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Inicio Revista Española de Medicina Nuclear e Imagen Molecular (English Edition) Detection of bone metastases in breast cancer patients in the PET/CT era: Do we ...
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Vol. 35. Issue 1.
Pages 3-11 (January - February 2016)
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Vol. 35. Issue 1.
Pages 3-11 (January - February 2016)
Original Article
Detection of bone metastases in breast cancer patients in the PET/CT era: Do we still need the bone scan?
La detección de metástasis óseas en pacientes con cáncer de mama en la era de PET/TAC: ¿necesitamos todavía la gammagrafía ósea?
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M. Caglara,
Corresponding author
mcaglart@gmail.com

Corresponding author.
, O. Kupika, E. Karabulutb, P.F. Høilund-Carlsenc
a Hacettepe University Medical Faculty, Department of Nuclear Medicine, Sihhiye, Ankara 06100, Turkey
b Hacettepe University Medical Faculty, Department of Biostatistics, Sihhiye, Ankara 06100, Turkey
c Department of Nuclear Medicine, Odense University Hospital, 5000 Odense C, Denmark
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Tables (5)
Table 1. Patients’ characteristics.
Table 2. Location of lesions in 86 patients with bone metastases.
Table 3. BS and SPEC/CT results in patients with and without bone metastases.
Table 4. Resultsa of planar BS, SPECT/CT and FDG-PET/CT and for the detection of bone metastases.
Table 5. SUVmax values according to lesion type.
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Abstract
Aim

To examine the value of 18F-fluorodeoxyglucose positron emission tomography/computed tomography (FDG-PET/CT) for the detection of bone metastasis in breast cancer patients and assess whether whole body bone scan (BS) with 99mTc-methylene diphosphonate provides any additional information.

Material and Methods

Study group comprised 150 patients, mean age 52 years (range 27–85) with breast cancer, suspected of having bone metastases. All patients had undergone both FDG-PET/CT and BS with or without single photon emission tomography/computed tomography (SPECT/CT) within a period of 6 weeks. The final diagnosis of bone metastasis was established by histopathological findings, additional imaging, or clinical follow-up longer than 10 months. Cancer antigen 15-3 (CA15-3) and carcinoembryogenic antigen (CEA) were measured in all patients.

Results

Histologically 83%, 7% and 10% had infiltrating ductal, lobular and mixed carcinoma respectively. Confirmed bone metastases were present in 86 patients (57.3%) and absent in 64 (42.7%). Mean CA15-3 and CEA values in patients with bone metastases were 74.6ng/mL and 60.4U/mL respectively, compared to 21.3ng/mL and 3.2U/mL without metastases (p<0.001). The sensitivity of FDG-PET/CT for the detection of bone metastases was 97.6% compared to 89.5% with SPECT/CT. In 57 patients, FDG-PET/CT correctly identified additional pulmonary, hepatic, nodal and other soft tissue metastases, not detected by BS.

Conclusion

Our findings suggest that FDG-PET/CT is superior to BS with or without SPECT/CT.

Keywords:
FDG
PET/CT
Breast cancer
Bone metastasis
Imaging
Bone scintigraphy
Resumen
Objetivo

Para examinar el valor de la 18F-fluorodeoxiglucosa Tomografía por Emisión de Positrones y de la Tomografía Axial Computerizada (FDG-PET/TAC) para la detección de metástasis óseas en pacientes con cáncer de mama y evaluar si el rastreo gammagráfico óseo (GO) con 99mTc-difosfonato de metileno proporciona cualquier información adicional.

Material y métodos

El grupo de estudio estuvo integrado por 150 pacientes, media de edad 52 años (rango 27-85) con cáncer de mama y sospecha de metástasis óseas. Todas las pacientes tenían FDG-PET/TAC y GO con o sin SPECT/TAC en un plazo de 6 semanas. El diagnóstico final de metástasis óseas fue establecido por los resultados histopatológicos, los estudios adicionales de imagen o el seguimiento clínico superior a 10 meses. En todas las pacientes se determinaron los niveles séricos de CA 15-3 y antígeno carcinoembrionario (CEA).

Resultados

Histológicamente, 83%, 7% y 10% tenían carcinoma ductal infiltrante, lobular y mixto respectivamente. Las metástasis óseas confirmadas estuvieron presentes en 86 pacientes (57.3%) y ausentes en 64 (42.7%). Los valores medios de CA15-3 y CEA en pacientes con metástasis óseas fueron 74.6 ng/mL y 60.4 U/mL, respectivamente, en comparación con 21,3 ng/mL y 3,2 U/mL sin metástasis (p <0,001). La sensibilidad de la FDG-PET/TAC para la detección de metástasis óseas fue del 97,6% en comparación con el 89,5%, para la SPECT/TAC. En 57 pacientes, la FDG-PET/TAC identificó correctamente metástasis adicionales pulmonares, hepáticas, ganglios linfáticos y partes blandas, no detectadas por GO.

Conclusión

Nuestros resultados sugieren que la FDG-PET/TAC es superior a GO con o sin SPECT/TAC.

Palabras clave:
FDG
PET/TAC
Cáncer de mama
Metástasis ósea
Imágenes
Gammagrafía ósea

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