Perinephric myxoid pseudotumour of fat

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Perinephric myxoid pseudotumour of fat, abbreviated PMPF, is a rare lesion found around the kidney.[1]

General

  • Often elderly male.
  • Non-tumour kidney - typically medical kidney disease.
  • Good outcome.
  • Typically an incidental finding.

Microscopic

Features:

  • Myxoid background.
  • Mature fat without significant atypia.
  • Perivascular hyalinization.
  • Fibrosis.

DDx:

References

  1. Dashti NK, Fritchie KJ, Folpe AL (May 2019). "Perinephric myxoid pseudotumor of fat: a distinctive pseudoneoplasm most often associated with non-neoplastic renal disease". Hum Pathol 87: 37–43. doi:10.1016/j.humpath.2019.02.005. PMID 30826321.