Abstract
A case of trichilemmoma in continuity with a pigmented basal cell carcinoma is presented with dermatoscopy and dermatopathology. The distinction between the two lesions was evident dermatoscopically and was confirmed dermatopathologically. While trichilemmoma has been reported in association with basal cell carcinoma and dermatoscopy images of four previous cases of trichilemmoma have been published, no previous dermatoscopy image has been published of trichilemmoma associated with basal cell carcinoma.
Highlights
A case of trichilemmoma in continuity with a pigmented basal cell carcinoma is presented with dermatoscopy and dermatopathology
While trichilemmoma has been reported in association with basal cell carcinoma and dermatoscopy images of four previous cases of trichilemmoma have been published, no previous dermatoscopy image has been published of trichilemmoma associated with basal cell carcinoma
Trichilemmoma is a benign tumor derived from the external sheath cells of pilosebaceous units [1] and desmoplastic trichilemmoma is a rare variant, which can present clinically with features suggesting invasive malignancy [2]
Summary
A case of trichilemmoma in continuity with a pigmented basal cell carcinoma is presented with dermatoscopy and dermatopathology. Examination showed a single small non-pigmented nodular lesion located on the left cheek in continuation with a small, pigmented macular lesion (Figure 1). Dermatoscopy (Figure 2) revealed a raised pink lesion, 3.5 mm in diameter, with a radial arrangement of vessels peripherally, with centered blood vessels in the middle of the lesion, these vessels being centered in skin-colored clods.
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