Multiple primary cancer is a self-explanatory term, albeit very uncommon. In most instances, when patients have a malignancy, the possibility of metastasis should be considered. Renal cell carcinoma (RCC) is one such cancer. However, as unlikely as it is, there is always a chance that another separate, unrelated malignancy could be present. Here, we would like to discuss a unique case of a 66-year-old female who not only developed primary RCC but also primary invasive mucinous adenocarcinoma of the lung. This revelation prompted a change in management, resulting in the medical team treating the two malignancies separately via surgical intent as opposed to treating metastatic RCC, which is more geared toward systemic medical therapy.
Dao et al. (Thu,) studied this question.