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Ortega-Candil A, Rodríguez-Rey C, Cano-Carrizal R, Cala-Zuluaga E, González Larriba JL, Jiménez-Ballvé A, Fuentes-Ferrer ME, Cabrera-Martín MN, Pérez-Castejón MJ, García García-Esquinas M, Lapeña-Gutierrez L, Carreras-Delgado JL. Breslow thickness and (18)F-FDG PET-CT result in initial staging of cutaneous melanoma: Can a cut-off point be established? Rev Esp Med Nucl Imagen Mol 2015; 35:96-101. [PMID: 26597332 DOI: 10.1016/j.remn.2015.09.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 09/18/2015] [Accepted: 09/21/2015] [Indexed: 10/22/2022]
Abstract
AIM To establish a Breslow Thickness (BT) cut-off point for indication of PET-CT of cutaneous melanoma in early stages and evaluate its prognostic value. MATERIAL AND METHODS Retrospective analysis of 347 PET-CT studies with diagnosis of melanoma, of which 108 were performed for initial staging. Thirty-one patients were excluded, and a final sample of 77 patients remained. A ROC curve analysis was performed to establish an optimal cut-off point. A survival analysis was performed, considering death assignable to melanoma as the main event, for the evaluation of its prognostic value. RESULTS Forty-seven (61.04%) of all 77 patients selected were men, and 11 (14.29%) had a positive PET-CT result. Mean age was 65.17±15.00 years. The median BT in patients with a negative PET-CT result was 2.75 mm (IQR 1.83-4.50) and in the positive group 6.25 mm (IQR 5.40-7.50) (P=.0013). In the ROC curve analysis (AUC 0.804, SE 0.054), an optimal value of 5 mm BT with the following values was obtained: sensitivity 90.91%, specificity 78.79%, negative predictive value (NPV) 98.1%, positive predictive value (PPV) 41.7%, diagnostic OR 37.1, and accuracy 80.52%. Mean follow-up was 18.66±14,35 months, detecting 2/53 (3.77%) deaths in the BT<5 mm group, and 7/24 (29.17%) in the BT≥5 mm group. Survival curves between both groups were significantly different (P=.0013). CONCLUSIONS A 5 mm cut-off point correctly distinguishes those patients with positive PET-CT from those with negative results in the early stages of cutaneous melanoma; therefore it could be included in initial staging of this subgroup of patients.
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Affiliation(s)
- A Ortega-Candil
- Servicio de Medicina Nuclear, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria Hospital Clínico San Carlos, Madrid, España.
| | - C Rodríguez-Rey
- Servicio de Medicina Nuclear, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria Hospital Clínico San Carlos, Madrid, España
| | - R Cano-Carrizal
- Servicio de Cardiología, Hospital Infanta Sofía, San Sebastián de los Reyes, Madrid, España
| | - E Cala-Zuluaga
- Servicio de Medicina Nuclear, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria Hospital Clínico San Carlos, Madrid, España
| | - J L González Larriba
- Servicio de Oncología Médica, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria Hospital Clínico San Carlos, Madrid, España
| | - A Jiménez-Ballvé
- Servicio de Medicina Nuclear, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria Hospital Clínico San Carlos, Madrid, España
| | - M E Fuentes-Ferrer
- Unidad de Gestión Clínica de Medicina Preventiva, Instituto de Investigación Sanitaria Hospital Clínico San Carlos, Madrid, España
| | - M N Cabrera-Martín
- Servicio de Medicina Nuclear, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria Hospital Clínico San Carlos, Madrid, España
| | - M J Pérez-Castejón
- Servicio de Medicina Nuclear, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria Hospital Clínico San Carlos, Madrid, España
| | - M García García-Esquinas
- Servicio de Radiodiagnóstico, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria Hospital Clínico San Carlos, Madrid, España
| | - L Lapeña-Gutierrez
- Servicio de Medicina Nuclear, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria Hospital Clínico San Carlos, Madrid, España
| | - J L Carreras-Delgado
- Servicio de Medicina Nuclear, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria Hospital Clínico San Carlos, Madrid, España
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