Renal cell cancer without a renal primary

Area of Science:

• Oncology
• Medical Case Reports
• Nephrology

Background:

• Renal cell carcinoma (RCC) incidence is rising, particularly in men.
• Metastatic disease at presentation occurs in one-third of patients.
• RCC metastasis typically involves multiple organs, but always with a known renal primary.

Observation:

• A unique case of renal cell cancer is presented.
• The initial presentation was a subcutaneous mass.
• Subsequent metastases were observed in the pancreas and parotid gland.

Findings:

• This case represents metastatic renal cell cancer without a detectable primary renal tumor.
• The presentation challenges the established understanding of metastatic patterns in renal cell carcinoma.
• The subcutaneous mass served as the initial indicator of disease spread.

Implications:

• This case expands the spectrum of clinical presentations for renal cell carcinoma.
• It highlights the importance of considering unusual metastatic sites and presentations.
• Further research may be needed to understand the mechanisms behind primary-site-absent metastasis.