What is trichoblastic carcinoma?
Trichoblastic carcinoma is a rare hair follicle tumour that is thought to occur from a malignant transformation of a benign trichoblastoma. The tumour arises from follicular germinative cells and develops dermal or subcutaneous fat invasion.
What is a Trichoblastoma?
Trichoblastoma is a rare, slow-growing, benign cutaneous tumor derived from follicular germinative cells. Trichoblastoma commonly appears as an asymptomatic, symmetrical, well-circumscribed, skin-colored to brown or blue-black papule or nodule.
What causes Trichoblastoma?
Trichoblastoma is a rare benign tumor that arises from the germ cells of the hair follicle. The characteristic clinical presentation is a solitary, asymptomatic nodule on the face or scalp. Trichoblastoma may occur sporadically, in association with a hereditary disease, or within a nevus sebaceus.
Is Trichoblastoma cancerous?
Trichoblastomas (TBs) are extremely rare, benign hair germ tumors that can mimic basal cell carcinoma (BCC). They usually arise on the head or neck and have a potential for malignant transformation, albeit it is rare.
How is Trichoblastoma treated?
Occasionally true trichoblastomas may be excised for cosmetic reasons or if they occur in functionally sensitive areas. Treatment options include curettage and electrodesiccation or surgical excision.
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 is trichilemmal differentiation?
Histology of trichilemmal cyst Closer inspection of the cyst wall identifies trichilemmal differentiation (Figures 3 and 4) as occurs in the outer root sheath of the hair follicle. This is seen as maturation of squamous epithelium with lack of a granular layer.
Do you need a biopsy for trichoblastoma?
Trichoblastoma is a benign follicular tumour that requires no treatment. However, because of its association with basal cell carcinoma and the chance that it may transform into trichoblastic carcinoma, additional biopsy or complete surgical excision or Mohs micrographic surgery should be considered if there is uncertainty about the diagnosis.
What kind of tumor is a trichoepithelioma?
Trichoepitheliomas and trichoblastomas are benign adnexal tumors which may display some features that mimic basal cell carcinoma Trichoblastomas are not known to be familial but are the most common tumor type found in association with nevus sebaceus
What kind of tumour is in the hair follicle?
Trichoblastoma is a small benign hair follicle tumour originating from follicular germinative cells. It is thought to be a variant of trichoepithelioma. It typically presents as a solitary mass of small skin-coloured to brown or blue-black papules or nodules, usually 1-2 cm in diameter.