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3.
Rev. esp. med. nucl. imagen mol. (Ed. impr.) ; 41(4): 231-238, jul. - ago. 2022. ilus, tab, graf
Artigo em Espanhol | IBECS | ID: ibc-205185

RESUMO

Objetivo: Analizar la eficacia terapéutica, seguridad y valor pronóstico de diferentes biomarcadores de la radioembolización transarterial con esferas de itrio-90 (TARE) en pacientes con metástasis hepáticas de cáncer colorrectal. Material y métodos: Estudio prospectivo que incluye los pacientes con metástasis hepáticas de cancer colorrectal tratados con TARE entre noviembre de 2015 y junio de 2020. Se analizó la respuesta terapéutica (3 y 6 meses, criterios RECIST v1.1) mediante el cálculo de las tasas de respuesta tumoral objetiva (ORR) y de control de la enfermedad (DCR), así como la asociación de los biomarcadores con la respuesta terapéutica y la supervivencia global (SG) y libre de progresión (SLP). Resultados: Treinta TARE en 23 pacientes (edad media 61,61±9,13 años; 56,5% varones). La ORR a los 3 meses fue del 16,7% y el DCR del 53,3%. A los 6 meses progresaron el 80% de los pacientes. La ORR y DCR se asociaron con la edad (p=0,047), tratamiento con bevacizumab (p=0,008), hemoglobina (p=0,008), NLR (p=0,040), albúmina (p=0,012) y GPT (p=0,023) previas a la TARE, y la dosis absorbida tumoral estimada>115Gy (p=0,033). La mediana de SG fue de 12 meses (IC 95%: 4,75-19,25 meses) y de SLP 3 meses (IC 95%: 2,41-3,59 meses). La SG se asoció con la cirugía del tumor primario (p=0,019), mutación KRAS (p=0,024), hemoglobina (p=0,009), NLR (p=0,005) y PLR (p=0,042) previos a la TARE. Conclusión: Los biomarcadores con capacidad para predecir el pronóstico y respuesta terapéutica a la TARE incluyen desde parámetros bioquímicos a factores relacionados con la dosimetría tumoral estimada (AU)


Objetivo: To determine the therapeutic effectiveness and safety of transarterial radioembolization (TARE) with Yttrium-90 in patients with colorectal cancer (CRC) liver metastases and to evaluate the prognostic value of different biomarkers. Material and methods: This prospective longitudinal study enrolled consecutive patients with CRC liver metastases treated with TARE between November 2015 and june 2020. The therapeutic response at three and six months (RECIST1.1 criteria) and the relationship of biomarkers with therapeutic response, by calculating objective tumor response rates (ORR) and disease control (DCR), and overall survival (OS) and progression-free (PFS). Results: Thirty TAREs were performed in 23 patients (mean age, 61,61±9,13 years; 56,5% male). At three months, the objective response rate (ORR) was 16,7% and the disease control rate (DCR) 53,3%. At six months, the disease progressed in 80%. The ORR and DCR were significantly associated with age at diagnosis (P=.047), previous bevacizumab treatment (P=.008), pre-TARE haemoglobin (P=.008), NLR (P=.040), pre-TARE albumin (P=.012), pre-TARE ALT (P=.023) and tumour-absorbed dose>115Gy (P=.033). Median overall survival (OS) was 12 months (95% CI, 4.75-19.25 months) and median progression-free survival (PFS) 3 months (95% CI, 2.41-3.59). OS was significantly associated with primary tumour resection (P=.019), KRAS mutation (HR: 5.15; P=.024), pre-TARE haemoglobin (HR: .50; p=.009), pre-TARE NLR (HR: 1.65; P=.005) and PLR (HR: 1.01; P=.042). Conclusion: TARE prognosis and therapeutic response were predicted by different biomarkers, ranging from biochemical parameters to tumour dosimetrics (AU)


Assuntos
Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Idoso , Neoplasias Colorretais/patologia , Neoplasias Hepáticas/secundário , Neoplasias Hepáticas/radioterapia , Radioisótopos de Ítrio/administração & dosagem , Biomarcadores , Estudos Longitudinais , Estudos Prospectivos , Compostos Radiofarmacêuticos/uso terapêutico , Radioisótopos , Prognóstico , Análise de Sobrevida
5.
Artigo em Inglês | MEDLINE | ID: mdl-34454892

RESUMO

OBJECTIVE: To determine the therapeutic effectiveness and safety of transarterial radioembolization (TARE) with Yttrium-90 in patients with colorectal cancer (CRC) liver metastases and to evaluate the prognostic value of different biomarkers. MATERIAL AND METHODS: This prospective longitudinal study enrolled consecutive patients with CRC liver metastases treated with TARE between November 2015 and june 2020. The therapeutic response at three and six months (RECIST1.1 criteria) and the relationship of biomarkers with therapeutic response, by calculating objective tumor response rates (ORR) and disease control (DCR), and overall survival (OS) and progression-free (PFS). RESULTS: Thirty TAREs were performed in 23 patients (mean age, 61.61 ±â€¯9.13 years; 56.5% male). At three months, the objective response rate (ORR) was 16.7% and the disease control rate (DCR) 53.3%. At six months, the disease progressed in 80%. The ORR and DCR were significantly associated with age at diagnosis (P = 0.047), previous bevacizumab treatment (P = 0.008), pre-TARE haemoglobin (P = 0.008), NLR (P = 0.040), pre-TARE albumin (P = 0.012), pre-TARE ALT (P = 0.023) and tumour-absorbed dose > 115 Gy (P = 0.033). Median overall survival (OS) was 12 months (95% CI, 4.75-19.25 months) and median progression-free survival (PFS) 3 months (95% CI, 2.41-3.59). OS was significantly associated with primary tumour resection (P = 0.019), KRAS mutation (HR: 5.15; P = 0.024), pre-TARE haemoglobin (HR: 0.50; p = 0.009), pre-TARE NLR (HR: 1.65; P = 0.005) and PLR (HR: 1.01; P = 0.042). CONCLUSION: TARE prognosis and therapeutic response were predicted by different biomarkers, ranging from biochemical parameters to tumour dosimetrics.


Assuntos
Neoplasias do Colo , Neoplasias Hepáticas , Idoso , Biomarcadores , Feminino , Humanos , Neoplasias Hepáticas/secundário , Estudos Longitudinais , Masculino , Microesferas , Pessoa de Meia-Idade , Estudos Prospectivos , Compostos Radiofarmacêuticos/uso terapêutico , Estudos Retrospectivos , Radioisótopos de Ítrio
6.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-34294586

RESUMO

OBJETIVE: To determine the therapeutic effectiveness and safety of transarterial radioembolization (TARE) with Yttrium-90 in patients with colorectal cancer (CRC) liver metastases and to evaluate the prognostic value of different biomarkers. MATERIAL AND METHODS: This prospective longitudinal study enrolled consecutive patients with CRC liver metastases treated with TARE between November 2015 and june 2020. The therapeutic response at three and six months (RECIST1.1 criteria) and the relationship of biomarkers with therapeutic response, by calculating objective tumor response rates (ORR) and disease control (DCR), and overall survival (OS) and progression-free (PFS). RESULTS: Thirty TAREs were performed in 23 patients (mean age, 61,61±9,13 years; 56,5% male). At three months, the objective response rate (ORR) was 16,7% and the disease control rate (DCR) 53,3%. At six months, the disease progressed in 80%. The ORR and DCR were significantly associated with age at diagnosis (P=.047), previous bevacizumab treatment (P=.008), pre-TARE haemoglobin (P=.008), NLR (P=.040), pre-TARE albumin (P=.012), pre-TARE ALT (P=.023) and tumour-absorbed dose>115Gy (P=.033). Median overall survival (OS) was 12 months (95% CI, 4.75-19.25 months) and median progression-free survival (PFS) 3 months (95% CI, 2.41-3.59). OS was significantly associated with primary tumour resection (P=.019), KRAS mutation (HR: 5.15; P=.024), pre-TARE haemoglobin (HR: .50; p=.009), pre-TARE NLR (HR: 1.65; P=.005) and PLR (HR: 1.01; P=.042). CONCLUSION: TARE prognosis and therapeutic response were predicted by different biomarkers, ranging from biochemical parameters to tumour dosimetrics.

8.
Rev. esp. med. nucl. imagen mol. (Ed. impr.) ; 35(5): 283-286, sept.-oct. 2016. tab, graf, ilus
Artigo em Inglês | IBECS | ID: ibc-155010

RESUMO

Objective. To assess the safety of regadenoson, a selective agonist of A2A adenosine receptors, combined with low-level exercise in subjects with severe chronic obstructive pulmonary disease (COPD), referred for myocardial perfusion imaging (MPI). Methods. We studied prospectively 12 male patients with severe COPD. Stress was 4min of low-level exercise with bolus injection of regadenoson (0.4mg) at 1.5min, followed by 99mTc-MPI agent injection. Demographics, medical history, lung medications, adverse events, oxygen saturation (SatO2), MPI findings for coronary artery disease (CAD), and changes in systolic blood pressure (SBP), and heart rate (HR) were registered. Results. The observed adverse event profile of regadenoson was similar to that of patients with mild-moderate COPD. There was no clinical exacerbation of COPD. Adverse events were self-limiting: dyspnea (33.3%), fatigue (25.0%), chest pain, headache (16.7%, respectively), and gastrointestinal discomfort, dry mouth, flushing, feeling hot and dizziness (8.3%, respectively). 25.0% of patients did not report any symptoms. We observed significant increases in SBP and HR from baseline (142.6mmHg±22.3 vs 152.5mmHg±18.5, and 80 b.p.m.±18 vs 105 b.p.m.±22, respectively; p<0.05). Conclusions. Regadenoson combined with low-level exercise is safe and well tolerated in stable patients with severe COPD undergoing MPI (AU)


Objetivo. Evaluar la seguridad de regadenosón, un agonista selectivo de los receptores adenosínicos A2A, combinado con ejercicio de baja intensidad, en sujetos con enfermedad pulmonar obstructiva crónica (EPOC) severa, en estudios de perfusión miocárdica. Métodos. Se estudiaron de forma prospectiva 12 pacientes con EPOC severa (todos ellos varones). El estrés consistió en la realización de un ejercicio de baja intensidad durante 4min junto con la administración de un bolo de regadenosón (0,4mg) a los 1,5min, seguido de la inyección del radiofármaco tecneciado de perfusión miocárdica. Se registraron los datos demográficos, el historial médico, la medicación para patología respiratoria, los efectos adversos, la saturación de oxígeno (SatO2), los hallazgos de enfermedad coronaria en el estudio de perfusión miocárdica y los cambios en la presión arterial sistólica (PAS) y la frecuencia cardiaca (FC). Resultados. El perfil de efectos adversos de regadenosón fue similar al de pacientes con EPOC leve-moderada. No se produjeron exacerbaciones clínicas de la EPOC. Los efectos adversos experimentados, todos autolimitados, fueron disnea (33,3%), cansancio (25%), dolor torácico, cefalea (16,7%, respectivamente), molestias gastrointestinales, boca seca, rubefacción, calor y mareos (8,3%, respectivamente). El 25% de los pacientes no informaron síntomas. Se observaron aumentos significativos desde los valores basales de la PAS y la FC (142,6mmHg±22,3 vs 152,5mmHg±18,5 y 80l.p.m.±18 vs 105l.p.m.±22, respectivamente; p<0,05). Conclusiones. Regadenosón combinado con ejercicio de baja intensidad es seguro y bien tolerado en pacientes con EPOC severa estable sometidos a estudios de perfusión miocárdica (AU)


Assuntos
Humanos , Masculino , Feminino , Segurança do Paciente/legislação & jurisprudência , Segurança do Paciente/normas , Doença Pulmonar Obstrutiva Crônica/epidemiologia , Doença Pulmonar Obstrutiva Crônica , Compostos Radiofarmacêuticos/administração & dosagem , Compostos Radiofarmacêuticos/análise , Vasodilatadores/efeitos adversos , Perfusão/efeitos adversos , Estudos Prospectivos , Pressão Arterial/fisiologia
9.
Rev Esp Med Nucl Imagen Mol ; 35(5): 283-6, 2016.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-27160774

RESUMO

OBJECTIVE: To assess the safety of regadenoson, a selective agonist of A2A adenosine receptors, combined with low-level exercise in subjects with severe chronic obstructive pulmonary disease (COPD), referred for myocardial perfusion imaging (MPI). METHODS: We studied prospectively 12 male patients with severe COPD. Stress was 4min of low-level exercise with bolus injection of regadenoson (0.4mg) at 1.5min, followed by (99m)Tc-MPI agent injection. Demographics, medical history, lung medications, adverse events, oxygen saturation (SatO2), MPI findings for coronary artery disease (CAD), and changes in systolic blood pressure (SBP), and heart rate (HR) were registered. RESULTS: The observed adverse event profile of regadenoson was similar to that of patients with mild-moderate COPD. There was no clinical exacerbation of COPD. Adverse events were self-limiting: dyspnea (33.3%), fatigue (25.0%), chest pain, headache (16.7%, respectively), and gastrointestinal discomfort, dry mouth, flushing, feeling hot and dizziness (8.3%, respectively). 25.0% of patients did not report any symptoms. We observed significant increases in SBP and HR from baseline (142.6mmHg±22.3 vs 152.5mmHg±18.5, and 80 b.p.m.±18 vs 105 b.p.m.±22, respectively; p<0.05). CONCLUSIONS: Regadenoson combined with low-level exercise is safe and well tolerated in stable patients with severe COPD undergoing MPI.


Assuntos
Agonistas do Receptor A2 de Adenosina/uso terapêutico , Doença Pulmonar Obstrutiva Crônica/tratamento farmacológico , Purinas/uso terapêutico , Pirazóis/uso terapêutico , Agonistas do Receptor A2 de Adenosina/efeitos adversos , Idoso , Teste de Esforço , Humanos , Masculino , Imagem de Perfusão do Miocárdio , Projetos Piloto , Estudos Prospectivos , Purinas/efeitos adversos , Pirazóis/efeitos adversos , Índice de Gravidade de Doença
16.
Rev. esp. med. nucl. imagen mol. (Ed. impr.) ; 31(3): 117-123, mayo-jun. 2012.
Artigo em Espanhol | IBECS | ID: ibc-99902

RESUMO

Objetivo. Validar la biopsia selectiva del ganglio centinela (BGC) en pacientes con cáncer de mama tratadas con quimioterapia neoadyuvante. Materiales y métodos. Estudio prospectivo de enero de 2008 a enero de 2011, 88 pacientes con una edad media de 49,4 años, con cáncer de mama infiltrante T1-3, N0-1, M0, tratadas con epirrubicina/ciclofosfamida, docetaxel y trastuzumab en Her2/neu positivas. El estatus axilar se estableció por exploración física, ecografía axilar y punción ecoguiada de ganglios sospechosos. El día antes de la cirugía se inyectaron periareolarmente 74-111 MBq de 99mTc-nanocoloide de albúmina. En todas se realizó cirugía mamaria, BGC y linfadenectomía axilar. El ganglio centinela (GC) se analizó por cortes de congelación, hematoxilina-eosina, inmunohistoquímica u OSNA. Resultados. El tamaño medio del tumor fue de 3,5 cm. Según el tipo histológico, 69 se clasificaron como ductal infiltrante, 16 como lobulillar infiltrante y 3 como de otro tipo. Treinta y siete pacientes tenían axila clínica/ecográfica positiva al diagnóstico. La respuesta clínica del tumor primario fue: 38 completa, 45 parcial, 5 no respuesta. En todas las pacientes la axila fue clínica/ecográfica negativa después del tratamiento. En 25 casos hubo respuesta patológica completa en el tumor primario. El porcentaje de identificación del GC fue del 92,0%, 6 de las 7 pacientes sin migración eran axila clínica/ecográfica positiva al diagnóstico. En el 96,3% de los casos el GC determinó correctamente el estatus axilar. La tasa de falsos negativos fue del 8,3%. En el 69,4% de los casos el GC era el único afectado de la axila. El número medio de GC identificados fue 1,7 y el de ganglios axilares extirpados fue 13,2. Conclusión. La BGC es una técnica factible en pacientes con cáncer de mama tratadas con quimioterapia neoadyuvante, pudiendo evitar linfadenectomías innecesarias(AU)


Aim. To evaluate the accuracy of sentinel lymph node biopsy (SLNB) in operable breast cancer patients treated with neoadjuvant chemotherapy (NAC). Materials and methods. Between January 2008-2011, 88 women, mean age 49.4 years, with infiltrating breast carcinoma, were studied prospectively. Patients were T1-3, N0-1, M0. Prior to surgery, the patients received chemotherapy (epirubicin/cyclophosphamide, docetaxel), and trastuzumab in Her2/neu-positive patients. Axillary status was established by physical examination, ultrasound-guided core needle biopsy of any suspicious lymph node. The day before surgery, 74-111 MBq of 99mTc-albumin nanocolloid was injected periareolarly. All patients underwent breast surgery, with SLNB, followed by complete axillary lymph node dissection (ALND). Sentinel lymph node (SLN) were examined by frozen sections, hematoxylin-eosin staining and immunohistochemical analysis or One Step Nucleic Acid Amplification (OSNA). Results. Mean tumor size: 3.5 cm. Histologic type: 69 invasive ductal, 16 invasive lobular and 3 others. Thirty seven patients had clinical/ultrasound node-positive at presentation. Clinical response of primary tumor to NAC: complete in 38, partial in 45, and stable disease in 5 patients. A pathological complete response was achieved in 25. All patients were clinically node-negative after NAC. SLN identification rate was 92.0%. Six of 7 patients in whom SLN was not found had clinical/ultrasound positive axilla before NAC. SLN accurately determined the axillary status in 96.5%. False negative rate was 8.3%. In 69.4% of patients, SLN was the only positive node. The mean number of SLN removed was 1.7 and nodes resected from the ALND were 13.2. Conclusion. SLN biopsy after NAC can predict the axillary status with a high accuracy in patients with breast cancer, avoiding unnecessary ALND(AU)


Assuntos
Humanos , Feminino , Pessoa de Meia-Idade , Biópsia de Linfonodo Sentinela/métodos , Biópsia de Linfonodo Sentinela/tendências , Biópsia de Linfonodo Sentinela , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/cirurgia , Terapia Neoadjuvante/métodos , Terapia Neoadjuvante , Carcinoma Ductal de Mama/complicações , Carcinoma Ductal de Mama/cirurgia , Compostos Radiofarmacêuticos , Biópsia de Linfonodo Sentinela/instrumentação , Neoplasias da Mama , Medicina Nuclear/métodos , Medicina Nuclear/tendências , Terapia Neoadjuvante/tendências , Estudos Prospectivos , Carcinoma Ductal de Mama , Imuno-Histoquímica/métodos , Imuno-Histoquímica/tendências , /métodos
17.
Rev Esp Med Nucl Imagen Mol ; 31(3): 117-23, 2012.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-21676504

RESUMO

AIM: To evaluate the accuracy of sentinel lymph node biopsy (SLNB) in operable breast cancer patients treated with neoadjuvant chemotherapy (NAC). MATERIALS AND METHODS: Between January 2008-2011, 88 women, mean age 49.4 years, with infiltrating breast carcinoma, were studied prospectively. Patients were T1-3, N0-1, M0. Prior to surgery, the patients received chemotherapy (epirubicin/cyclophosphamide, docetaxel), and trastuzumab in Her2/neu-positive patients. Axillary status was established by physical examination, ultrasound-guided core needle biopsy of any suspicious lymph node. The day before surgery, 74-111 MBq of (99m)Tc-albumin nanocolloid was injected periareolarly. All patients underwent breast surgery, with SLNB, followed by complete axillary lymph node dissection (ALND). Sentinel lymph node (SLN) were examined by frozen sections, hematoxylin-eosin staining and immunohistochemical analysis or One Step Nucleic Acid Amplification (OSNA). RESULTS: Mean tumor size: 3.5 cm. Histologic type: 69 invasive ductal, 16 invasive lobular and 3 others. Thirty seven patients had clinical/ultrasound node-positive at presentation. Clinical response of primary tumor to NAC: complete in 38, partial in 45, and stable disease in 5 patients. A pathological complete response was achieved in 25. All patients were clinically node-negative after NAC. SLN identification rate was 92.0%. Six of 7 patients in whom SLN was not found had clinical/ultrasound positive axilla before NAC. SLN accurately determined the axillary status in 96.5%. False negative rate was 8.3%. In 69.4% of patients, SLN was the only positive node. The mean number of SLN removed was 1.7 and nodes resected from the ALND were 13.2. CONCLUSION: SLN biopsy after NAC can predict the axillary status with a high accuracy in patients with breast cancer, avoiding unnecessary ALND.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Carcinoma Ductal de Mama/secundário , Carcinoma Lobular/secundário , Terapia Neoadjuvante , Biópsia de Linfonodo Sentinela , Adulto , Idoso , Anticorpos Monoclonais Humanizados/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Axila , Biópsia por Agulha , Neoplasias da Mama/patologia , Neoplasias da Mama/cirurgia , Carcinoma Ductal de Mama/diagnóstico por imagem , Carcinoma Ductal de Mama/tratamento farmacológico , Carcinoma Ductal de Mama/patologia , Carcinoma Ductal de Mama/cirurgia , Carcinoma Lobular/diagnóstico por imagem , Carcinoma Lobular/tratamento farmacológico , Carcinoma Lobular/patologia , Carcinoma Lobular/cirurgia , Terapia Combinada , Ciclofosfamida/administração & dosagem , Docetaxel , Epirubicina/administração & dosagem , Feminino , Humanos , Metástase Linfática/diagnóstico por imagem , Metástase Linfática/patologia , Mastectomia , Pessoa de Meia-Idade , Estudos Prospectivos , Cintilografia , Compostos Radiofarmacêuticos , Taxoides/administração & dosagem , Agregado de Albumina Marcado com Tecnécio Tc 99m , Trastuzumab , Ultrassonografia de Intervenção
18.
Rev. esp. med. nucl. (Ed. impr.) ; 30(5): 267-275, sept.-oct. 2011.
Artigo em Espanhol | IBECS | ID: ibc-90610

RESUMO

Introducción. El cáncer de vesícula (CV) es una neoplasia de mal pronóstico en la que el empleo de la tomografía por emisión de positrones (PET) con 18F-fluorodesoxigluosa (FDG) como herramienta diagnóstica puede ser útil, aunque su papel no está bien definido. Diseño/metodología. Cohorte prospectiva de pacientes con lesión radiológica vesicular sospechosa de malignidad en estudio de diagnóstico y estadificación prequirúrgico mediante PET-FDG en equipos convencionales (PET) y equipos multimodalidad (PET-TAC). Estimación de validez diagnóstica contrastando los resultados de ambos procedimientos con el estudio histopatológico y/o la evolución clínica de los pacientes. Análisis del impacto clínico derivado de su implantación en el diagnóstico del CV. Resultados. Se reclutaron 42 pacientes, 22 con resultado histológico de malignidad y 20 de benignidad. La precisión diagnóstica global fue del 83,33% para el diagnóstico oncológico de la lesión primaria, del 88,89% para la afectación ganglionar y del 85,1% para la afectación metastásica. El SUVmáx medio de las lesiones vesiculares malignas fue 6,14±2,89. La curva ROC mostró un punto de corte de SUVmáx: 3,65 para malignidad. La validez diagnóstica de la PET (n=21) fue discretamente inferior que la de la PET-TAC (n=21). La realización de la PET-FDG modificó la actitud terapéutica en el 14,8%, al encontrar enfermedad diseminada no sospechada. Comentarios. La PET-FDG diagnostica con precisión la malignidad o benignidad de una lesión vesicular sospechosa, añadiendo la capacidad de identificar enfermedad metastásica no sospechada. La PET-TAC mejora la precisión diagnóstica de la PET por la complementariedad metabólico-estructural de su información. El SUVmáx tiene un valor complementario al análisis visual(AU)


gfg(AU)


Assuntos
Humanos , Masculino , Feminino , Tomografia por Emissão de Pósitrons/instrumentação , Tomografia por Emissão de Pósitrons/métodos , Fluordesoxiglucose F18 , Vesícula Biliar/lesões , Vesícula Biliar , Neoplasias da Vesícula Biliar , /instrumentação , /métodos , Tomografia por Emissão de Pósitrons/tendências , Tomografia por Emissão de Pósitrons , /métodos , Neoplasias da Vesícula Biliar/patologia , Estudos Prospectivos , Curva ROC
19.
Rev. esp. med. nucl. (Ed. impr.) ; 30(4): 211-216, jul.-ago. 2011.
Artigo em Espanhol | IBECS | ID: ibc-89619

RESUMO

Objetivo. Evaluar la validez diagnóstica de la tomografía por emisión de positrones con 18F-fluoro-2-deoxi-D-glucosa y la tomografía computarizada (PET/TAC) en la estadificación ganglionar mediastínica (N2) en pacientes con cáncer de pulmón de células no pequeñas (CPCNP) y analizar el papel de la estadificación mediante pruebas invasivas para la verificación de los hallazgos de la tomografía por emisión de positrones (PET)/tomografía computerizada (TAC). Material y métodos. Estudio retrospectivo incluyendo a pacientes con diagnóstico histopatológico de CPCNP, estadificados como N2 mediante TAC+C y estudiados con PET/TAC. Se confirmaron mediante análisis histopatológico de la pieza quirúrgica cuando se dispuso o por consenso iconográfico en el comité de tumores torácicos. Se ha calculado la sensibilidad, especificidad, valor predictivo positivo y valor predictivo negativo del estudio PET/TAC en la correcta clasificación de los pacientes N2. Resultados. Se incluyeron 34 pacientes clasificados como N2 mediante TAC+C. El PET/TAC clasificó a 30 pacientes como estadio N2. Se encontraron discrepancias en 4 pacientes, dos clasificados como N1 y dos como N0. Los resultados fueron confirmados histológicamente en 20 pacientes. El estudio PET/TAC no mostró falsos positivos. La sensibilidad fue del 94,7%, la especificidad y el valor predictivo positivo fue del 100% y el valor predictivo negativo del 50%. Conclusiones. El estudio PET/TAC presenta una alta sensibilidad y valor predictivo positivo en la correcta clasificación de pacientes con afectación ganglionar mediastínica (N2). Nuestros resultados sugieren que en pacientes con cáncer de pulmón potencialmente resecable, candidatos a tratamiento con quimioterapia neoadyuvante, la mediastinoscopia podría reservarse para la re-estadificación(AU)


Purpose. To evaluate the accuracy of integrated positron emission tomography with 18F-fluoro-2-deoxy-D-glucose (FDG) and computed tomography (PET/CT) in mediastinal lymph node staging in patients with potentially operable (N2) non-small cell lung cancer (NSCLC) and to ascertain the role of invasive staging in verifying positron emission tomography (PET)/computed tomography (CT) results. Material and methods. A retrospective study of consecutive patients with pathologically-proven NSCLC and N2 staging by enhanced CT was performed. A PET/CT scan was performed for all the patients. Lymph node staging was pathologically confirmed when it was possible or by consensus in the Thoracic Cancer Committee. Sensitivity, specificity, negative predictive value and positive predictive value of PET/CT in N2 cases were determined. Results. A total of 34 patients with N2 by CT were evaluated. PET/CT showed N2 in 30 patients. Discrepancies were found in four patients, two patients were classified as N1 in PET/CT and two patients as N0. Lymph node staging was pathologically confirmed in 20 patients. No false positives were found in PET/CT study. Sensitivity was 94.7%, specificity and positive predictive values were 100% and negative predictive value was 50%. Conclusions. Our data show that integrated PET/CT provides high sensitivity and positive predictive value in mediastinal nodal staging of NSCLC patients. Therefore, in patients with potentially resectable lung cancer, neoadjuvant chemotherapy candidate, mediastinoscopy could be reserved for restaging after induction therapy(AU)


Assuntos
Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Neoplasias Pulmonares , Mediastinoscopia , Sensibilidade e Especificidade , Tomografia por Emissão de Pósitrons , /métodos , /métodos , Mediastinoscopia/tendências , Neoplasias do Mediastino , Estudos Retrospectivos , Valor Preditivo dos Testes , Cisto Epidérmico/complicações , Linfonodos
20.
Rev. esp. med. nucl. (Ed. impr.) ; 30(3): 174-179, mayo-jun. 2011.
Artigo em Espanhol | IBECS | ID: ibc-129010

RESUMO

El carcinoma paratiroideo (CPT) es un tumor poco frecuente que suele ser hiperfuncionante, produciendo un exceso de hormona paratiroidea. El hiperparatiroidismo produce trastornos del metabolismo óseo, como osteopenia y en ocasiones tumores pardos. Los tumores pardos son lesiones óseas benignas, pero localmente destructivas, cuyo diagnóstico diferencial con metástasis u otros tipos de tumores primarios puede ser complicado. La técnica habitual para la detección de patología paratiroidea es la gammagrafía con 99mTc-sestamibi, con una sensibilidad del 85–100% y una especificidad cercana al 100% en adenomas paratiroideos, presentando cifras muy similares en la detección del CPT. Presentamos el caso de un paciente diagnosticado de hiperparatiroidismo de origen tumoral con lesiones óseas asociadas en el que la gammagrafía con 99mTc-sestamibi presentó un falso negativo en la detección de patología paratiroidea. Sin embargo, la PET/TAC-18F-FDG detectó el CPT y ayudó en el diagnóstico diferencial de las lesiones óseas asociadas, que fueron finalmente tumores pardos(AU)


Parathyroid carcinoma (PTC) is a rare malignant disease that is usually hyperfunctioning, which produces an excess of parathyroid hormone. Hyperparathyroidism causes bone metabolism disorders, as osteopenia and sometimes brown tumors. Brown tumors are benign but locally aggressive bone lesions, whose differential diagnosis with metastases or other primary malignancies may be complicated. 99mTc-Sestamibi scan is the usual procedure for the detection of parathyroid pathology, with a sensitivity of 85–100% and specificity close to 100% in parathyroid adenomas, it having similar percentages in the detection of PTC. We present the case of a patient diagnosed of a malignant hyperparathyroidism associated with bone lesions in which the 99mTc-Sestamibi scan showed a false negative result in the detection of parathyroid condition. However, 18F-FDG-PET/CT detected the PTC and helped in the differential diagnosis of associated bone lesions, which were finally confirmed as brown tumors(AU)


Assuntos
Humanos , Masculino , Pessoa de Meia-Idade , Reações Falso-Negativas , Tecnécio Tc 99m Sestamibi , Carcinoma/diagnóstico , Neoplasias das Paratireoides/complicações , Neoplasias das Paratireoides/diagnóstico , Tomografia por Emissão de Pósitrons/métodos , Tomografia Computadorizada de Emissão/métodos , Sensibilidade e Especificidade , Tecnécio Tc 99m Sestamibi/química , Tecnécio Tc 99m Sestamibi/farmacocinética , Tecnécio Tc 99m Sestamibi/efeitos da radiação , Carcinoma , Hiperparatireoidismo/complicações , Doenças Ósseas Metabólicas/complicações
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