Shinsuke Sasada1, Norio Masumoto2, Eri Suzuki2, Satoshi Sueoka2, Noriko Goda2, Keiko Kajitani2, Akiko Emi2, Takayuki Kadoya2, Morihito Okada2. 1. Department of Surgical Oncology, Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami-Ku, Hiroshima City, Hiroshima, 734-8551, Japan. shsasada@hiroshima-u.ac.jp. 2. Department of Surgical Oncology, Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami-Ku, Hiroshima City, Hiroshima, 734-8551, Japan.
Abstract
PURPOSE: The aim of this study was to assess whether the retention index (RI) determined using dual-phase 18F-fluorodeoxyglucose positron emission tomography/computed tomography (FDG PET/CT) reflects the malignant features of breast cancer. METHODS: A total of 1,523 patients with breast cancer were retrospectively evaluated. PET/CT scans were performed at 1 h and 2 h after FDG administration before treatment. The maximum standardized uptake value (SUVmax) at both time points (SUVmax1 and SUVmax2) in the primary tumour and RI were calculated. Primary tumour tissues were evaluated in terms of biological features, such as histology, nuclear grade, lymphovascular invasion and molecular subtype. RESULTS: Of the 1,523 patients, 463 (30.4%) had luminal A-like, 661 (43.4%) had luminal B-like, 229 (15.0%) had human epidermal growth factor receptor 2-positive (HER2-positive), and 157 (10.3%) triple-negative breast cancer. The median SUVmax1, SUVmax2 and RI values were 2.2, 2.3 and 2.6%, respectively. These metabolic parameters were correlated with tumour size, nodal metastasis, histology, nuclear grade, lymphovascular invasion, and molecular subtype (all P < 0.001). The median RI values were 0% in luminal A-like, 5.3% in luminal B-like, 6.9% in HER2-positive, and 11.4% in triple-negative breast cancer. RI was associated with malignant features when the tumour accumulated a significant amount of FDG. In a subanalysis of patients with tumours of stages T2 to T4, RI was correlated with nodal metastasis, histology, nuclear grade, and molecular subtype (luminal A-like 4.8%, luminal B-like 12.3%, HER2-positive 15.8%, and triple-negative 16.3%). CONCLUSION: RI determined using delayed-phase FDG PET/CT is associated with malignant features in breast cancers with significant FDG uptake. Dual-phase imaging was helpful in distinguishing luminal A-like breast cancer from luminal B-like, HER2-positive, and triple-negative breast cancers.
PURPOSE: The aim of this study was to assess whether the retention index (RI) determined using dual-phase 18F-fluorodeoxyglucose positron emission tomography/computed tomography (FDG PET/CT) reflects the malignant features of breast cancer. METHODS: A total of 1,523 patients with breast cancer were retrospectively evaluated. PET/CT scans were performed at 1 h and 2 h after FDG administration before treatment. The maximum standardized uptake value (SUVmax) at both time points (SUVmax1 and SUVmax2) in the primary tumour and RI were calculated. Primary tumour tissues were evaluated in terms of biological features, such as histology, nuclear grade, lymphovascular invasion and molecular subtype. RESULTS: Of the 1,523 patients, 463 (30.4%) had luminal A-like, 661 (43.4%) had luminal B-like, 229 (15.0%) had humanepidermal growth factor receptor 2-positive (HER2-positive), and 157 (10.3%) triple-negative breast cancer. The median SUVmax1, SUVmax2 and RI values were 2.2, 2.3 and 2.6%, respectively. These metabolic parameters were correlated with tumour size, nodal metastasis, histology, nuclear grade, lymphovascular invasion, and molecular subtype (all P < 0.001). The median RI values were 0% in luminal A-like, 5.3% in luminal B-like, 6.9% in HER2-positive, and 11.4% in triple-negative breast cancer. RI was associated with malignant features when the tumour accumulated a significant amount of FDG. In a subanalysis of patients with tumours of stages T2 to T4, RI was correlated with nodal metastasis, histology, nuclear grade, and molecular subtype (luminal A-like 4.8%, luminal B-like 12.3%, HER2-positive 15.8%, and triple-negative 16.3%). CONCLUSION: RI determined using delayed-phase FDG PET/CT is associated with malignant features in breast cancers with significant FDG uptake. Dual-phase imaging was helpful in distinguishing luminal A-like breast cancer from luminal B-like, HER2-positive, and triple-negative breast cancers.
Entities:
Keywords:
Breast cancer; Dual-phase; FDG; PET; Retention index
Authors: Ana María García Vicente; Ángel Soriano Castrejón; Fernanda Relea Calatayud; Azahara Palomar Muñoz; Antonio Alberto León Martín; Ignacio Chacón López-Muñiz; María Del Mar Muñoz Sánchez; José Manuel Cordero García; Edward Mitsuro Becerra Nakayo Journal: Clin Nucl Med Date: 2012-05 Impact factor: 7.794
Authors: A M García Vicente; A Soriano Castrejón; F Relea Calatayud; V Muñoz Madero; M J Molina Garrido; A A León Martín; J M Cordero García; J P Pilkington Woll; I Chacón López-Muñiz; A Palomar Muñoz Journal: Rev Esp Med Nucl Imagen Mol Date: 2012-03-19 Impact factor: 1.359