In renal cell carcinoma (RCC), metastasis to subcutaneous soft tissues is rare, with only a small number of cases reported to date, especially those based on ultrasound findings. This case report presents the ultrasound findings of an 81-year-old Chinese man who developed RCC presenting as subcutaneous soft-tissue metastasis 15 years after curative nephrectomy. We suggest that ultrasound-guided puncture biopsy should be considered when such suspicious lesions are found.