trichilemmoma

[trik″ĭ-lem-o´mah]

a benign neoplasm of the lower outer root sheath of the hair.

trich·i·lem·mo·ma

(trik'i-le-mō'mă),

A benign tumor derived from outer root sheath epithelium of a hair follicle, consisting of cells with pale-staining cytoplasm containing glycogen; multiple trichilemmomas are present on the face in Cowden disease.

Synonym(s): tricholemmoma

[trichi- + G. lemma, husk, + -ōma, tumor]

trichilemmoma

/trich·i·lem·mo·ma/ (-lem-o´mah) a benign neoplasm of the lower outer root sheath of the hair.

trich·i·lem·mo·ma

(trik'i-le-mō'mă)

[trichi- + G. lemma, husk, + -ōma, tumor]

trichilemmoma

a rare, benign neoplasm of the lower outer root sheath of the hair; resembles trichoepithelioma.

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References in periodicals archive ?

Individual papules may be misdiagnosed as basal cell carcinoma (BCC), intradermal melanocytic nevus, seborrheic keratosis, sebaceous hyperplasia, syringoma, angiofibroma, trichilemmoma, steatocystoma, TE, and hamartoma of sebaceous follicles.

Basaloid follicular hamartoma

Histologic features of a trichilemmoma include lobular epidermal growth extending into the dermis, with glycogen-containing clear or pale-staining cells evident within the area of lobular growth and peripheral palisading of basophilic cells.

Trichilemmomas are slow-growing flesh-colored flat-topped facial Papules or plaques 1-5 mm in diameter.

One or two trichilemmomas are a relatively common isolated finding in the general population.

Cowden syndrome more common than suspected. (Linked to Increased Risk for Breast CA)

Slide 2 Slide 3 11 AK SCC in situ 29 Trichilemmoma Trichilemmoma 63 SCC SCC 72 AK SCC in situ 84 BCC BCC 95 Nevus Nevus 147 SCC in situ SCC in situ 203 Nevus Dysplastic nevus 215 BCC BCC 279 Dysplastic nevus Dysplastic nevus (severe) 306 Hemangioma Hemangioma 310 Nevus Nevus 395 SCC in situ SCC in situ 459 BCC BCC 464 SCC in situ SCC in situ * AK indicates actinic keratosis; SCC, squamous cell carcinoma; SK, seborrheic keratosis; and BCC, basal cell carcinoma.

Prospective step sections for small skin biopsies

Histologic features of a trichilemmoma include lobular epidermal growth extending into the dermis, with glycogen containing clear or pale-staining cells evident within the area of lobular growth and peripheral palisading of basophilic cells.

When a patient presents with either multiple trichilemmomas or facial papules, it's appropriate to do a complete exam for evidence of Cowden syndrome, plus questioning regarding family history of breast, thyroid, and other cancers.

Cowden syndrome more common than suspected: linked to breast cancer risk. (Clinical Rounds)

It is characterized by wart-like papules known as trichilemmomas.

Skin conditions can flag inherited internal diseases

Patients frequently exhibit trichilemmomas, which often appear as small white bumps on the bridge of the nose.