Dose-surface analysis for prediction of severe acute radio-induced skin toxicity in breast cancer patients

Francesco Pastore, Manuel Conson, Vittoria D’Avino, Giuseppe Palma, Raffaele Liuzzi, Raffaele Solla, Antonio Farella, Marco Salvatore, Laura Cella, Roberto Pacelli

Research output: Contribution to journalArticle

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Abstract

Background: Severe acute radiation-induced skin toxicity (RIST) after breast irradiation is a side effect impacting the quality of life in breast cancer (BC) patients. The aim of the present study was to develop normal tissue complication probability (NTCP) models of severe acute RIST in BC patients. Patients and methods: We evaluated 140 consecutive BC patients undergoing conventional three-dimensional conformal radiotherapy (3D-CRT) after breast conserving surgery in a prospective study assessing acute RIST. The acute RIST was classified according to the RTOG scoring system. Dose-surface histograms (DSHs) of the body structure in the breast region were extracted as representative of skin irradiation. Patient, disease, and treatment-related characteristics were analyzed along with DSHs. NTCP modeling by Lyman-Kutcher-Burman (LKB) and by multivariate logistic regression using bootstrap resampling techniques was performed. Models were evaluated by Spearman’s Rs coefficient and ROC area. Results: By the end of radiotherapy, 139 (99%) patients developed any degree of acute RIST. G3 RIST was found in 11 of 140 (8%) patients. Mild-moderate (G1-G2) RIST was still present at 40 days after treatment in six (4%) patients. Using DSHs for LKB modeling of acute RIST severity (RTOG G3 vs. G0-2), parameter estimates were TD50=39 Gy, n=0.38 and m=0.14 [Rs = 0.25, area under the curve (AUC) = 0.77, p = 0.003]. On multivariate analysis, the most predictive model of acute RIST severity was a two-variable model including the skin receiving ≥30 Gy (S30) and psoriasis [Rs = 0.32, AUC = 0.84, p 30 and a pre-existing skin disease (psoriasis) as a clinical factor.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalActa Oncologica
DOIs
Publication statusAccepted/In press - Nov 30 2015

Fingerprint

Radio
Breast Neoplasms
Skin
Radiation
Psoriasis
Area Under Curve
Breast
Conformal Radiotherapy
Preexisting Condition Coverage
Segmental Mastectomy
Skin Diseases
Radiotherapy
Multivariate Analysis
Logistic Models
Quality of Life
Prospective Studies

ASJC Scopus subject areas

  • Oncology
  • Radiology Nuclear Medicine and imaging
  • Hematology

Cite this

Pastore, F., Conson, M., D’Avino, V., Palma, G., Liuzzi, R., Solla, R., ... Pacelli, R. (Accepted/In press). Dose-surface analysis for prediction of severe acute radio-induced skin toxicity in breast cancer patients. Acta Oncologica, 1-8. https://doi.org/10.3109/0284186X.2015.1110253

Dose-surface analysis for prediction of severe acute radio-induced skin toxicity in breast cancer patients. / Pastore, Francesco; Conson, Manuel; D’Avino, Vittoria; Palma, Giuseppe; Liuzzi, Raffaele; Solla, Raffaele; Farella, Antonio; Salvatore, Marco; Cella, Laura; Pacelli, Roberto.

In: Acta Oncologica, 30.11.2015, p. 1-8.

Research output: Contribution to journalArticle

Pastore, F, Conson, M, D’Avino, V, Palma, G, Liuzzi, R, Solla, R, Farella, A, Salvatore, M, Cella, L & Pacelli, R 2015, 'Dose-surface analysis for prediction of severe acute radio-induced skin toxicity in breast cancer patients', Acta Oncologica, pp. 1-8. https://doi.org/10.3109/0284186X.2015.1110253
Pastore, Francesco ; Conson, Manuel ; D’Avino, Vittoria ; Palma, Giuseppe ; Liuzzi, Raffaele ; Solla, Raffaele ; Farella, Antonio ; Salvatore, Marco ; Cella, Laura ; Pacelli, Roberto. / Dose-surface analysis for prediction of severe acute radio-induced skin toxicity in breast cancer patients. In: Acta Oncologica. 2015 ; pp. 1-8.
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abstract = "Background: Severe acute radiation-induced skin toxicity (RIST) after breast irradiation is a side effect impacting the quality of life in breast cancer (BC) patients. The aim of the present study was to develop normal tissue complication probability (NTCP) models of severe acute RIST in BC patients. Patients and methods: We evaluated 140 consecutive BC patients undergoing conventional three-dimensional conformal radiotherapy (3D-CRT) after breast conserving surgery in a prospective study assessing acute RIST. The acute RIST was classified according to the RTOG scoring system. Dose-surface histograms (DSHs) of the body structure in the breast region were extracted as representative of skin irradiation. Patient, disease, and treatment-related characteristics were analyzed along with DSHs. NTCP modeling by Lyman-Kutcher-Burman (LKB) and by multivariate logistic regression using bootstrap resampling techniques was performed. Models were evaluated by Spearman’s Rs coefficient and ROC area. Results: By the end of radiotherapy, 139 (99{\%}) patients developed any degree of acute RIST. G3 RIST was found in 11 of 140 (8{\%}) patients. Mild-moderate (G1-G2) RIST was still present at 40 days after treatment in six (4{\%}) patients. Using DSHs for LKB modeling of acute RIST severity (RTOG G3 vs. G0-2), parameter estimates were TD50=39 Gy, n=0.38 and m=0.14 [Rs = 0.25, area under the curve (AUC) = 0.77, p = 0.003]. On multivariate analysis, the most predictive model of acute RIST severity was a two-variable model including the skin receiving ≥30 Gy (S30) and psoriasis [Rs = 0.32, AUC = 0.84, p 30 and a pre-existing skin disease (psoriasis) as a clinical factor.",
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AU - Liuzzi, Raffaele

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AU - Farella, Antonio

AU - Salvatore, Marco

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