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[Transoperative anatomopathologic examinations: quality control]

C T Cerski1, M F Lopes, L M Kliemann

  • 1Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, RS.

Revista Da Associacao Medica Brasileira (1992)
|October 1, 1994
PubMed
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Frozen sections (FS) provide crucial surgical orientation. This study found FS accuracy at HCPA reached 95%, comparable to established literature values, ensuring reliable intraoperative diagnoses.

Area of Science:

  • Pathology
  • Surgical Pathology
  • Histopathology

Background:

  • Frozen sections (FS) are vital for intraoperative surgical guidance in general hospitals.
  • Accurate FS diagnoses are essential for real-time surgical decision-making.

Purpose of the Study:

  • To evaluate the diagnostic accuracy of frozen sections (FS) performed at Hospital de Clínicas de Porto Alegre (HCPA).
  • To compare HCPA's FS accuracy with existing literature benchmarks.

Main Methods:

  • A prospective study analyzed 2,152 FS cases performed between March 1986 and September 1991.
  • FS diagnoses were compared against definitive paraffin-embedded diagnoses to determine accuracy rates.
  • The frequency of FS for specific organs like lymph nodes, ovary, breast, and thyroid was recorded.

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Main Results:

  • FS constituted 3.7% of all conventional pathology examinations during the study period.
  • Overall accuracy for FS was 95%, rising to 97.8% when inconclusive results were excluded.
  • Discrepancies included False Positive (0.4%), False Negative (1.8%), and inconclusive (2.8%) diagnoses.

Conclusions:

  • The accuracy of frozen sections at HCPA aligns with reported international standards, ranging from 90.4% to 98.5%.
  • These findings support the reliability of FS for intraoperative surgical orientation at HCPA.