Pitfalls on Screening in Clinical Trials: Positive Pregnancy Test in a Nonpregnant Woman with Metastatic Breast Cancer

Edward Espinal^1*, Maribel Palomero¹, María Cebollero², Sara Lopez-Tarruella¹, Yolanda Jerez¹, Santiago Lizarraga³, Ivan Marquez-Rodas¹ and Miguel Martín¹

¹Medical Oncology Department, Hospital General Universitario Gregorio Marañón, Spain, E-mail: palomero@hgugm.es

²Department of Pathology, Hospital General Universitario Gregorio Marañon, Spain, E-mail: palomero@hgugm.es

³Oncological Gynecology Specialist, Hospital General Universitario Gregorio Marañón, Spain, E-mail: palomero@hgugm.es

^*Corresponding Author: Edward Espinal, MD, Medical Oncology Department, Hospital General Universitario Gregorio Marañón, Calle Maiquez, 7. Madrid 28007, Spain, Tel: +34655816157 Email: