Carcinoma ductal bilateral con segundo primario en tiroides: reporte de caso

Abstract

Invasive ductal carcinoma is the most common type of malignant breast tumor. Globally, breast cancer in women is the second leading cause of death; in Latin America, it is prevalent at 14.1%. In Ecuador, breast cancer accounts for 27% of the population between 40 and 55 years old. Synchronous bilateral breast cancer is rare, occurring in only 1 – 2.5% of patients with breast cancer. Non- invasive follicular thyroid neoplasia is low- risk, diagnosed histopathologically. There is no association between the two pathologies in this case, making it an intriguing case. Herein, the case of a 47- year- old patient with a history of a lump in the right breast for the past 7 years. She was diagnosed with bilateral breast cancer 3 years ago. Two years later, during follow- up examinations, a TIRADS 4 thyroid nodule was detected. A histopathological biopsy confirmed non-invasive follicular thyroid neoplasia. In the medical consensus, the decision was made to perform bilateral lumpectomy with radiotherapy, left thyroid lobectomy, and incidentally, supraventricular tachycardia was diagnosed, leading to radiofrequency ablation. In conclusion, through literature review and the patient's successful experience, combined with comprehensive management of each pathology, the different procedural approaches align. This case aims to elucidate the benefits of the various techniques employed for the patient, along with her progression.