RESUMO
Trichoblastoma is a benign cutaneous neoplasm that consists of follicular germinative cells. We report a case of trichoblastoma in a 58-year-old man. The tumor was presented as a solitary symmetrical shaped pedunculated 5.0x4.0x2.0cm sized multilobular tumor on right lower leg for 2 years. Histopathologic examination showed well circumscribed dermal tumor composed of multilobular tumor islands of palisaded basaloid epithelial cells. The tumoral lobules were concentrically surrounded by hyalinized collagen bundles with fibroblasts. The overall architecture was reminiscent of hair bulbs. Cytokeratin 14 stain showed positive reaction, but cytokeratin 10 stain showed negative reaction. The tumor was completely excised with clear margin. No sign of recurrence has been noted until 9 months later.
Assuntos
Humanos , Pessoa de Meia-Idade , Colágeno , Células Epiteliais , Fibroblastos , Cabelo , Hialina , Ilhas , Queratina-14 , Queratinas , Perna (Membro) , RecidivaRESUMO
Trichoblastoma includes all benign follicular germinative cell tumors in skin. We presented a case of trichoblastoma which occurred on the scalp as a large pedunculated tumor. The tumor was composed of lobular aggregations of basaloid epithelial cells and numerous primitive papillary mesenchymal bodies. Stromal retraction was observed between the stroma adjacent to epithelial nests and surrounding normal dermis. Focal connection to the overlying epidermis was observed. The classification and terminology for the benign neoplasms with follicular differentiation was discussed.