Hyperglycemia associated with renal cell carcinoma

Area of Science:

• Oncology
• Endocrinology
• Nephrology

Background:

• Renal cell carcinoma (RCC) is a malignancy of the kidney.
• Paraneoplastic syndromes are rare disorders triggered by an altered immune response to a tumor.
• Endocrinopathies are a known category of paraneoplastic syndromes.

Observation:

• A patient presented with newly diagnosed, uncontrolled diabetes mellitus.
• The patient also had an incidentally discovered renal cell carcinoma.
• Following a radical nephrectomy for the renal cell carcinoma, the diabetes resolved completely.

Findings:

• Laboratory investigations did not identify any other endocrine disorders.
• The resolution of diabetes post-nephrectomy suggests a direct link to the tumor.
• Hyperglycemia and diabetes mellitus are proposed as potential paraneoplastic endocrinopathies associated with RCC.

Implications:

• This case expands the spectrum of known paraneoplastic syndromes associated with renal cell carcinoma.
• Clinicians should consider screening for renal cell carcinoma in patients with unexplained hyperglycemia or diabetes.
• Further research is warranted to understand the mechanisms underlying this paraneoplastic phenomenon.