An unusual case of metastatic renal clear cell carcinoma presented as a solitary subcutaneous mass invading the manubrium

A 60-year-old Chinese man presented with a 7-month history of a mass with tenderness in the front of chest which gradually enlarged (Figure 1A). Chest computed tomography (CT) scan from local hospital demonstrated a lesion of 6.2 × 5.4 × 3.5 cm in the manubrium invading adjacent soft tissue without metastasis in the lung or the mediastinum (Figure 1B). Figure 1. ( A ) A subcutaneous fixed mass with tenderness in the front of manubrium; …