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[Metanephric renal adenoma]

M C Camacho García1, E Redondo Martínez, A Rey López

  • 1Servicio de Anatomía Patológica y Urología, Hospital Ntra. Sra. del Pino, Las Palmas de Gran Canaria, España.

Archivos Espanoles De Urologia
|April 29, 1998
PubMed
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Metanephric adenoma is a rare, benign kidney tumor. This case highlights its distinct features, differentiating it from malignant renal tumors like Wilms tumor.

Area of Science:

  • Nephrology
  • Oncology
  • Pathology

Background:

  • Metanephric adenoma is a rare renal neoplasm with no malignant potential.
  • It can be histogenically related to Wilms tumor.
  • Distinguishing metanephric adenoma from other renal tumors is crucial for appropriate management.

Observation:

  • A 54-year-old female presented with an incidentally detected small renal mass.
  • Imaging revealed a solid, circumscribed mass in the left kidney's medulla.
  • Histopathology showed small epithelial cells with tubular/papillary arrangement and calcifications, characteristic of metanephric adenoma.

Findings:

  • The tumor measured 2.3 cm and lacked atypia, mitosis, necrosis, or invasion.
  • Abundant psammoma-like calcifications were noted.

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  • Histological features confirmed the diagnosis of metanephric adenoma.

    • Implications:

    • Metanephric adenoma is a distinct entity that requires differentiation from renal cell carcinoma and Wilms tumor.
    • Accurate histopathological diagnosis is essential for patient prognosis and treatment.
    • Understanding the benign nature of metanephric adenoma guides clinical decision-making.