trichilemmal

trichilemmal

 [trik″ĭ-lem´al]
pertaining to the outer root sheath of a hair.

trichilemmal

/trich·i·lem·mal/ (trik″ĭ-lem´al) pertaining to the root sheath of the hair.

trichilemmal

pertaining to the outer root sheath of a hair.

trichilemmal cyst
greatly enlarged hair follicles, filled with keratin. They resemble epidermoid cysts. Called also pilar cysts.
References in periodicals archive ?
4,121) In addition, BCC with extensive clear cell changes may raise consideration for trichilemmal carcinoma, clear cell melanoma, and other clear cell tumors presenting in the skin.
observed that pilomatricoma was the most common benign tumor followed by dermoid cyst followed by steatocystoma multiplex, syringoma, and trichilemmal cyst.
Proliferating 2 trichilemmal cyst C) Apocrine Tumours 1.
The differential diagnosis of PC includes basal cell carcinoma, squamous cell carcinoma, epidermoid cyst, foreign-body granuloma, multiple osteomas of the skin, osteochondroma, parotid tumor, proliferating trichilemmal cyst, and other entities.
Eruptive Vellus Dermal cysts lined by stratified squamous Hair Cysts epithelium, with granular layer, contained vellus hairs; no sebaceous glands [6] Epidermoid cysts Cysts lined by stratified epithelium, with granular layer, lamellar keratin inside [7] Milia Small cysts in the superficial dermis coated by epithelium with granular cell layer' contains lamellar keratin [7] Trichilemmal cysts Cysts lined by squamous epithelium without granular layer, filled with homogenous keratin [7] Steatocystomas Cysts lined by stratified squamous epithelium without granular layer and vellus hairs inside the cavity; sebaceous lobules close to the cystic wall [7]
Malignant cutaneous neoplasms are less commonly seen and include basal cell carcinoma and to a lesser extent squamous cell carcinoma trichilemmal carcinoma sebaceous carcinoma porocarcinoma and apocrine carcinoma.
Concomitant presence of sebaceous hyperplasia was observed in 10 cases, and in seven cases there was an epidermal or trichilemmal cyst.
Tomkova H, Fujimoto W, Arata J: Expression of keratins {K10 and K17) in steatocystoma multiplex, eruptive vellus hair cysts, and epidermoid and trichilemmal cysts.
In fibrous papule, perifollicular fibroma, infundibular cyst and proliferating trichilemmal cyst, BerEP4 stains some of the basaloid cells17.
7% and included: sebaceous carcinoma, adnexal carcinoma, porocarcinoma, adenoid cystic carcinoma, apocrine carcinoma, Merkel-cell carcinoma, malignant nodular hidradenoma, and malignant proliferating trichilemmal tumor.
This category would include SCCs arising in sun-damaged skin of elderly patients (95% of cases), verrucous carcinoma and other human papillomavirus-related SCCs in immunocompetent patients, spindle cell SCC (unrelated to radiation exposure), and trichilemmal carcinoma.