Renal cell carcinoma with malakoplakia.

Area of Science:

• Nephrology
• Uropathology
• Oncology

Background:

• Long-standing urinary tract infections (UTIs) can lead to chronic inflammation and complications.
• Malakoplakia is a rare inflammatory condition often associated with bacterial infections, typically in the urinary tract.
• Renal cell carcinoma (RCC) is the most common type of kidney cancer.

Observation:

• An elderly female patient with a history of chronic UTIs presented with sudden macroscopic hematuria.
• Diagnostic workup and subsequent nephrectomy revealed a renal clear-cell carcinoma.
• The kidney also exhibited diffuse pyelonephritis and malakoplakia.

Findings:

• The case presents a unique association between renal clear-cell carcinoma and malakoplakia.
• This represents the first documented instance of kidney neoplasia occurring in conjunction with malakoplakia.
• Co-existing pyelonephritis was also noted, suggesting a complex inflammatory and neoplastic process.

Implications:

• This finding expands the known clinical spectrum associated with malakoplakia.
• It highlights the importance of considering malignancy in patients with chronic UTIs and unusual urinary findings.
• Further research may explore potential pathogenetic links between chronic inflammation, malakoplakia, and renal tumorigenesis.