Publication date: Available online 12 November 2017
Source:Revista Española de Medicina Nuclear e Imagen Molecular
Author(s): F.J. Gómez-de la Fuente, I. Martínez-Rodríguez, M. de Arcocha-Torres, R. Quirce, J. Jiménez-Bonilla, N. Martínez-Amador, I. Banzo
ObjetivoLa PET/TC con 11C-colina ha mostrado buenos resultados en la reestadificación del cáncer de próstata (CP) con antígeno específico prostático (PSA) elevado. Su uso con niveles bajos es controvertido. Nuestro objetivo fue evaluar la aportación de la 11C-colina PET/TC en pacientes con CP, recidiva bioquímica y PSA <1ng/ml.Material y métodoSe evaluaron retrospectivamente 50 pacientes consecutivos (edad: 65,9±5,6 años) con recidiva bioquímica de CP y PSA <1ng/ml (media: 0,4±0,2). La PET/TC fue adquirida a los 20 min de la administración intravenosa de 555-740 MBq de 11C-colina. El seguimiento mínimo fue de 30 meses.ResultadosDe los 50 pacientes, 21 (42%) mostraron una 11C-colina PET/TC anormal. En 7 (14%) se confirmó la afectación tumoral (4 en lecho prostático, 4 en ganglios pélvicos, 2 en ganglios mediastínicos y un tumor síncrono sigmoide) y se modificó en todos ellos el tratamiento inicialmente previsto. En 2 pacientes (4%) se confirmó enfermedad benigna (uno con sarcoidosis, otro con secuelas de TBC) y en 3 pacientes (6%) ausencia de enfermedad. En los otros 9 pacientes (18%) los hallazgos no fueron estudiados (7 en ganglios mediastínicos y 4 en pélvicos). La 11C-colina PET/TC fue normal en 29 pacientes (58%). Solo en 2 de ellos se confirmó recidiva a los 30 meses.ConclusiónLa 11C-colina PET/TC demostró su utilidad en la recidiva bioquímica de CP y PSA <1 ng/ml en el 14% de los pacientes al mostrar enfermedad tumoral, lo que tuvo implicaciones terapéuticas. En un 4% se detectó enfermedad benigna. Una 11C-colina PET/TC normal se asoció a una tasa de recurrencia muy baja a los 30 meses.Objective11C-choline PET/CT has demonstrated good results in the restaging of prostate cancer (PCa) with high serum prostate specific antigen (PSA), but its use in patients with low serum PSA is controversial. Our aim was to evaluate the contribution of 11C-choline PET/CT in patients with PCa, biochemical relapse and PSA <1 ng/ml.Material and methodFifty consecutive patients (mean age: 65.9±5.6 years) with biochemical relapse of PCa and serum PSA <1ng/ml were evaluated retrospectively. PET/CT was performed 20min after intravenous administration of 555-740 MBq of 11C-choline. Minimum follow up time was 30 months.ResultsTwenty-one out of 50 patients (42%) had an abnormal 11C-choline PET/CT. In 7 out of 21 patients (14%) tumor was confirmed (4 in prostatic bed, 4 in pelvic lymph nodes, 2 in mediastinal lymph nodes and one synchronous sigmoid carcinoma), and in all cases the initial therapeutic planning was modified. In 2 patients (4%) subsequent tests diagnosed a benign disease (one sarcoidosis, one tuberculosis sequelae) and in 3 patients (6%) they ruled out pathology. The other 9 patients (18%) had no further assessment (7 mediastinal and 4 pelvic lymph nodes). Twenty-nine out of 50 patients (58%) had a normal PET/CT. At 30 months, follow up recurrence was confirmed only in 2 of these patients.Conclusions11C-choline PET/CT proved its usefulness in demonstrating tumor in 14% of patients with BR of PCa and serum PSA <1ng/ml, with therapeutic implications. In 4% of patients a benign condition was detected. A normal 11C-choline PET/CT was associated with a very low rate of recurrence at 30 months.
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Σφακιανάκης Αλέξανδρος
ΩτοΡινοΛαρυγγολόγος
Αναπαύσεως 5 Άγιος Νικόλαος
Κρήτη 72100
00302841026182
00306932607174
alsfakia@gmail.com
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