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Updated: Jul 8, 2026

Murine Bilateral Renal Lymphadenectomy
06:31

Murine Bilateral Renal Lymphadenectomy

Published on: December 30, 2025

Primary mucosa-associated lymphoid tissue-type lymphoma arising in the kidney

Yoichiro Kato1, Michihiko Hasegawa, Susumu Numasato

  • 1Departments of Urology and Pathology, Morioka Red Cross Hospital, Morioka, Japan. katouro@morioka.jrc.or.jp

International Journal of Urology : Official Journal of the Japanese Urological Association
|January 11, 2008
PubMed

Insights

A rare kidney tumor was identified as mucosa-associated lymphoid tissue (MALT) lymphoma in a young man. This case highlights the importance of accurate diagnosis for this uncommon renal malignancy.

Area of Science:

  • Oncology
  • Pathology
  • Urology

Background:

  • Primary renal tumors are uncommon, with renal cell carcinoma being the most frequent. Lymphomas can rarely present as primary renal masses.
  • Mucosa-associated lymphoid tissue (MALT) lymphomas typically arise in extranodal sites, and primary renal involvement is exceptionally rare.

Observation:

  • A 30-year-old male presented with a right flank abdominal mass detected via ultrasonography.
  • Initial diagnosis suggested renal cell carcinoma, leading to radical nephrectomy.

Findings:

  • Histopathological examination confirmed the abdominal mass to be a primary low-grade mucosa-associated lymphoid tissue (MALT) lymphoma of the kidney.
  • This represents one of only six reported cases of primary renal MALT lymphoma in the medical literature.

Implications:

  • Accurate preoperative diagnosis is crucial for appropriate management of rare renal masses.
  • Surgical resection is the primary treatment modality for primary renal MALT lymphoma, with limited need for adjuvant chemotherapy in reported cases.

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