Peripilar keratin casts: a study with the scanning electron microscope

Area of Science:

• Dermatology
• Histopathology
• Scanning Electron Microscopy

Background:

• Peripilar keratin casts are an uncommon finding.
• Understanding their ultrastructure is crucial for diagnosis.

Purpose of the Study:

• To present two cases of peripilar keratin casts.
• To investigate the ultrastructure of these casts using Scanning Electron Microscopy (SEM).

Main Methods:

• Case presentation of two individuals with peripilar keratin casts.
• Detailed Scanning Electron Microscopy (SEM) analysis of the casts' surface and underlying hair structure.

Main Results:

• SEM revealed a highly irregular and disordered surface of the peripilar keratin casts.
• The internal cast structure displayed a characteristic "sponge"-like morphology.
• The hair cuticle beneath the casts showed slight flaking and fissures.
• The hair surface directly adjacent to the casts appeared normal.

Conclusions:

• Peripilar keratin casts possess a unique ultrastructural "sponge"-like organization.
• SEM provides valuable insights into the morphology of these casts.
• Further research may elucidate the formation mechanisms and clinical significance of these findings.