A.M. García Vicente

Hospital General Universitario de Ciudad Real, Ciudad Real, Castille-La Mancha, Spain

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Publications (117)107.34 Total impact

  • No preview · Article · Nov 2015
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    ABSTRACT: Purpose: To explore the relation between tumor kinetic assessed by (18)F-FDG PET and final neoadjuvant chemotherapy (NC) response within a molecular phenotype perspective. Material and methods: Prospective study included 144 women with breast cancer. All patients underwent a dual-time point (18)F-FDG PET/CT previous to NC. The retention index (RI), between SUV-1 and SUV-2 was calculated. Molecular subtypes were re-grouped in low, intermediate and high-risk biological phenotypes. After NC, all residual primary tumor specimens were histopathologically classified in tumor regression grades (TRG) and response groups. The relation between SUV-1, SUV-2 and RI with the TRG and response groups was evaluated in all molecular subtypes and in accordance with the risk categories. Results: Responder's lesions showed significant greater SUVmax compared to non-responders. The RI value did not show any significant relation with response. Attending to molecular phenotypes, statistical differences were observed with greater SUV for responders having high-risk molecular subtypes. Conclusion: Glycolytic tumor characteristics showed a significant correlation with NC response and dependence of risk phenotype.
    No preview · Article · Nov 2015
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    ABSTRACT: Aim: To explore the relationship between basal (18)F-FDG uptake in breast tumors and survival in patients with breast cancer (BC) using a molecular phenotype approach. Material and methods: This prospective and multicentre study included 193 women diagnosed with BC. All patients underwent an (18)F-FDG PET/CT prior to treatment. Maximum standardized uptake value (SUVmax) in tumor (T), lymph nodes (N), and the N/T index was obtained in all the cases. Metabolic stage was established. As regards biological prognostic parameters, tumors were classified into molecular sub-types and risk categories. Overall survival (OS) and disease free survival (DFS) were obtained. An analysis was performed on the relationship between semi-quantitative metabolic parameters with molecular phenotypes and risk categories. The effect of molecular sub-type and risk categories in prognosis was analyzed using Kaplan-Meier and univariate and multivariate tests. Results: Statistical differences were found in both SUVT and SUVN, according to the molecular sub-types and risk classifications, with higher semi-quantitative values in more biologically aggressive tumors. No statistical differences were observed with respect to the N/T index. Kaplan-Meier analysis revealed that risk categories were significantly related to DFS and OS. In the multivariate analysis, metabolic stage and risk phenotype showed a significant association with DFS. Conclusion: High-risk phenotype category showed a worst prognosis with respect to the other categories with higher SUVmax in primary tumor and lymph nodes.
    No preview · Article · Nov 2015
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    ABSTRACT: Objective: F-18 fluorodeoxyglucose integrated PET-CT scan is commonly used in the work-up of lung cancer to improve preoperative disease stage. The aim of the study was to analyze the ratio between SUVmax of N1 lymph nodes and primary lung cancer to establish prediction of mediastinal disease (N2) in patients operated on non-small cell lung cancer. Material and method: This is a retrospective study of a prospective database. Patients operated on non-small cell lung cancer (NSCLC) with N1 disease by PET-CT scan were included. None of them had previous induction treatment, but they underwent standard surgical resection plus systematic lymphadenectomy. Results: There were 51 patients with FDG-PET-CT scan N1 disease. 44 (86.3%) patients were male with a mean age of 64.1±10.8 years. Type of resection: pneumonectomy=4 (7.9%), lobectomy/bilobectomy=44 (86.2%), segmentectomy=3 (5.9%). Histology: adenocarcinoma=26 (51.0%), squamous=23 (45.1%), adenosquamous=2 (3.9%). Lymph nodes after surgical resection: N0=21 (41.2%), N1=12 (23.5%), N2=18 (35.3%). Mean ratio of the SUVmax of N1 lymph node to the SUVmax of the primary lung tumor (SUVmax N1/T ratio) was 0.60 (range 0.08-2.80). ROC curve analysis to obtain the optimal cut-off value of SUVmax N1/T ratio to predict N2 disease was performed. At multivariate analysis, we found that a ratio of 0.46 or greater was an independent predictor factor of N2 mediastinal lymph node metastases with a sensitivity and specificity of 77.8% and 69.7%, respectively. Conclusions: SUVmax N1/T ratio in NSCLC patients correlates with mediastinal lymph node metastasis (N2 disease) after surgical resection. When SUVmax N1/T ratio on integrated PET-CT scan is equal or superior to 0.46, special attention should be paid on higher probability of N2 disease.
    No preview · Article · Oct 2015
  • Ana María García Vicente · Víctor M Pérez-García · Ángel Soriano Castrejón

    No preview · Article · Sep 2015 · Journal of Thoracic Disease
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    ABSTRACT: To explore the relationship between basal (18) F-FDG PET/CT information in breast tumours and survival in locally advanced breast cancer (LABC). This prospective, multicentre study included 198 women diagnosed with LABC. All patients underwent (18) F-FDG PET/CT prior to treatment. The maximum standardized uptake value (SUVmax) in tumor (T), lymph nodes (N) and the N/T ratio was obtained in all cases. Stage according to PET/CT imaging (metabolic stage) and conventional imaging techniques (clinical stage) was established. During follow-up, patient status was established (disease free status or not). The relationship between all the variables and overall survival (OS) and disease-free survival (DFS) was analysed using the Kaplan-Meier and Cox regression methods. A ROC analysis was performed to obtain a cut-off value of SUVmax that was useful in the prediction of outcome. The mean SUVmax ± SD values in the primary tumour, lymph nodes and the SUVmax N/T index were 7.40 ± 5.57, 4.17 ± 4.74 and 0.73 ± 1.20, respectively. Higher semiquantitative metabolic values were found in more advanced metabolic and clinical stages. During follow-up, 78.4 % of patients were free of disease. Significant relationships were observed between SUVT and SUVN and patient status. With respect to OS and DFS, significant differences were detected for the metabolic stage. Kaplan-Meier analysis revealed that using the cut-off values, a primary-tumour SUVmax ≥ 6.05 or a nodal SUVmax ≥2.25 were significantly correlated with DFS and OS. PET imaging with (18) F-FDG offers prognostic information for LABC that can be obtained preoperatively and noninvasively.
    Full-text · Article · Jul 2015 · European Journal of Nuclear Medicine
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    ABSTRACT: 18F-FDG-PET-CT has showed its utility in the staging and the definition of the treatment volume in head and neck cancers with radiotherapy (RT) indication. Despite some uncertainties related to resolution and segmentation, PET/CT offers valuable information about tumor heterogeneity and biology. The technological advances in the radiotherapy setting as intensity-modulated RT, image-guided RT in the adaptive protocol and dose escalation are the future directions for the PET-CT especially for hypoxia or proliferation radiotracers.
    No preview · Article · Jul 2015

  • No preview · Article · Jun 2015 · Revista Española de Medicina Nuclear e Imagen Molecular
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    ABSTRACT: To compare the diagnostic performance of different metabolical, morphological and clinical criteria for correct presurgical classification of the solitary pulmonary nodule (SPN). Fifty-five patients, with SPN were retrospectively analyzed. All patients underwent preoperative (18)F-fluorodeoxyglucose (FDG)-positron emission tomography (PET)/computed tomography (CT). Maximum diameter in CT, maximum standard uptake value (SUVmax), histopathologic result, age, smoking history and gender were obtained. Different criteria were established to classify a SPN as malignant: (I) visually detectable metabolism, (II) SUVmax >2.5 regardless of SPN diameter, (III) SUVmax threshold depending of SPN diameter, and (IV) ratio SUVmax/diameter greater than 1. For each criterion, statistical diagnostic parameters were obtained. Receiver operating characteristic (ROC) analysis was performed to select the best diagnostic SUVmax and SUVmax/diameter cutoff. Additionally, a predictive model of malignancy of the SPN was derived by multivariate logistic regression. Fifteen SPN (27.3%) were benign and 40 (72.7%) malignant. The mean values ± standard deviation (SD) of SPN diameter and SUVmax were 1.93±0.57 cm and 3.93±2.67 respectively. Sensitivity (Se) and specificity (Sp) of the different diagnostic criteria were (I): 97.5% and 13.1%; (II) 67.5% and 53.3%; (III) 70% and 53.3%; and (IV) 85% and 33.3%, respectively. The SUVmax cut-off value with the best diagnostic performance was 1.95 (Se: 80%; Sp: 53.3%). The predictive model had a Se of 87.5% and Sp of 46.7%. The SUVmax was independent variables to predict malignancy. The assessment by semiquantitative methods did not improve the Se of visual analysis. The limited Sp was independent on the method used. However, the predictive model combining SUVmax and age was the best diagnostic approach.
    No preview · Article · Jun 2015
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    ABSTRACT: (99m)Tc-tetrofosmin single photon emission computed tomography ((99m)Tc-tetrofosmin SPECT) has an important role in the assessment of coronary artery disease. Despite being its main indication, this study does not only evaluate myocardial perfusion, but much more. Moreover, during the SPECT acquisition, the field area covered includes many important organs of the thorax and abdomen, so extracardiac abnormalities can be observed. The correct etiologic diagnosis of them is only possible if we understand how (99m)Tc-tetrofosmin works and make a comprehensive investigation of the clinical history of the patient. Copyright © 2015 Elsevier España, S.L.U. and SEMNIM. All rights reserved.
    No preview · Article · May 2015 · Revista Española de Medicina Nuclear e Imagen Molecular
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    ABSTRACT: This study aimed to determine the diagnostic impact of (18)F-FDG PET/CT based on the clinical features of paraneoplastic neurological syndrome (PNS). Multicenter retrospective and longitudinal study of patients with suspicion of PNS. The clinical picture was classified into classic (CS) and non-classic syndrome (NCS). After the follow-up, the definitive or possible diagnosis of PNS was established. The pictures that did not match any of the previous criteria were categorized as non-classifiable. The state of the onco-neural antibodies was studied. The PET/CT was classified as positive or negative for the detection of malignancy. The relationship between PET/CT findings and the final diagnosis was determined. The differences between variables (Pearson test X(2)) and the relationship between the results of the PET/CT and the final diagnosis were analyzed. A total of 64 patients were analyzed, classifying 30% as CS and 42% as NCS. After the follow-up, 20% and 16% of subjects were diagnosed as possible and definitive PNS, respectively. Positive onco-neural antibodies were found in 13% of the patients. A definitive diagnosis of PNS was associated with a positive PET/CT (P=.08). A significant relation between antibodies expression and final diagnosis of neoplasia (P=.04) was demonstrated. The PET/CT correctly localized malignancy in 5/7 cases of invasive cancer. The PET/CT showed a higher percentage of positive results in patients with definitive diagnosis of PNS. Despite the low prevalence of malignancy in our series, the PET/CT detected malignancy in a significant proportion of patients with invasive cancer. Copyright © 2014 Elsevier España, S.L.U. y SEMNIM. All rights reserved.
    No preview · Article · Apr 2015

  • No preview · Article · Jan 2015 · Revista Española de Medicina Nuclear e Imagen Molecular
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    ABSTRACT: The aim of our work was to determine the accuracy of 99mTc--HYNIC Tyr3 Octreotide scintigraphy (TcOS) in detecting active disease in neuroendocrine tumors (NETs) based on embryological origin of the primary tumor (foregut, midgut or hind gut). We analyzed retrospectively 45 studies (12 staging, 26 suspicion of recurrence, and 7 treatment response) belonging to 33 patients with histological confirmation of NETs. Whole body scan and a SPECT--CT were acquired 4 hours post--injection of 740 MBq of 99mTc-- HYNIC Tyr3 Octreotide. The studies were divided into 3 groups based on the embryological origin of primary tumor [foregut (group 1), midgut (group 2) and hindgut (group 3)]. The accuracy of TcOS in each group was assessed, included chi--square analyses. The final diagnosis was established by histopathology or clinical/radiological follow--up greater than 6 months. The localization of the primary tumor per patient revealed that 58% were from the foregut, 30% from the midgut and 12% from the hindgut. In study based analysis (45 studies), TcOS showed an overall sensitivity, specificity and accuracy of 95%, 92% and 93% respectively. The accuracy per studies for the group 1, 2 and 3 were: 100%, 92% and 66% respectively, demonstrating a better detection of active disease in primary tumors from foregut and midgut compared to hindgut (p: 0.02). The accuracy of TcOS in the assessment of NETs seems to be better in tumors with foregut and midgut origin, showing a possible relationship between the embryological origin of NETs and detection of active disease by TcOS.
    No preview · Article · Jan 2015 · Minerva endocrinologica
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    ABSTRACT: Objective This study evaluated the usefulness of 18F-fluorocholine PET/CT in restaging patients with a history of prostate adenocarcinoma who faced biochemical relapse after early radical treatment, and correlated the technique's disease detection rate with a set of variables and clinical and pathological parameters.Material and methodsThis was a retrospective multicentre study which included 374 patients referred for choline PET/CT who had biochemical relapse. In the end, 233 patients who met the following inclusion criteria were analysed: diagnosis of prostate cancer; early radical treatment; biochemical relapse; main clinical and pathological variables; and clinical, pathological and imaging data needed to validate the results. Criteria used to validate the PET/CT: findings from other imaging techniques, clinical follow-up, treatment response and histological analysis. Different statistical tests were used depending on the distribution of the data to correlate the results of the choline PET/CT with qualitative (T, N, early prostatectomy vs. other treatments, hormone therapy concomitant to choline PET/CT) and quantitative (age, Gleason score, PSA levels at diagnosis, PSA nadir, PSA on the day of the choline PET/CT or trigger PSA and PSADT) variables. We analysed whether there were independent predictive factors associated with the positive PET/CT result. All statistical tests were considered two-sided and significant values where p<0.05.ResultsThe choline PET/CT was positive in 111 of 233 patients (detection rate: 47.6%) and negative in 122 (52.4%). Disease locations: prostate or prostate bed in 26 patients (23.4%); regional and/or distant lymph nodes in 52 (46.8%); and metastatic bone disease in 33 (29.7%). Positive findings were validated by: results from other imaging techniques in 35 patients (15.0%); at least 6 months of clinical follow-up in 136 (58.4%); treatment response in 24 (10.3%); histological analysis of lesions in 17 (7.3%); and follow-up plus imaging results in 21 (9.0%). The statistical analysis of qualitative variables, corresponding to patients′ clinical characteristics, and the positive/negative final PET/CT results revealed that only whether or not early treatment with radical prostatectomy was done was statistically significant (p<0.001), with the number of positive results higher in patients who did not undergo a radical prostatectomy. Among the quantitative variables, Gleason score, trigger PSA and PSADT clearly differentiated the two patient groups (positive and negative choline PET/CT): p=0.010, p=0.001 and p=0.025, respectively. A Gleason score of <5 or ≥8 clearly differentiated positive from negative PET. Trigger PSA: mean of 8 ngr/ml for positive PET/CT vs. 2.8 for negative PET/CT; PSADT: mean of 8 months for positive PSADT and 12.6 for negative PSADT. The optimal cut-off points were: 3 ngr/ml for trigger PSA and 6 months for PSADT (Youden index/ROC curve). Analysing these two variables together showed that PSADT was more conclusive in patients with lower PSA Trigger. Analysing variables by location showed that only PSADT was able to differentiate between those with disease confined to the prostate compared with the other two locations (lymph nodes and bone), with shorter PSADT in these two, which was statistically significant (p<0.002). In the patient group with PSA of <1.5 ngr/ml, 30.8% had the disease, 7% of whom had metastatic bone disease. In the multivariate logistic regression, the risks factors that were clearly independent for those with positive PET/CT were: PSA >3 ngr/ml; no early prostatectomy; and Gleason score of ≥8.Conclusion Our results support the usefulness of 18F-fluorocholine PET/CT in biochemical relapse of prostate cancer after radical treatment, with an overall disease detection rate close to 50%, and it can be recommended as first-line treatment. As mentioned above, besides PSA levels on the day of the PET/CT, there are other clinical and pathological variables to consider in order to screen patients properly and thus minimise the number of nodular lesions and increase the diagnostic accuracy of the exam.
    Full-text · Article · Oct 2014 · BJU International
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    ABSTRACT: Objective: To assess the accuracy of FDG-PET/contrast enhanced CT (FDG-PET/ceCT) in the detection of unsuspected recurrence of colorectal cancer (CRC) in patients with high risk of relapse. Methods: Thirty-three patients (14 females and 19 males, mean age: 62, range: 41-78), with CRC in complete remission, were prospectively included. All patients underwent FDG-PET/ceCT (58 studies). FDG-PET/ceCT was requested in the surveillance setting, and performed following a standardized protocol. A portal venous phase CT scan was performed after the injection of iodinated contrast agent. An individual and combined assessment of both techniques (PET and ceCT) was performed. Concordant and discordant findings of PET, ceCT and FDG-PET/ceCT were compared in a patient-based and a lesion-based analysis. The final diagnosis, recurrence or disease free status (DFS), were established by histopathology or clinical/radiological follow-up of at least 6 months. Results: Seven out of 33 patients had a confirmed recurrence and the rest of patients had a DFS. In a patient-based analysis the sensitivity and specificity of PET, ceCT and PET/ceCT was of 86% and 88%, 86% and 92%, 86% and 85%, respectively. Attending to the lesion-based analysis, the sensitivity for PET, ceCT and PET/ceCT was of 56%, 71% and 97%, respectively. Both techniques showed a good concordance in the establishment of the final patient status. However, on a lesion-based analysis, no concordance was observed between them. Conclusion: PET and ceCT seem to have similar value in the detection of unsuspected recurrence of CRC in a patient-based analysis. However, the combined assessment of PET/ceCT improves the accuracy in the lesion-based analysis.
    No preview · Article · Sep 2014 · European Journal of Radiology
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    ABSTRACT: To investigate the relationships between tumor heterogeneity, assessed by texture analysis of [18F]fluorodeoxyglucose-positron emission tomography (FDG-PET) images, metabolic parameters, and pathologic staging in patients with non-small cell lung carcinoma (NSCLC). A retrospective analysis of 38 patients with histologically confirmed NSCLC who underwent staging FDG-PET/computed tomography was performed. Tumor images were segmented using a standardized uptake value (SUV) cutoff of 2.5. Five textural features, related to the heterogeneity of gray-level distribution, were computed (energy, entropy, contrast, homogeneity, and correlation). Additionally, metabolic parameters such as SUVmax, SUVmean, metabolic tumor volume (MTV), and total lesion glycolysis (TLG), as well as pathologic staging, histologic subtype, and tumor diameter, were obtained. Finally, a correlation analysis was carried out. Of 38 tumors, 63.2% were epidermoid and 36.8% were adenocarcinomas. The mean ± standard deviation values of MTV and TLG were 30.47 ± 25.17 mL and 197.81 ± 251.11 g, respectively. There was a positive relationship of all metabolic parameters (SUVmax, SUVmean, MTV, and TLG) with entropy, correlation, and homogeneity and a negative relationship with energy and contrast. The T component of the pathologic TNM staging (pT) was similarly correlated with these textural parameters. Textural features associated with tumor heterogeneity were shown to be related to global metabolic parameters and pathologic staging.
    No preview · Article · Sep 2014 · Molecular Imaging
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    ABSTRACT: The purpose of the present study is to explore the relation between glycolytic metabolism assessed by (18)F-fluoro-2-deoxy-D-glucose positron emission tomography/computed tomography ((18)F-FDG PET/CT) and final neoadjuvant chemotherapy (NC) response in locally advanced breast tumors. Of women with breast cancer, 126 were prospectively evaluated. All patients underwent (18)F-FDG PET/CT previous to NC. Standard uptake value (SUV) max was calculated in the primary tumor. After NC, residual primary tumor specimen was histopathologically classified according to Miller and Payne tumor regression grades (TRG), from G1 to G5 and in response groups as good responders (G4 or G5), partial responders (G2 or G3), and non-responders (G1). Furthermore, residual lesions were classified following a binary assessment as responders (G4 or G5) and non-responders (the rest of cases). The relationship between SUV max with TRG and response groups was evaluated. Of tumors, 127 were assessed (a patient had bilateral breast lesions). TRG were as follows: G1 (27), G2 (27), G3 (32), G4 (11), and G5 (30). Forty-one were classified as good responders, 59 as partial responders, and 27 as non-responders. For the binary assessment, 41 lesions were classified as responders and 86 as non-responders. We found statistical differences (p = 0.02) between the mean SUV max and TRG with greater SUV values for G5 compared to the other TRG. Good responders showed greater mean SUV max ± SD compared to partial responders and non-responders (10.51 ± 6.64 for good responders, 6.94 ± 5.81 for partial responders, and 5.23 ± 2.76 for non-responders; p = 0.001). Baseline tumor metabolism assessing by FDG PET/CT was associated with the final histopathologic status after neoadjuvant chemotherapy, with greater SUV max values for good responders compared to the less responder cancers.
    No preview · Article · Aug 2014 · Tumor Biology
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    ABSTRACT: Aim: To compare the performance of six different nomograms and one score in the prediction of non-sentinel lymph node status in a subset of women with breast cancer and micrometastatic sentinel nodes (SN). Material and methods: Twenty-five patients were included in the study. Five different nomograms not specifically designed for micrometastatic SN, one recently published nomogram specially developed for this type of patients and one score were analyzed, and the corresponding receiver operating characteristic curves were obtained. The area under the curve (AUC) was calculated, as well as the false negative and false positive results and their corresponding rates (FNR and FPR) for a cutoff of ≤10% or ≤4 points. Results: The Memorial Sloan Kettering Cancer Center (MSKCC) nomogram showed the best performance in this low-risk group of patients (AUC 0.900, FPR 64%, FNR 0%), followed by the French nomogram. Conclusions: The MSKCC nomogram seems to have the highest accuracy in the identification of patients with low risk of further axillary disease in the subgroup of women with micrometastatic SN.
    No preview · Article · Jul 2014 · Tumori

  • No preview · Article · Jun 2014 · Interactive Cardiovascular and Thoracic Surgery
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    ABSTRACT: To determine the utility of (18)F-FDG (FDG) PET/CT performed in an early and delayed phase during neoadjuvant chemotherapy in the prediction of lymph node histopathological response in patients with locally advanced breast cancer. FDG PET/CT studies performed in 76 patients (mean age 53 years) at baseline (PET-1), after the second course of chemotherapy (PET-2) and after the last course of chemotherapy (PET-3) were prospectively analysed. Inclusion criteria were lymph node involvement detected by PET/CT and non-sentinel node biopsy before or after the baseline PET/CT scan. Following the recommendations of the 12th International Breast Conference (St. Gallen), the patients were divided into five subgroups in relation to biological prognostic factors by immunohistochemistry. For diagnosis visual and semiquantitative analyses was performed. Absence of detectable lymph node uptake on the PET-2 or PET-3 scan with respect to the PET-1 scan was considered metabolic complete response (mCR). Lymph nodes were histopathologically classified according the lymph node regression grade and in response groups as pathological complete response (pCR) or not pCR (type A/D or B/C of the Smith grading system, respectively). ROC analysis was performed to determine a cut-off value of Δ% SUV1-2 and SUV1-3 for prediction of nodal status after chemotherapy. An association between mCR and pCR was found (Cohen's kappa analysis), and associations between phenotypes and metabolic behaviour and the final histopathological status were also found. Lymph node pCR was seen in 34 patients. The sensitivity, specificity, and positive and negative predictive values of PET-2 and PET-3 in establishing the final status of the axilla after chemotherapy were 52 %, 45 %, 50 % and 47 %, and 33 %, 84 %, 67 % and 56 %, respectively. No significant relationship was observed between mCR on PET-2 and PET-3 and pCR (p = 0.31 and 0.99, respectively). Lymph node metabolism on PET-1 was not able to predict the final histopathological status, whereas basal carcinomas showed a higher rate of pCR (70.6 %) than the other groups (p = 0.03). FDG PET/CT seems to have limitations in both the early and delayed evaluation of lymph node status after chemotherapy, with reduced predictive values.
    No preview · Article · Apr 2014 · European Journal of Nuclear Medicine

Publication Stats

338 Citations
107.34 Total Impact Points


  • 2005-2015
    • Hospital General Universitario de Ciudad Real
      Ciudad Real, Castille-La Mancha, Spain
    • Department of Nuclear Medicine
      Nyitra, Nitriansky, Slovakia
  • 2014
    • Complutense University of Madrid
      • Department of Atomic, Molecular and Nuclear Physics
      Madrid, Madrid, Spain
  • 2003-2004
    • Hospital Nuestra Señora del Rosario
      Madrid, Madrid, Spain