Dermoscopic Findings in Trichoblastoma

Trichoblastoma is a benign cutaneous neoplasm that is clinically and histologically similar to basal cell carcinoma. We report the dermoscopic features seen in 2 cases of facial trichoblastoma. One case presented with very short, delicate, scarcely branching telangiectases against a pearly white background. In the second case, the veins were also short and scarcely branching, but they were arranged in a crown pattern, with white striae and milia-like cysts. Although dermoscopic evidence of fine, scarcely branching telangiectases is not specific to a diagnosis of trichoblastoma, these features may be useful for differentiating this neoplasm from nodular basal cell carcinoma.

ResumenEl tricoblastoma es una neoplasia cutánea benigna, con un aspecto clínico e histológico similar al carcinoma basocelular nodular. Comunicamos los hallazgos dermatoscópicos de 2 casos de tricoblastomas localizados en la cara. Un caso presentaba telangiectasias muy finas y cortas, poco ramificadas, sobre un fondo blanquecino perlado. El otro caso mostraba vasos cortos y poco ramificados dispuestos en corona, con estrías blancas y puntos similares a quistes de milium. Aunque las telangiectasias finas y poco ramificadas no son un criterio específico del tricoblastoma, pueden resultar útiles en el diagnóstico diferencial frente al carcinoma basocelular nodular.