TRICHOEPITHELIOMA
TRICHOEPITHELIOMA ICD-10: D23.L13
• Trichoepitheliomas are benign appendage tumors with hair bulb differentiation.
• The lesions, which appear at puberty, occur on the face (Fig. 9-41) and less often on the scalp, neck, and upper trunk.
• Lesions may be only a few small pink or skin-colored papules. They gradually increase in number and can be confused with BCC (Fig. 9-41A).
• Trichoepitheliomas can also appear as solitary tumors, which may be nodular (Fig. 9-41B), or appear as ill-defined plaques like sclerosing BCC.
• Treatment: Electrocautery or excision.
A
B
FIGURE 9-41 • Trichoepitheliomas (A) Multiple, small, sharply defined smooth papules that look like early BCCs. (B) Trichoepithelioma, solitary type. A nodular tumor on the upper lip that can be confused with a basal carcinoma or squamous cell carcinoma.