Abstract
Background: Metastasis of renal cell carcinoma (RCC) to the oral cavity is rare. Given the poor prognosis of metastatic RCC, treatment choice is difficult. Here, we report a case of RCC metastasis to the maxillary bone, and provide a detailed literature review regarding the patient characteristics, treatments and outcomes of RCC metastasis to the oral cavity.Case presentation: An 89-year-old Japanese man presented with an 8 × 8-mm granulomatous tumor with palpable pulsation in the left upper gingiva, which had been clinically suspected as an arteriovenous malformation. The patient had undergone left nephrectomy for clear cell carcinoma 7 years prior. Pulmonary metastasis had appeared 3 years later. The patient underwent tumor resection of the maxilla after intravascular embolization, and the tumor was histopathologically diagnosed as a metastasis of clear cell RCC to the maxillary bone. Seventeen months after surgery, he died because of pulmonary metastasis without evidence of recurrence in the oral cavity.Conclusion: Our literature review reveals that oral metastatic lesions of renal cancer often exhibit rapid enlargement and cause severe symptoms, such as dysphagia and bleeding. Although oral metastasis of RCC has a poor prognosis due to the presence of concurrent disseminated metastases, surgical therapy may be recommended because of its high local control rate and ability to maintain quality of life.
Rhabdoid differentiation in different types of renal cell carcinoma: A report of two cases and literature review
