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    Glossary Hair Casts

    tiny, cylindrical structures encircling hair shafts, often mistaken for lice eggs

    Hair casts, also known as pseudonits, are tiny, cylindrical, white or yellowish structures that encircle the hair shaft. They can be mistaken for lice eggs (nits) but are actually composed of keratin and other debris. Hair casts can be easily moved along the hair shaft and are often associated with conditions like seborrheic dermatitis or psoriasis.

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      research Hair casts: Classification, staining characteristics, and differential diagnosis

      27 citations , January 1983 in “Journal of the American Academy of Dermatology”
      This article proposes a classification system for hair casts to resolve confusion in existing literature and describes a staining technique to distinguish peripilar keratin casts from other hair disorders, without providing new clinical results.

      research Hair Casts: A Clinical and Electron Microscopic Study

      24 citations , December 1990 in “Pediatric Dermatology”
      This study observed that hair casts, seen in girls with tightly drawn hairstyles, may result from local circulatory disturbances and scalp inflammation.
      Is Propionibacterium Acnes Associated With Hair Casts And Alopecia?

      research Is Propionibacterium acnes associated with hair casts and alopecia?

      19 citations , January 2012 in “International Journal of Trichology”
      This case series suggests that Propionibacterium acnes colonization may contribute to the development of hair casts and diffuse non-scarring alopecia, as patients' symptoms improved with antibiotics targeting the bacteria.
      Hair Casts or Pseudonits

      research Hair casts or pseudonits

      18 citations , January 2011 in “International journal of trichology”
      This case report describes a 9-year-old girl with pseudonits and highlights frequent challenges in correctly diagnosing this condition.

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