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Vol. 44. Issue 6.
Pages 437-443 (July - August 2020)
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Vol. 44. Issue 6.
Pages 437-443 (July - August 2020)
Original article
Usefulness of 18F-choline positron emission tomography-computed tomography in the therapeutic management of patients with biochemical recurrence of prostate adenocarcinoma treated with brachytherapy
Utilidad de la tomografía de emisión de positrones/tomografía computarizada con 18F-colina en el manejo terapéutico de pacientes con recidiva bioquímica de adenocarcinoma de próstata tratados con braquiterapia
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E. López Rodrígueza,
Corresponding author
, J.L. Tirado Hospitala, R.M Álvarez Péreza, L. Gómez Izquierdob, J.M. Jiménez-Hoyuelaa
a Servicio de Medicina Nuclear, Hospital Universitario Virgen del Rocío, Sevilla, Spain
b Servicio de Anatomía Patológica, Hospital Universitario Virgen del Rocío, Sevilla, Spain
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Table 1. Clinical characteristics of the patients.
Table 2. Representation of the therapeutic approach before PET/CT and the change in therapeutic management.
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Abstract
Objective

The objective of the study was to evaluate the usefulness of 18F-choline PET/CT in biochemically recurrent prostate cancer patients treated with brachytherapy, as well as to assess the changes in therapeutic management derived from its outcome.

Material and methods

Retrospective study of 20 patients between 51 and 78 years old, with a history of prostate adenocarcinoma that had been treated with brachytherapy and presented biochemical recurrence (PSA 3.1−12 ng/mL) and staging tests (CT and bone scan) without alterations, were included. The findings visualized in the PET/CT scan with 18F-choline were correlated with the histopathology and/or the evolution of the PSA after therapy.

Results

18F-choline PET/CT scan only detected local recurrence in 15 patients. Local and regional recurrences were seen in 4 patients, and 1 patient presented local and bone recurrence. Local recurrence detected in PET was confirmed by anatomopathological studies in 85% of the cases. In one patient, these findings (PET scan) turned out to be prostatitis, and it could not be confirmed in another patient. Of the cases with local and regional recurrence, local recurrence was histologically confirmed in 3 out of 4 patients.

18F-choline PET/CT changed the therapeutic management in 25% of the patients, discarding the initially planned salvage surgery in 3 cases, 1 radiotherapy and 1 brachytherapy.

Conclusion

18F-choline PET/CT could be a useful technique in the group of patients with biochemical recurrence after brachytherapy, providing locoregional and distant involvement findings which had not been detected with conventional imaging tests, thus determining a more adequate therapeutic management.

Keywords:
Prostate cancer
Biochemical recurrence
Brachytherapy
18F-choline positron emission tomography- computed tomography
Resumen
Objetivo

El objetivo del trabajo fue valorar la utilidad de la PET/TC con 18F- colina en pacientes con cáncer de próstata tratados con braquiterapia en recidiva bioquímica, así como valorar los cambios en el manejo terapéutico derivados de su resultado.

Material y métodos

Estudio retrospectivo en el que se incluyeron 20 pacientes entre 51 y 78 años, con antecedente de adenocarcinoma de próstata que habían sido tratados con braquiterapia, que presentaban recidiva bioquímica (PSA 3,1-12 ng/mL) y estudio de extensión (TC y gammagrafía ósea) sin alteraciones. Los hallazgos visualizados en la PET/TC con 18F-colina fueron correlacionados con la histopatología y/o la evolución del PSA tras la terapia.

Resultados

En 15 pacientes la PET/TC con 18F- colina detectó únicamente recidiva local. En 4 pacientes recidiva local y linfática y en 1 paciente afectación local y ósea. La recidiva local detectada en PET se confirmó anatomopatológicamente en el 85 % de los casos. En un paciente los hallazgos visualizados en el PET resultó ser una prostatitis y en otro paciente no se pudo confirmar. De los pacientes con recidiva local y linfática, se confirmó histológicamente la recidiva local en 3 de 4 pacientes.

En el 25 % de los pacientes, la PET/TC con 18F-colina cambio el manejo terapéutico, desestimando la cirugía de rescate inicialmente prevista en 3 casos, en 1 radioterapia y en 1 la braquiterapia.

Conclusión

La PET/TC con 18F-colina podría ser una técnica útil en el grupo de pacientes tratados con braquiterapia con recidiva bioquimica, permitiendo localizar la afectación locorregional y a distancia no detectada con imagenes convencionales, determinando así un manejo terapéutico más adecuado.

Palabras clave:
Cáncer de próstata
Recidiva bioquímica
Braquiterapia
Tomografia por emisión de positrones/tomografía computarizada con
18F- colina

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