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Did you mean Trichilemmal Keratin Cysts?

GlossaryTrichilemmal Cysts

non-cancerous, keratin-filled lumps typically found on the scalp

Trichilemmal cysts, also known as pilar cysts, are non-cancerous, fluid-filled lumps that typically develop on the scalp. They originate from the outer root sheath of hair follicles and are filled with keratin, a protein found in hair, skin, and nails. These cysts are usually firm, smooth, and can sometimes be hereditary.

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research Outer Root Sheath Keratinization in Anagen and Catagen of the Mammalian Hair Follicle: A Seventh Distinct Type of Keratinization in the Hair Follicle - Trichilemmal Keratinization

59 citations , August 1981 in “PubMed”

Trichilemmal keratinization is a unique process in hair follicles where the outer root sheath turns into keratin without a specific layer.

research Trichilemmoma: Features of Keratin Expression in CS-5 Trichocyst System Tumors

1 citations , January 1995 in “Skin Cancer”

Immunohistochemistry helps accurately identify and differentiate malignant trichilemmoma.

research Hair Sheath Keratins in Follicular Tumors: Identification in Keratoacanthoma and Their Significance as Differential Criteria from Squamous Cell Carcinoma

January 1990 in “The Nishinihon Journal of Dermatology”

Follicular structures help differentiate keratoacanthoma from squamous cell carcinoma.

research Expression of the Orphan Protein Plet-1 During Trichilemmal Differentiation of Anagen Hair Follicles

30 citations , February 2010 in “The journal of investigative dermatology/Journal of investigative dermatology”

Plet-1 protein helps hair follicle cells move and stick to tissues.

research Ultrastructural Characteristics of Trichilemmal Cysts: Report of Two Cases

2 citations , June 2001 in “Medical Electron Microscopy”

Trichilemmal cysts may form from hair follicle outer root sheath growth.

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