Breast cancer with synchronous renal cell carcinoma: a rare case of dual malignancy

Abstract

Synchronous breast and kidney carcinomas are extremely rare with only 11 cases have been reported in the literature so far in the world. We present a case of a 40-year-old lady diagnosed with right invasive ductal cell carcinoma. During the workup of the patient, an incidental renal mass was identified. After appropriate investigations, the patient underwent a right modified radical mastectomy with a right partial nephrectomy. The patient recovered successfully and was put on regular follow-up post-discharge. We are reporting a case of synchronous presentation of carcinoma breast with RCC which is rare since in world literature, most of the multiple malignancies reported are metastasis/metachronous breast carcinoma with RCC. The aetiology of synchronous malignancy is complex, some primary tumours may not be symptomatic and detected in the routine metastatic workup, and this poses a challenge for the surgical team. Hence with the histopathological report and with the other clinical and radiological parameters, we made a final diagnosis of carcinoma right breast pT2N0M0 with synchronous renal cell carcinoma (RCC) pT1aN0M0. the patient was planned for adjuvant chemotherapy and advised regular follow-up.