hair cast

(redirected from pseudonit)

hair cast

a cast composed of parakeratotic scales attached to scalp hair but freely movable up and down the hair shaft; found in scaling dermatitis of the scalp, including dandruff, psoriasis, and seborrheic dermatitis.
Synonym(s): pseudonit
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References in periodicals archive ?
With respect to diagnosis, the differential for suspected head lice should include dandruff or other conditions, hair product residue, pseudonits, nit shells, other insects, scabs, and dirt.
These "pseudonits" or hair shaft anomalies easily can be diagnosed under a lowpower microscope without any special mounts or stains, said Dr.
Hair casts, or pseudonits, are remnants of the inner root sheath of the hair follicle.