What is desmoplastic trichilemmoma?
What is desmoplastic trichilemmoma?
Desmoplastic trichilemmoma (DT) is a rare benign histologic variant of trichilemmoma, a benign growth of the pilosebaceous follicle’s outer sheath. 1. Headington and French first described trichilemmoma in 1962.
Is trichilemmoma cancer?
Trichilemmomas are benign tumors arising from the outer cells of the hair follicle.
What is Trichilemmal carcinoma?
Trichilemmal carcinoma (TC) is a rare malignant tumor that develops from the external root sheath of the hair follicle. It usually is found in the skin that occurs on the sun-exposed areas of the body [1].
What is a Fibrofolliculoma?
Listen to pronunciation. (FY-broh-fuh-LIH-kyoo-LOH-muh) A benign tumor of the hair follicle that appears as a small, whitish papule. Fibrofolliculomas are typically found on the face, ears, neck, and upper torso.
What does Trichilemmal carcinoma look like?
What are the clinical features of trichilemmal carcinoma? Lesions of trichilemmal carcinoma are generally found on the scalp, forehead or neck. It is a tan or flesh-coloured spot that may resemble a wart. It most commonly occurs in women over 40 years of age.
Is proliferating Trichilemmal cyst cancerous?
Trichilemmal cysts are common fluid-filled growths that arise from the isthmus of the hair follicle. They can form rapidly multiplying trichilemmal tumors-, also called proliferating trichilemmal cysts, which are typically benign. Rarely, proliferating trichilemmal cysts can become cancerous.
How is clear cell basal cell carcinoma differentiated from trichilemmoma?
Clear cell basal cell carcinoma: Lacks the eosinophilic basement membrane, and displays mitotic activity often set in a mucinous stroma. Desmoplastic trichilemmoma must be differentiated from infiltrating basal cell carcinoma and invasive squamous carcinoma.
What is trichilemmoma of the skin?
Trichilemmoma is a benign skin tumour thought to arise from the outer root sheath of the hair follicle. Trichilemmoma is usually a symmetrical epithelial nodular proliferation. Figure 1. There may be mild papillomatosis with overlying hyperkeratosis.
Is this a trichilemmoma with CD34 stain?
This is a trichilemmoma. CD34 staining may be very focal and require careful sectioning to demonstrate.
How is multiple trichilemmoma diagnosed in Cowden syndrome?
Accessed September 13th, 2021. Diagnosis is rarely made by clinical examination, more often made by pathologist via tissue examination revealing characteristic histological morphology Comment: This is a benign tumor. Multiple trichilemmomas may be associated with Cowden syndrome.
