additional, Ricchetti, F., additional, Rigo, M., additional, Attinà, G., additional, Vitale, C., additional, Marchioretto, F., additional, Zamperini, M., additional, De Simone, A., additional, Ruggeri, R., additional, and Alongi, F., additional

Published
2022
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41. PO-1452 Stereotactic ablative radiotherapy in patients with refractory ventricular tachyarrhythmia

Author

Nicosia, L., primary, Giaj-Levra, N., additional, Sicignano, G., additional, Cuccia, F., additional, Figlia, V., additional, Mazzola, R., additional, Ricchetti, F., additional, Rigo, M., additional, Vitale, C., additional, Attinà, G., additional, De Simone, A., additional, Gurrera, D., additional, Ruggeri, R., additional, Molon, G., additional, and Alongi, F., additional

Published
2022
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43. OC-0602 A pREDictive model of polymetastatic disease on oligometastatic colorectal cancer: the RED LaIT-SABR

Author

Nicosia, L., primary, Franceschini, D., additional, Perrone Congedi, F., additional, Casamassima, F., additional, Gerardi, M.A., additional, Rigo, M., additional, Mazzola, R., additional, Perna, M., additional, Scotti, V., additional, Fodor, A., additional, Iurato, A., additional, Pasqualetti, F., additional, Gadducci, G., additional, Chiesa, S., additional, Niespolo, R.M., additional, Bruni, A., additional, Alicino, G., additional, Frassinelli, L., additional, Borghetti, P., additional, Di Marzo, A., additional, Ravasio, A., additional, De Bari, B., additional, Sepulcri, M., additional, Aiello, D., additional, Mortellaro, G., additional, Sangalli, C., additional, Franceschini, M., additional, Montesi, G., additional, Aquilanti, F.M., additional, Lunardi, G., additional, Valdagni, R., additional, Fazio, I., additional, Corti, L., additional, Vavassori, V., additional, Maranzano, E., additional, Magrini, S.M., additional, Arcangeli, S., additional, Valentini, V., additional, Paiar, F., additional, Ramella, S., additional, Di Muzio, N.G., additional, Livi, L., additional, Jereczek- Fossa, B.A., additional, Osti, M.F., additional, Scorsetti, M., additional, and Alongi, F., additional

Published
2022
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44. PD-0086 PSMA-PET guided stereotactic body radiotherapy for bone oligorecurrent prostate cancer

Author

Cuccia, F., primary, Mazzola, R., additional, Pastorello, E., additional, Ingrosso, G., additional, Franzese, C., additional, Scorsetti, M., additional, Figlia, V., additional, Giaj-Levra, N., additional, Nicosia, L., additional, Rigo, M., additional, Ricchetti, F., additional, Vitale, C., additional, Attinà, G., additional, Ruggieri, R., additional, and Alongi, F., additional

Published
2022
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49. PD-0575 Toxicity and QoL report of 1.5T MR-guided SBRT for prostate cancer in the first 100 patients

Author

Cuccia, F., primary, Figlia, V., additional, Rigo, M., additional, Nicosia, L., additional, Mazzola, R., additional, Giaj-Levra, N., additional, Ricchetti, F., additional, Attinà, G., additional, Pastorello, E., additional, Vitale, C., additional, De Simone, A., additional, Gurrera, D., additional, Naccarato, S., additional, Sicignano, G., additional, Ruggieri, R., additional, and Alongi, F., additional

Published
2022
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50. Terrestrial record of carbon-isotope shifts across the Norian/Rhaetian boundary: A high-resolution study from northwestern Sichuan Basin, South China

Author

Jin X.[1], Ogg J.G.[1, Lu S.[3], Shi Z.[1], Kemp D.B.[4], Hua X.[4], Onoue T.[5], and Rigo M.[6

Subjects
Global and Planetary Change, Large Igneous Provinces, Late Triassic, Mercury, Wildfires, Oceanography, wildfires, mercury, large igneous provinces
Abstract

A series of biotic crises and turnovers have been recorded at the Norian/Rhaetian boundary (NRB), together with a putative perturbation to the global carbon cycle in the form of one or more negative carbon-isotope shifts. Despite this evidence, the full validation of Norian/Rhaetian climate changes has not been possible. In particular, no clear record of Norian/Rhaetian environmental change has yet been recovered from a terrestrial setting. The eruption of the Angayucham Large Igneous Province has been considered as a possible cause for the putative NRB negative carbon-isotope shifts. Hg as a volcanism proxy has been well-studied in many ancient marine and terrestrial sediments, but to date no Hg record has been obtained across the NRB. In this study, we focus on a terrestrial Norian-Rhaetian section (Xujiahe section) located north of Guangyuan in the northwestern Sichuan Basin, which has been correlated to the NRB using cyclostratigraphy and magnetostratigraphy. A long-lived negative trend in delta13Corg, superimposed with four negative shifts, is recognized across the NRB interval. This can be correlated to the uppermost part of the third negative delta 13Corg shift (named S3) recognized in profiles from marine sites in Europe. Contemporaneous Hg concentration, Hg/Al and Hg/TOC anomalies in the Xujiahe section were possibly caused by large-scale volcanic activity. The large amplitude changes in delta 13Corg (ca. - 5.2%o) that we observe are suggested to be associated with local wildfire and enhanced coarse sediment input, indicating a significant environmental change during the NRB interval. Similar paleoclimatic perturbations have been noted across other extinction events (e.g., end-Permian mass extinction event) as a result of the emplacement of large igneous provinces, or because of felsic volcanism.

Published
2022

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