Hepatocellular carcinoma metastasis presenting as a pedunculated bladder mass

Area of Science:

• Oncology
• Hepatology
• Urologic Oncology

Background:

• Hepatocellular carcinoma (HCC) is a primary liver cancer with significant global incidence.
• Extrahepatic metastasis indicates advanced disease and a poor prognosis.
• Metastasis to the urinary bladder from HCC is an exceptionally rare event, with limited prior documentation.

Observation:

• A 66-year-old male with advanced HCC presented with metastasis to the urinary bladder.
• This case represents the seventh documented instance of bladder metastasis from HCC globally.
• Notably, this is the first reported case of bladder metastasis occurring after the patient received both locoregional and systemic therapies for HCC.

Findings:

• The study details a rare case of hepatocellular carcinoma metastasis to the urinary bladder.
• This metastasis occurred subsequent to comprehensive treatment including locoregional and systemic therapies.
• The occurrence highlights the potential for unusual metastatic patterns even after aggressive treatment.

Implications:

• This case expands the understanding of rare metastatic sites for advanced HCC.
• It suggests that the urinary bladder can be a target for HCC metastasis, irrespective of prior treatment modalities.
• Further research may be warranted to elucidate the mechanisms and clinical significance of such rare metastases.