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Area of Science:

  • Dermatology
  • Immunology
  • Pathology

Background:

  • Vesiculobullous disorders are classified as either immunobullous or non-immunobullous.
  • Accurate differentiation is essential for appropriate patient management and treatment strategies.

Purpose of the Study:

  • To analyze the spectrum of vesiculobullous disorders.
  • To evaluate the diagnostic utility of histopathology, direct immunofluorescence (DIF), and salt-split techniques.
  • To identify common immunologic markers and clinical associations.

Main Methods:

  • Histopathology and direct immunofluorescence (DIF) were employed.
  • A salt-split technique was utilized for further analysis.
  • 104 patients with vesiculobullous disorders were included in the study.

Main Results:

  • 74% of patients had immunobullous diseases, while 24% had non-immunobullous diseases.
  • Bullous pemphigoid (20.2%) and epidermolysis bullosa (11.5%) were the most frequent immunobullous and non-immunobullous lesions, respectively.
  • Immunobullous lesions were DIF positive, non-immunobullous lesions were DIF negative. Perilesional DIF demonstrated higher sensitivity and specificity than lesional DIF. Immunoglobulin G (IgG) was the most common antibody detected.

Conclusions:

  • Direct immunofluorescence (DIF) is a critical diagnostic tool for distinguishing immunobullous from non-immunobullous disorders.
  • Negative DIF results from both lesional and perilesional skin are necessary to classify a disorder as non-immunobullous.
  • The findings aid in the accurate diagnosis and classification of vesiculobullous conditions.