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Office dermatologic testing: the Tzanck preparation.

R T Brodell1, S E Helms, M Devine

  • 1Dermatology Section, Northeastern Ohio Universities College of Medicine, Rootstown.

American Family Physician
|September 1, 1991
PubMed
Summary
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The Tzanck preparation is a diagnostic test that helps differentiate between intraepidermal and subepidermal blistering diseases. This method is especially useful for confirming herpes infections, providing valuable diagnostic clues when clinical examination is inconclusive.

Area of Science:

  • Dermatology
  • Pathology
  • Microbiology

Background:

  • Distinguishing between intraepidermal and subepidermal vesicobullous diseases can be challenging based solely on clinical presentation.
  • The Tzanck preparation is a cytodiagnostic technique that offers insights into the nature of blistering skin conditions.
  • Herpes infections are a common group of diseases where this diagnostic method proves particularly beneficial.

Purpose of the Study:

  • To highlight the diagnostic utility of the Tzanck preparation in differentiating vesicobullous diseases.
  • To emphasize the Tzanck preparation's effectiveness in diagnosing herpes infections.
  • To provide a procedural guide for performing the Tzanck preparation.

Main Methods:

  • The Tzanck preparation involves obtaining a sample from the base of a vesicle or bulla.

Related Experiment Videos

  • Microscopic examination of stained Tzanck smears reveals characteristic cellular changes.
  • Key cytological findings aid in classifying the disease as intraepidermal or subepidermal.

    • Main Results:

    • The Tzanck preparation can reveal acantholysis (intraepidermal) or نموذجى inflammatory cells (subepidermal).
    • Tzanck smears are highly sensitive for detecting multinucleated giant cells characteristic of herpes simplex virus and varicella-zoster virus infections.
    • The test provides rapid preliminary diagnostic information.

    Conclusions:

    • The Tzanck preparation is a valuable, easily performed bedside test for the initial evaluation of vesicobullous disorders.
    • It serves as an important adjunct to clinical diagnosis, particularly for suspected herpes infections.
    • Understanding the procedure and interpretation of the Tzanck preparation enhances diagnostic accuracy in dermatology.