Dermatology - Trichilemmal Cyst

Dermatology - Trichilemmal Cyst 
A trichilemmal cyst, which is the second most prevalent type of skin cyst, is commonly observed in middle-aged individuals, particularly women. Familial occurrences of numerous lesions are common.

The majority of trichilemmal cysts, more than 90%, are found on the scalp. The hair on the scalp above the cyst is often unaffected, although it may appear thinner if the cyst is of significant size.
Cysts are characterized by their smooth, hard, dome-shaped appearance, ranging in size from 0.5 to 5 centimeters. They are nodules or tumors that lack a central punctum or attachment to the epidermis. The cyst wall typically exhibits significant thickness, allowing for the complete removal of the cyst in its entirety. The interior of the object consists of keratin, a substance that is highly compact, uniform, and frequently hardened through calcification, featuring cholesterol clefts. In the event of cyst rupture, it can become inflamed and cause intense discomfort.
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The diagnosis is determined through clinical examination, and the possible alternatives include keloids, scars, epidermoid cysts, epidermal inclusion cysts, and lipomas.

Tricholemmal cysts are non-cancerous and do not necessitate treatment; however, they can be easily eliminated through surgical excision if desired.