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Related Experiment Videos

Fluorescence hysteroscopy using 5-aminolevulinic: a descriptive study.

Pius Wyss1, Andrea Degen, Rosmarie Caduff

  • 1Department of Obstetrics and Gynecology, University Hospital of Zurich, Zürich 8091, Switzerland. pius.wyss@fhk.usz.ch

Lasers in Surgery and Medicine
|September 2, 2003
PubMed
Summary

Fluorescence hysteroscopy using topical 5-aminolevulinic acid (ALA) is feasible for detecting endometrial cancer. While it effectively highlights cancerous tissue, it cannot distinguish between hyperplastic and atypical endometrial areas.

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Area of Science:

  • Gynecologic Oncology
  • Medical Imaging
  • Endometrial Diagnostics

Background:

  • Topical 5-aminolevulinic acid (ALA) application is being explored for enhanced hysteroscopy.
  • Assessing the feasibility of ALA-induced fluorescence hysteroscopy is crucial for endometrial diagnostics.

Purpose of the Study:

  • To evaluate the feasibility of fluorescence hysteroscopy after topical ALA administration.
  • To characterize the optical appearance of normal and neoplastic endometrium using this technique.

Main Methods:

  • Fifty-four patients received 2 mL of 2% 5-ALA solution intrauterinely 4 hours before hysteroscopy.
  • Fluorescence hysteroscopy findings were correlated with histological diagnoses (H&E staining).
  • Histological specimens included curettage and targeted biopsies.

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Main Results:

  • Endometrial carcinoma was detected in two patients, both showing intense red fluorescence.
  • Low fluorescence was observed in atrophic endometrium (6.2%).
  • Fluorescence hysteroscopy could not differentiate hyperplastic endometrial areas with or without atypia.

Conclusions:

  • Intrauterine ALA application enables feasible fluorescence hysteroscopy.
  • Cancerous, hyperplastic, and secretory endometrial tissues exhibit significant red fluorescence.
  • This technique shows promise for identifying neoplastic endometrial changes.