Clear Cell Renal Cell Carcinoma: Rare and Atypical Metastatic Localizations-A Case Series

Area of Science:

• Oncology
• Nephrology
• Pathology

Background:

• Clear cell renal cell carcinoma (ccRCC) is the most common kidney cancer subtype.
• ccRCC exhibits high vascularity and metastatic potential.
• While common sites include lungs and liver, rare metastases pose diagnostic challenges.

Purpose of the Study:

• To report four cases of ccRCC with rare metastatic localizations.
• To highlight diagnostic and therapeutic challenges associated with atypical ccRCC metastases.
• To emphasize the importance of personalized follow-up for ccRCC patients.

Main Methods:

• Retrospective case series analysis.
• Detailed reporting of four ccRCC patients with unusual metastases.
• Review of diagnostic and therapeutic management strategies.

Main Results:

• Four cases presented with atypical ccRCC metastases: nasal (1), thyroid (1), gallbladder (1), and pancreas (4).
• Metastases were often asymptomatic, leading to delayed diagnosis.
• Individualized treatment included surveillance, surgery, radiotherapy, or immunotherapy.

Conclusions:

• ccRCC demonstrates diverse metastatic patterns, including rare sites.
• Prolonged, personalized follow-up after nephrectomy is essential.
• A multidisciplinary approach is critical for managing rare metastatic sites.