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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 Baker's Dozen on the Scalp: An Interesting Case of Multiple Trichilemmal Cysts

5 citations, January 2014 in “Journal of Cutaneous and Aesthetic Surgery”

A woman had 13 non-cancerous cysts on her scalp successfully removed in one surgery.

research Trichilemmal Cysts With Divergent Ductal Differentiation: A Series of 4 Cases

2 citations, November 2020 in “The American journal of dermatopathology/American journal of dermatopathology”

Sweat duct differentiation in trichilemmal cysts is very rare and can be successfully removed with surgery.

research Trichilemmal Cyst of the Neck: Case Report and Review of the Literature

1 citations, August 2021

A young girl had a rare neck cyst removed and needs careful monitoring for related health issues.

research Malignant Appearance of Trichilemmal Cyst: A Case Report With Review of the Literature

November 2023 in “International surgery journal”

A man's neck lump was a trichilemmal cyst, not cancer, and should be fully removed due to rare risk of becoming malignant.

research GWAS Identifies Three Susceptibility Loci for Trichilemmal Cysts

September 2021 in “The journal of investigative dermatology/Journal of investigative dermatology”

Three genes linked to the development of trichilemmal cysts were found.

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