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Pseudoxanthoma elasticum (PXE)-like changes were found in the subcutaneous fat of nearly half of calciphylaxis patients. This finding aids in diagnosing calciphylaxis when classic signs are unclear.

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Area of Science:

  • Dermatology
  • Pathology
  • Rare Diseases

Background:

  • Calciphylaxis and pseudoxanthoma elasticum (PXE) are rare disorders.
  • Both conditions involve cutaneous calcification but present differently.
  • PXE-like changes were investigated in calciphylaxis biopsy specimens.

Purpose of the Study:

  • To identify PXE-like histological features in calciphylaxis biopsy specimens.
  • To assess the prevalence of these features in calciphylaxis cases.
  • To determine the diagnostic utility of PXE-like changes in calciphylaxis.

Main Methods:

  • Retrospective review of 13 calciphylaxis biopsy specimens.
  • Histological examination using H&E, Von Kossa, and Verhoeff-Van Gieson stains.
  • Assessment for PXE-like changes in the dermis and subcutaneous fat.

Main Results:

  • Six of 13 specimens (46.2%) exhibited PXE-like changes.
  • These changes were exclusively located in the subcutaneous fat.
  • The findings were observed in both uremic and non-uremic calciphylaxis patients.

Conclusions:

  • PXE-like changes in the subcutis can suggest calciphylaxis.
  • This finding is particularly useful when typical calciphylaxis histology is subtle or absent.
  • Recognizing these changes may improve diagnostic accuracy for calciphylaxis.